Ionizable cationic compound

Abstract

Novel ionizable lipid compounds of Formula I are provided. The use of the compounds in forming lipid nanoparticles is described. The lipid nanoparticles may encapsulate a therapeutic, such as a nucleic acid, and these may be used in the delivery of the therapeutic and in methods of treating certain conditions or for inducing an immune response.

Description

[0001] IONIZABLE CATIONIC COMPOUND

[0002] FIELD

[0003] [1] The present disclosure relates to cationic and / or ionizable lipid compounds that can be used, in combination with other lipid molecules, to form lipid nanoparticles for delivery of a polynucleotide to a subject.

[0004] BACKGROUND

[0005] [2] Nucleic acid-based therapies have shown substantial promise in a range of therapeutic applications. The delivery of polynucleotides such as messenger RNA (mRNA), small interfering RNA (siRNA), antisense oligonucleotides, plasmids, DNA and the like does, however, present a number of challenges. Free nucleic acids, such as RNAs, are subject to rapid enzymatic degradation and so generally do not persist systemically. Additionally, due to their negative charge the nucleic acids may not be able to effectively cross the cellular barriers to enter the necessary intracellular compartment, for example, for translation or to otherwise achieve their effect.

[0006] [3] Lipid particles, such as lipid nanoparticles (LNPs), have therefore been used to formulate nucleic acids so as to protect them from degradation and improve cellular uptake and intracellular delivery. LNPs are commonly formed from ionizable cationic lipids and other lipid components such as neutral lipids, sterols such as cholesterol and PEGylated lipids. Ionizable cationic lipids are amphiphilic molecules having a lipophilic region containing one or more hydrocarbon groups and a hydrophilic region containing at least one positively charged or ionizable polar head group. Such cationic lipids are ionized at an appropriate pH and can then form a positively charged complex with nucleic acids, making it easier for the nucleic acids to pass through the plasma membrane of the cell and enter the cytoplasm.

[0007] [4] The first siRNA therapeutic to be approved, Onpattro (patisiran), entered the market just a few years ago for treatment of hereditary amyloidogenic transthyretin (TTR) amyloidosis. Patisiran’ s therapeutic effect relies on siRNA-mediated TTR gene silencing, preventing mutant protein production to at least prevent disease progression. The efficient delivery of the siRNA depends upon the LNP technology. Even more recently, nucleic acid vaccines have emerged as a promising approach to the treatment and prevention of various diseases, including against the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) responsible for causing the on-going worldwide pandemic of the severely infectious coronavirus disease 2019 (COVID-19). mRNA vaccines rely on the delivery of the mRNA into the cytoplasm of host cells, where it is transcribed into antigenic proteins to trigger the production of an immune response. The large size and negative charge of mRNA prevents cellular uptake and so LNPs are again necessary for appropriate delivery.

[0008] [5] Different ionizable cationic lipids may present not only different physicochemical profiles, including their acid dissociation constant (pKa) value, thereby affecting their ability to complex with the nucleic acid, but also different toxicity profiles in vivo and so it will be apparent to the skilled person that there is an on-going need for improved ionizable cationic lipid compounds which are suitable to form lipid particles, such as lipid LNPs, for delivery of nucleic acids and polynucleotides.

[0009] BRIEF SUMMARY

[0010] [6] Embodiments of the present invention provide for novel ionizable cationic lipid compounds, and pharmaceutically acceptable salts, prodrugs and stereoisomers thereof, which can form lipid particles, for example LNPs, in the presence of additional lipids including one or more of neutral lipids, charged lipids, structural lipids, PEGylated lipids and analogs thereof, and which can be used for the delivery of a polynucleotide. Compositions comprising such lipid particles, methods of forming the lipid particles, their use in delivering a polynucleotide and methods of using the lipid particles in the treatment of a range of diseases, disorders and conditions are provided.

[0011] [7] Accordingly, in some embodiments, the present disclosure provides for a compound of Formula A:

[0012] Formula A; wherein W is selected from the group consisting of Formula Al, Formula All, and wherein

[0013] R1and R2are each independently selected from the group consisting of -H, -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0014] X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2; wherein

[0015] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0016] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0017] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0018] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0019] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0020] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0021] [8] In some embodiments, the present disclosure provides for a compound of

[0022] Formula Ala: Formula Ala; wherein

[0023] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0024] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0025] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0026] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0027] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0028] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-; Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0029] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0030] [9] In some embodiments, the present disclosure provides for a compound of

[0031] Formula Alla:

[0032] Formula Alla; wherein

[0033] X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2;

[0034] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0035] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0036] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0037] Formula la;

[0038] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0039] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0040] Q1and Q2are each independently selected from the group consisting of -Ci-

[0041] Cnalkyl- and -C2-Ci2alkenyl-; and

[0042] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0043]

[0010] In some embodiments, the present disclosure provides for a compound of

[0044] Formula Allla:

[0045] Formula Allla; wherein

[0046] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0047] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyl, and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0048] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0049] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0050] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0051] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0052] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0053]

[0011] In one embodiment, the present disclosure provides for a compound of

[0054] Formula I:

[0055] Formula I; wherein n is an integer from 0 to 6;

[0056] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0057] R3and R4are each independently selected from the group consisting of -H -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; and

[0058] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0059] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0060] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0061] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0062] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0063]

[0012] In embodiments, lipid nanoparticles (LNPs) are provided which comprise a compound of Formula I.

[0064]

[0013] In embodiments, the LNPs further comprise a polynucleotide.

[0065]

[0014] In embodiments, a pharmaceutical composition comprising such LNPs and at least one pharmaceutically acceptable carrier, diluent, or excipient is provided.

[0066]

[0015] In additional embodiments, a method of delivering a polynucleotide, within the foregoing LNPs, to a mammalian cell is provided.

[0067]

[0016] In additional embodiments, a method of producing a polypeptide of interest in a mammalian cell is provided.

[0068]

[0017] In still additional embodiments, a method of treating a disease, disorder, or condition in a subject is provided by administering one or more of the foregoing LNPs comprising a polynucleotide, or a pharmaceutical composition comprising same, to a subject in need of such treatment.

[0069]

[0018] The LNPs comprising a polynucleotide, or a pharmaceutical composition comprising same, may be delivered to the subject as a component of a vaccine.

[0070] BRIEF DESCRIPTION OF THE DRAWINGS

[0071]

[0019] Figure 1 shows the results of a FACS potency assay of an LNP formulation of the present disclosure relative to an LKY750 (control) ionizable lipid LNP.

[0072]

[0020] Figure 2 shows the results of the in vivo potency of LNP formulations of the present disclosure relative to an LKY750 (control) ionizable LNP.

[0021] Figure 3 shows the results of immunogenicity studies of several lipids of the present disclosure relative to the LKY750 (control) ionizable lipid.

[0073] DETAILED DESCRIPTION

[0074]

[0022] The present disclosure is based on the use of certain novel biodegradable lipid compounds as a component of an LNP for the delivery of a polynucleotide. The novel lipid compounds present biodegradable groups that may assist in reducing toxicity or improving clearance, in vivo.

[0075]

[0023] In one embodiment, the LNP may be a component of a vaccine, although the therapeutic use of the compounds described herein and the use of LNPs that they form a component of, is not so limited.

[0076]

[0024] In some embodiments, the LNPs formed may be suitable for the delivery of messenger RNA (mRNA).

[0077]

[0025] In some embodiments, the LNPs formed may be suitable for the delivery of mRNA as a component of an mRNA vaccine.

[0078] General

[0079]

[0026] Throughout this specification, unless specifically stated otherwise or the context requires otherwise, reference to a single step, composition of matter, group of steps or group of compositions of matter shall be taken to encompass one and a plurality (i.e. one or more) of those steps, compositions of matter, groups of steps or groups of compositions of matter.

[0080]

[0027] Those skilled in the art will appreciate that the present disclosure is susceptible to variations and modifications other than those specifically described. It is to be understood that the disclosure includes all such variations and modifications. The disclosure also includes all of the steps, features, compositions and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations or any two or more of said steps or features.

[0028] The present disclosure is not to be limited in scope by the specific embodiments described herein, which are intended for the purpose of exemplification only. Functionally equivalent products, compositions and methods are clearly within the scope of the present disclosure.

[0081]

[0029] Any embodiment of the present disclosure herein shall be taken to apply mutatis mutandis to any other embodiment of the disclosure unless specifically stated otherwise.

[0082]

[0030] Unless specifically defined otherwise, all technical and scientific terms used herein shall be taken to have the same meaning as commonly understood by one of ordinary skill in the art (for embodiments, in organic synthetic chemistry, cell culture, molecular genetics, immunology, immunohistochemistry, protein chemistry, and biochemistry).

[0083]

[0031] Unless otherwise indicated, any recombinant protein, cell culture, and immunological techniques utilized in the present disclosure are standard procedures, well known to those skilled in the art. Such techniques are described and explained throughout the literature in sources such as, J. Perbal, A Practical Guide to Molecular Cloning, John Wiley and Sons (1984), J. Sambrook et al. Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory Press (1989), T.A. Brown (editor), Essential Molecular Biology: A Practical Approach, Volumes 1 and 2, IRL Press (1991), D.M. Glover and B.D. Hames (editors), DNA Cloning: A Practical Approach, Volumes 1-4, IRL Press (1995 and 1996), and F.M. Ausubel et al. (editors), Current Protocols in Molecular Biology, Greene Pub. Associates and Wiley-Interscience (1988, including all updates until present), Ed Harlow and David Lane (editors) Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, (1988), and J.E. Coligan et al. (editors) Current Protocols in Immunology, John Wiley & Sons (including all updates until present).

[0084]

[0032] The term “and / or”, e.g., “X and / or Y” shall be understood to mean either “X and Y” or “X or Y” and shall be taken to provide explicit support for both meanings or for either meaning.

[0085]

[0033] The terms “from” and “to”, when indicating a range, shall be understood to mean the range is inclusive of the recited lower and upper values. For example, “p is an integer from 0 to 6” shall be understood as including the situation in which p is not present (p is 0), that in which p is 6, as well as each whole number integer value in between, i.e. p is 1, 2 , 3, 4, or 5.

[0086]

[0034] Throughout this specification, the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.

[0087]

[0035] As used herein the term "derived from" shall be taken to indicate that a specified integer may be obtained from a particular source albeit not necessarily directly from that source.

[0088] Selected Definitions

[0089]

[0036] As used herein, the terms “lipid particle”, “lipid nanoparticle” or “LNP” shall be understood to refer to lipid-based particles having at least one dimension on the order of nanometers (e.g., 1-1,000 nm) and which comprise a compound of any formulae described herein. In embodiments, LNPs are formulated in a composition for delivery of a polynucleotide to a desired target such as a cell, tissue, organ, tumor, and the like. The LNPs generally comprise an ionizable cationic compound of the present disclosure and one or more of a neutral lipid, a charged lipid, a sterol, and a PEGylated lipid. In embodiments, the lipid particle or LNP may be selected from liposomes or vesicles, where an aqueous volume is encapsulated by amphipathic lipid bilayers (e.g., single; unilamellar or multiple; multilamellar), micelle-like lipid nanoparticles having a non- aqueous core and solid lipid nanoparticles. In embodiments, the lipid nanoparticle or LNP may have a structure that includes a single monolayer or bilayer of lipids that encapsulates a solid phase. In preferred embodiments, the lipid nanoparticle or LNP does not have an aqueous phase or other liquid phase in its interior.

[0090]

[0037] A "cationic compound", “ionizable cationic compound”, "cationic lipid compound", “ionizable cationic lipid compound”, or like terms, refer to a lipid compound of any structural formulae described herein, and which is capable of bearing a positive charge. Ionizable cationic lipids disclosed herein include one or more nitrogen- containing groups which may bear the positive charge. They are ionizable such that they can exist in a positively charged or neutral form, depending on pH. The ionization of the cationic lipid affects the surface charge of the lipid nanoparticle under different pH conditions.

[0091]

[0038] The term "neutral lipid" refers to any of a number of lipid species that exist either in an uncharged or neutral zwitterionic form at a selected pH, particularly at physiological pH. Such lipids include, but are not limited to, phosphotidylcholines such as l,2-Distearoyl-sn-glycero-3-phosphocholine (DSPC), l,2-Dipalmitoyl-sn-glycero-3- phosphocholine (DPPC), l,2-Dimyristoyl-sn-glycero-3-phosphocholine (DMPC), 1- Palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), l,2-dioleoyl-sn-glycero-3- phosphocholine (DOPC), and phophatidylethanolamines such as 1,2-Dioleoyl-sn- glycero-3-phosphoethanolamine (DOPE), sphingomyelins (SM).

[0092]

[0039] The term "charged lipid" refers to any of a number of lipid species that exist in either a positively charged or negatively charged form independent of the pH within a useful physiological range, e.g., pH ~3 to pH ~9. Non-limiting examples of charged lipids include phosphatidylserines, phosphatidic acids, phosphatidylglycerols, phosphatidylinositols, sterol hemisuccinates, dialkyl trimethylammonium-propanes, (including DOTAP and DOTMA), dialkyl dimethylaminopropanes, ethyl phosphocholines, and dimethylaminoethane carbamoyl sterols.

[0093]

[0040] The term “polynucleotide” as used herein refers to a polymer containing at least two deoxyribonucleotides or ribonucleotides in either single- or double- stranded form and includes DNA, RNA, and hybrids thereof. DNA may be in the form of antisense molecules, plasmid DNA, cDNA, PCR products, or vectors. RNA may be in the form of small hairpin RNA (shRNA), messenger RNA (mRNA), self-amplifying messenger RNA (saRNA or samRNA), antisense RNA, miRNA, micRNA, multivalent RNA, dicer substrate RNA or viral RNA (vRNA), and combinations thereof. Polynucleotides include those containing known nucleotide analogs or modified backbone residues or linkages, which are synthetic, naturally occurring, and non-naturally occurring, and which have similar binding properties as the reference polynucleotide. Examples of such analogs include, without limitation, phosphorothioates, phosphoramidates, methyl phosphonates, chiral-methyl phosphonates, 2'-O-methyl ribonucleotides, and peptide-nucleic acids (PNAs). Unless specifically limited, the term encompasses polynucleotides containing known analogues of natural nucleotides that have similar binding properties as the reference polynucleotide. Unless otherwise indicated, a particular nucleic acid sequence also implicitly encompasses conservatively modified variants thereof (e.g., degenerate codon substitutions), alleles, orthologs, single nucleotide polymorphisms, and complementary sequences as well as the sequence explicitly indicated. Specifically, degenerate codon substitutions may be achieved by generating sequences in which the third position of one or more selected (or all) codons is substituted with mixed-base and / or deoxyinosine residues (Batzer et al., Nucleic Acid Res., 19:5081 (1991); Ohtsuka et al., J. Biol. Chem., 260:2605-2608 (1985); Rossolini et al., Mol. Cell. Probes, 8:91-98 (1994)).

[0094]

[0041] An "effective amount" or "therapeutically effective amount" of a therapeutic polynucleotide is an amount sufficient to produce the desired effect, such as an increase or inhibition of expression of a target sequence in comparison to the normal expression level detected in the absence of the polynucleotide. Suitable assays for measuring expression of a target gene or target sequence include, examination of protein or RNA levels using techniques known to those of skill in the art such as dot blots, northern blots, in situ hybridization, ELISA, immunoprecipitation, enzyme function, fluorescence or luminescence of suitable reporter proteins, as well as phenotypic assays.

[0095]

[0042] As used herein, "prodrug" is meant to indicate a compound that may be converted under physiological conditions or by solvolysis to a compound of any one or more of the formulae described herein. Thus, the term "prodrug" refers to a metabolic precursor of such a compound that is pharmaceutically acceptable. A prodrug may be inactive when administered to a subject in need thereof but is converted in vivo to an active form. The term may also include any covalently bonded carriers, which release the active compound in vivo when such prodrug is administered to a mammalian subject. Prodrugs of a compound of Formula I, or other formulae described herein, may be prepared by modifying functional groups present in the compound in such a way that the modifications are cleaved, either in routine manipulation or in vivo, to the parent compound.

[0043] "Pharmaceutically acceptable carrier, diluent or excipient", or like terms, refers to any ingredient other than the compounds described herein (for example, a vehicle capable of suspending, complexing, or dissolving the active compound) and having the properties of being substantially nontoxic and non-inflammatory in a patient. Excipients may include, for example: anti-adherents, antioxidants, binders, coatings, compression aids, disintegrants, dyes (colors), emollients, emulsifiers, fillers (diluents), film formers or coatings, flavors, fragrances, glidants (flow enhancers), lubricants, preservatives, printing inks, sorbents, suspending or dispersing agents, sweeteners, and waters of hydration. Exemplary excipients include, but are not limited to: butylated hydroxy toluene (BHT), calcium carbonate, calcium phosphate (dibasic), calcium stearate, croscarmellose, crosslinked polyvinyl pyrrolidone, citric acid, crospovidone, cysteine, ethylcellulose, gelatin, hydroxypropyl cellulose, hydroxypropyl methylcellulose, lactose, magnesium stearate, maltitol, mannitol, methionine, methylcellulose, methyl paraben, microcrystalline cellulose, polyethylene glycol, polyvinyl pyrrolidone, povidone, pregelatinized starch, propyl paraben, retinyl palmitate, shellac, silicon dioxide, sodium carboxymethyl cellulose, sodium citrate, sodium starch glycolate, sorbitol, starch (corn), stearic acid, sucrose, talc, titanium dioxide, vitamin A, vitamin E (alpha-tocopherol), vitamin C, xylitol, and other species disclosed herein.

[0096]

[0044] "Pharmaceutically acceptable salt" includes both acid and base addition salts. Lists of suitable salts may be found in Remington ’s Pharmaceutical Sciences, 18th ed., Mack Publishing Company, Easton, PA, 1990, p. 1445, and Journal of Pharmaceutical Science, 66, 2-19 (1977). Acid addition salts are those which retain the biological effectiveness and properties of the free bases, which are not biologically or otherwise undesirable, and which are formed with inorganic acids such as, but are not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid and the like, and organic acids such as, but not limited to, acetic acid, 2,2-dichloroacetic acid, adipic acid, alginic acid, ascorbic acid, aspartic acid, benzenesulfonic acid, benzoic acid, 4-acetamidobenzoic acid, camphoric acid, camphor- 10-sulfonic acid, capric acid, caproic acid, caprylic acid, carbonic acid, cinnamic acid, citric acid, cyclamic acid, dodecylsulfuric acid, ethane- 1,2-disulfonic acid, ethane sulfonic acid, 2- hydroxyethanesulfonic acid, formic acid, fumaric acid, galactaric acid, gentisic acid, glucoheptonic acid, gluconic acid, glucuronic acid, glutamic acid, glutaric acid, 2-oxo- glutaric acid, glycerophosphoric acid, glycolic acid, hippuric acid, isobutyric acid, lactic acid, lactobionic acid, lauric acid, maleic acid, malic acid, malonic acid, mandelic acid, methanesulfonic acid, mucic acid, naphthalene- 1,5-disulfonic acid, naphthalene-2- sulfonic acid, l-hydroxy-2-naphthoic acid, nicotinic acid, oleic acid, orotic acid, oxalic acid, palmitic acid, pamoic acid, propionic acid, pyroglutamic acid, pyruvic acid, salicylic acid, 4-aminosalicylic acid, sebacic acid, stearic acid, succinic acid, tartaric acid, thiocyanic acid, p-toluenesulfonic acid, trifluoroacetic acid, undecylenic acid, and the like. Base addition salts are those which retain the biological effectiveness and properties of the free acids, which are not biologically or otherwise undesirable. These salts are prepared from addition of an inorganic base or an organic base to the free acid. Salts derived from inorganic bases include, but are not limited to, the sodium, potassium, lithium, ammonium, calcium, magnesium, iron, zinc, copper, manganese, aluminum salts and the like. Preferred inorganic salts are the ammonium, sodium, potassium, calcium, and magnesium salts. Salts derived from organic bases include, but are not limited to, salts of primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines and basic ion exchange resins, such as ammonia, isopropylamine, trimethylamine, diethylamine, triethylamine, tripropylamine, diethanolamine, ethanolamine, deanol, 2-dimethylaminoethanol, 2-diethylaminoethanol, dicyclohexylamine, lysine, arginine, histidine, caffeine, procaine, hydrabamine, choline, betaine, benethamine, benzathine, ethylenediamine, glucosamine, methylglucamine, theobromine, triethanolamine, tromethamine, purines, piperazine, piperidine, N- ethylpiperidine, polyamine resins and the like.

[0097]

[0045] As used herein, "stereoisomer" refers to a compound made up of the same atoms bonded by the same bonds but having different three-dimensional structures, which are not interchangeable. The present invention contemplates various stereoisomers and mixtures thereof and includes "enantiomers", which refers to two stereoisomers whose molecules are nonsuperimposable mirror images of one another.

[0098]

[0046] As used herein, the term "biodegradable group" is a group that may facilitate faster metabolism of a lipid in a mammal. An ester is a suitable biodegradable group, and compounds of the present disclosure present two such groups for improved in vivo biodegradability.

[0099]

[0047] As used herein, "encapsulation efficiency" refers to the amount of a polynucleotide that becomes part of an LNP composition, relative to the initial total amount of polynucleotide used in the preparation of the LNP composition. For example, if 92 mg of polynucleotides are encapsulated in an LNP composition out of a total 100 mg of polynucleotide initially provided to the composition, the encapsulation efficiency may be given as 92%. As used herein, "encapsulation" may refer to complete, substantial, or partial enclosure, confinement, surrounding, or encasement.

[0100]

[0048] As used herein, the term “subject” shall be taken to mean any animal, such as a mammal, and including humans. Exemplary subjects include but are not limited to humans and non-human primates. For example, the subject is a human.

[0101]

[0049] As used herein, the term "mammal" includes humans and both domestic animals such as laboratory animals and household pets (e.g., cats, dogs, swine, cattle, sheep, goats, horses, rabbits), and non-domestic animals such as wildlife and the like.

[0102]

[0050] As used herein, the term “alkyl” encompasses both straight chain (i.e., linear) and branched chain hydrocarbon groups. Examples of alkyl groups include methyl, ethyl, n-propyl, iso-propyl, n-butyl, / -butyl, z-butyl, sec-butyl, pentyl, and hexyl groups. In one example, the alkyl group is of one to thirty carbon atoms (i.e. -C1-C30 alkyl).

[0103]

[0051] As used herein, the term “alkenyl” encompasses both straight chain (i.e., linear) and branched chain hydrocarbon groups in which at least one carbon-carbon bond is unsaturated (i.e., a carbon-carbon double -bond). Examples of alkenyl groups include ethenyl, propenyl, butenyl, pentenyl, and hexenyl. In one example, the alkenyl group is of two to thirty carbon atoms (i.e., -C2-C30 alkenyl).

[0104]

[0052] As used herein, the term “alkynyl” encompasses both straight chain (i.e., linear) and branched chain hydrocarbon groups in which at least one carbon-carbon bond is a triple bond (i.e., a carbon-carbon triple-bond). Examples of alkynyl groups include ethynyl, propynyl, butynyl, pentynyl, and hexynyl. In one example, the alkynyl group is of two to thirty carbon atoms (i.e., -C2-C30 alkynyl).

[0053] It will be appreciated that an alkyl or alkenyl or alkynyl group with any number of carbon atoms falling between, and inclusive of, the specified number (i.e., - C1-C30 alkyl provides for one to 30 carbon atoms; -C2-C30 alkenyl provides for one to 30 carbon atoms; -C2-C30 alkynyl provides for two to 30 carbon atoms) is provided for.

[0105]

[0054] Similarly, it will be appreciated that an alkenyl group having any order of unsaturation (i.e., one, two, three, four, five, and so on, carbon-carbon double-bonds) is provided for. For example, an alkenyl group may have one (i.e., one carbon-carbon double-bond), two (i.e., two carbon-carbon double -bond), three (i.e., three carbon-carbon double-bond), four (i.e., four carbon-carbon double-bond), five (i.e., five carbon-carbon double-bond), or more orders of unsaturation.

[0106]

[0055] It will be appreciated that an alkynyl group having any order of unsaturation (i.e., one, two, three, four, five, and so on, carbon-carbon triple-bonds) is provided for. For example, an alkynyl group may have one (i.e., one carbon-carbon triple-bond), two (i.e., two carbon-carbon triple-bond), three (i.e., three carbon-carbon triple -bond), four (i.e., four carbon-carbon triple -bond), five (i.e., five carbon-carbon triple-bond), or more orders of unsaturation.

[0107]

[0056] A compound of the present invention may have one or more carbon-carbon single bonds, one or more carbon-carbon double bonds and / or one or more carbon-carbon triple bonds.

[0108]

[0057] As used herein, the term “heterocyclyl” encompasses a cyclic compound comprising at least one heteroatom (e.g., an atom other than carbon, such as S, O, N). The heterocyclyl may be monocyclic or polycyclic (i.e., two cycles fused together). The heterocyclyl may be fully saturated (i.e., all single bonds), partially saturated (i.e., a mixture of single and double bonds), or unsaturated (including aromatic heterocycles). Examples of heterocyclyls include pyrrolidine / pyrrolidinyl, pyrazole / pyrazolyl, thiophene / thiophenyl, and tetrahydropyran / tetrahydropyranyl. Compounds

[0109]

[0058] In embodiments, the compounds of the present disclosure may provide for advantages over other select prior art ionizable cationic lipid compounds including one or more of: improved complexation with a polynucleotide; beneficial pKa properties; improved encapsulation efficiency as part of an LNP; reduced toxicity; improved biodegradability; improved in vivo clearance; desirable N:P ratio when complexed with a polynucleotide; desirable polydispersity index for the LNPs comprising them; and improved LNP formation.

[0110]

[0059] In one broad form, the present disclosure provides for a compound of Formula A:

[0111] Formula A; wherein W is selected from the group consisting of Formula Al, Formula All, wherein

[0112] R1and R2are each independently selected from the group consisting of -H, -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH), and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents; X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2; wherein

[0113] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0114] R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-CioalkcnyL and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyk and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0115] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0116] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0117] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0118] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0119] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0120]

[0060] In embodiments, W is selected from the group consisting of Formula Al,

[0121] Formula All, and Formula AIII:

[0122]

[0061] In one embodiment, W is Formula Al:

[0123] Formula Al.

[0124]

[0062] In one embodiment, W is Formula All:

[0125] Formula All.

[0126]

[0063] In one embodiment, W is Formula AIII:

[0127] Formula AIII.

[0128]

[0064] In embodiments, the compound of Formula A is a compound of Formula

[0129] Ala:

[0130]

[0131] Formula Ala; wherein

[0132] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0133] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH), and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0134] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -Ci-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0135] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0136] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0137] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0138] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0139] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0140]

[0065] In embodiments, the compound of Formula A is a compound of Formula Alla:

[0141] Formula Alla; wherein

[0142] X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2;

[0143] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0144] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -Ci-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -Ci-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0145] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0146] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0147] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0148] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0149]

[0066] In embodiments, the compound of Formula A is a compound of Formula

[0150] Aina:

[0151] Formula Allla; wherein

[0152] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0153] R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-Cioalkenyl, and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkenyl, and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0154] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0155] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0156] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0157] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0158] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0159]

[0067] In embodiments, the compound of Formula A is a compound of Formula I:

[0160] Formula I; wherein n is an integer from 0 to 6;

[0161] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH), and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0162] R3and R4are each independently selected from the group consisting of -H and - Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0163] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0164] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0165] L1, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0166] Q1and Q2are each independently selected from the group consisting of -Ci- Cnalkyl- and -C2-Ci2alkenyl-; and

[0167] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0168]

[0068] In embodiments, n is an integer from 0 to 6. The variable ‘n’ will be understood to indicate the number of repeating carbon atoms within the parentheses as depicted in the structure of Formula I. In embodiments, n is 0, 1, 2, 3, 4, 5, or 6. In one embodiment, n is 0. In embodiments where n is 0, it will be appreciated that the relevant carbon atom and -V substituent will not be present, and instead a direct bond between W and the carbon atom of the -(C=O)O- will be formed in Formula A. In one embodiment, n is 1. In one embodiment, n is 2. In one embodiment, n is 3. In one embodiment, n is 4. In one embodiment, n is 5. In one embodiment, n is 6. In embodiments, n is an integer from 2 to 6, or 3 to 6, or 1 to 5, or 2 to 5, or 3 to 5, or 1 to 4, or 2 to 4.

[0169]

[0069] In embodiments, X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl. In one embodiment, X1is -H or -Ci-Ci2alkyl. In one embodiment, X2is -H or -Ci-Ci2alkyl. In one embodiment, X3is -H or -Ci- Cnalkyl. In one embodiment, X1is -H. In one embodiment, X2is -H. In one embodiment, X3is -H. In one embodiment, X1is -Ci-Ci2alkyl. In one embodiment, X2is -Ci-Ci2alkyl. In one embodiment, X3is -Ci-Ci2alkyl. In one embodiment, X1is -Ci-Cealkyl. In one embodiment, X1is -Ci-Csalkyl. In one embodiment, X1is -Cialkyl. In one embodiment, X2is -Ci-Cealkyl. In one embodiment, X2is -Ci-Csalkyl. In one embodiment, X2is - Cialkyl. In one embodiment, X3is -Ci-Cealkyl. In one embodiment, X3is -Ci-Csalkyl. In one embodiment, X3is -Cialkyl. In one embodiment, X1is -Cialkyl, X2is -H, and X3is -H. in one embodiment, X1is -H, X2is -H, and X3is -Cialkyl. In one embodiment, X1is -Cialkyl, X2is -H, and X3is -Cialkyl.

[0170]

[0070] In embodiments, t is an integer from 1 to 3. In one embodiment, t is 1. In one embodiment, t is 2. In one embodiment, t is 3. Accordingly, in some embodiments, the compound of Formula All is selected from the group consisting of:

[0171]

[0172]

[0071] In embodiments, u is an integer from 1 to 2. In one embodiment, u is 1. In one embodiment, u is 2. Accordingly, in some embodiments, the compound of Formula All is selected from the group consisting of:

[0173]

[0072] In embodiments, Formula All is selected from the group consisting of:

[0174]

[0073] In embodiments, V is selected from the group consisting of -H and -OH. In one embodiment, V is -H. In one embodiment, V is -OH. It will be appreciated that, as discussed above, when n is 0, V, and the carbon to which it is bound, is not present. It will also be appreciated that when n is 2 or more, two or more V will be present. In one embodiment, n is 2, and two V are present, each independently selected from the group consisting of -H and -OH. Each instance of V is independently selected from -H and - OH.

[0074] In embodiments, R1is selected from the group consisting of -H, -C(=S)- N(H)-C(H)2-C(H)(OH)-C(H)2(OH), and -Ci-Ci2alkyl. In one embodiment, R1is -H. In one embodiment, R1is -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH). In one embodiment, R1is -Ci-Ci2alkyl. In one embodiment, R1is a straight chain -Ci-Ci2alkyl. In one embodiment, R1is a branched chain -Ci-Ci2alkyl. In embodiments, R1is -Ci-Ci2alkyl, - Ci-Cioalkyl, -Ci-Csalkyl, -Ci-Cealkyl, -Ci-C4alkyl, or -Cialkyl. In one embodiment, R1is a -Ci-Cioalkyl. In one embodiment, R1is a -Ci-Csalkyl. In one embodiment, R1is a - Ci-Cealkyl. In one embodiment, R1is a -Ci-C4alkyl. In one embodiment, R1is a -Cialkyl.

[0175]

[0075] In embodiments, R2is selected from the group consisting of -H, -C(=S)- N(H)-C(H)2-C(H)(OH)-C(H)2(OH), and -Ci-Ci2alkyl. In one embodiment, R2is -H. In one embodiment, R2is -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH). In one embodiment, R2is -Ci-Ci2alkyl. In one embodiment, R2is a straight chain -Ci-Ci2alkyl. In one embodiment, R2is a branched chain -Ci-Ci2alkyl. In embodiments, R2is -Ci-Ci2alkyl, - Ci-Cioalkyl, -Ci-Csalkyl, -Ci-Cealkyl, -Ci-C4alkyl, or -Cialkyl. In one embodiment, R2is a -Ci-Cioalkyl. In one embodiment, R2is a -Ci-Csalkyl. In one embodiment, R2is a - Ci-Cealkyl. In one embodiment, R2is a -Ci-C4alkyl. In one embodiment, R2is a -Cialkyl.

[0176]

[0076] It will be appreciated that R1and R2are each independently selected, meaning R1and R2may be the same or otherwise different. In one embodiment, R1is - H and R2is -H. In one embodiment, R1is Ci-Ci2alkyl and R2is -H. In one embodiment, R1is Ci-Ci2alkyl and R2is Ci-Ci2alkyl. In one embodiment, R1is -C2alkyl and R2is - C2alkyl. In one embodiment, R1is -Cialkyl and R2is -Cialkyl.

[0177]

[0077] In embodiments, R1and R2cyclise together to form a 5-7-membered heterocyclyl. In one embodiment, R1and R2cyclise together to form a 5 -membered heterocyclyl. In one embodiment, R1and R2cyclise together to form a 6-membered heterocyclyl. In one embodiment, R1and R2cyclise together to form a 7-membered heterocyclyl. In some embodiments, the nitrogen atom to which R1and R2are both bonded, is the only non-carbon atom in the 5-7-membered heterocyclyl. In some other embodiments, two or more nitrogen atoms are present in the 5-7-membered heterocyclyl.

[0178]

[0078] Accordingly, in some embodiments, the compound of Formula I is selected from the group consisting of:

[0179]

[0180] Formula Ila; Formula lib; and Formula lie.

[0181]

[0079] In embodiments, when R1and R2cyclise together to form a 5-7-membered heterocyclyl, the 5-7-membered heterocyclyl is not further substituted. In other embodiments, when R1and R2cyclise together to form a 5-7-membered heterocyclyl, the heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents. That is, when R1and R2cyclise together to form a 5-7-membered heterocyclyl, the heterocyclyl is optionally substituted with one, two, three, four, five, or six -Ci-Cealkyl substituents. In one embodiment, R1and R2cyclise together to form a 5-7-membered heterocyclyl with one -Ci-Cealkyl substituent. In one embodiment, the substituent is a straight chain -Ci-Cealkyl substituent. In one embodiment, the substituent is a branched chain -Ci-Cealkyl substituent. It will be appreciated that when more than one -Ci-Cealkyl substituent is substituted on the 5-7-membered heterocyclyl, each -Ci-Cealkyl substituent may be independently a straight chain -Ci-Cealkyl substituent or a branched chain -Ci- Cealkyl substituent. In one embodiment, the 5-7-membered heterocyclyl is substituted with one -Cialkyl substituent. In one embodiment, the 5-7-membered heterocyclyl is substituted with one -Cialkyl substituent.

[0182]

[0080] In embodiments, R3is selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-Cioalkcnyl, and -Ci-Cioalkynyl. In one embodiment, R3is -H. In one embodiment, R3is -Ci-Cioalkyl. In one embodiment, R3is -Ci-Cealkyl. In one embodiment, R3is -Ci-Cioalkcnyl. In one embodiment, R3is -Ci-Cioalkynyl. In one embodiment, R3is a straight chain -Ci-Cioalkyl. In one embodiment, R3is a branched chain -Ci-Cioalkyl. In embodiments, R3is -Ci-Cioalkyl, -Ci-Cnalkyl, -Ci-Cioalkyl, -Ci- Csalkyl, -Ci-C6alkyl, -Ci-Csalkyl, -Ci-C4alkyl, -Ci-C3alkyl, -Ci-C2alkyl, or -Cialkyl. In one embodiment, R3is a -Ci-Cioalkyl. In one embodiment, R3is a -Ci-Ci2alkyl. In one embodiment, R3is a -Ci-Cioalkyl. In one embodiment, R3is a -Ci-Csalkyl. In one embodiment, R3is a -Ci-Cealkyl. In one embodiment, R3is a -Ci-Csalkyl. In one embodiment, R3is a -Ci-C4alkyl. In one embodiment, R3is a -Ci-Csalkyl. In one embodiment, R3is a -Ci-Cialkyl. In one embodiment, R3is a -Ci alkyl. In one embodiment, R3is a straight chain -Ci-Cioalkcny I. In one embodiment, R3is a branched chain -Ci-Cioalkenyl. In embodiments, R3is -Ci-Cioalkenyl, -C2-Ci2alkenyl, -C2- Cioalkenyl, -C2-Csalkenyl, -C2-Cealkenyl, -C2-Csalkenyl, -C2-C4alkenyl, or -C2- Csalkenyl. In one embodiment, R3is a -C2-C2oalkenyl. In one embodiment, R3is a -C2- Cnalkenyl. In one embodiment, R3is a -C2-Cioalkenyl. In one embodiment, R3is a -C2- Csalkenyl. In one embodiment, R3is a -C2-C6alkenyl. In one embodiment, R3is a -C2- Csalkenyl. In one embodiment, R3is a -C2-C4alkenyl. In one embodiment, R3is a -C2- Csalkcnyl. In one embodiment, R3is a straight chain -C2-C2oalkynyl. In one embodiment, R3is a branched chain -C2-C2oalkynyl. In embodiments, R3is -C2-C2oalkynyl, -C2- Cnalkynyl, -C2-Cioalkynyl, -C2-Csalkynyl, -C2-Cealkynyl, -C2-Csalkynyl, -C2- C4alkynyl, or -C2-C3alkynyl. In one embodiment, R3is a -C2-C2oalkynyl. In one embodiment, R3is a -C2-Ci2alkynyl. In one embodiment, R3is a -C2-Cioalkynyl. In one embodiment, R3is a -C2-Csalkynyl. In one embodiment, R3is a -C2-C6alkynyl. In one embodiment, R3is a -C2-C5alkynyl. In one embodiment, R3is a -C2-C4alkynyl. In one embodiment, R3is a -C2-C3alkynyl.

[0183]

[0081] In embodiments, R4is selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl. In one embodiment, R4is -H. In one embodiment, R4is -Ci-C2oalkyl. In one embodiment, R4is -Ci-Cealkyl. In one embodiment, R4is a straight chain -Ci-C2oalkyl. In one embodiment, R4is a branched chain -Ci-C2oalkyl. In embodiments, R4is -Ci-C2oalkyl, -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci- Csalkyl, -Ci-C6alkyl, -Ci-Csalkyl, -Ci-C4alkyl, -Ci-C3alkyl, -Ci-C2alkyl, or -Cialkyl. In one embodiment, R4is a -Ci-C2oalkyl. In one embodiment, R4is a -Ci-Ci2alkyl. In one embodiment, R4is a -Ci-Cioalkyl. In one embodiment, R4is a -Ci-Csalkyl. In one embodiment, R4is a -Ci-Cealkyl. In one embodiment, R4is a -Ci-Csalkyl. In one embodiment, R4is a -Ci-C4alkyl. In one embodiment, R4is a -Ci-Csalkyl. In one embodiment, R4is a -Ci-Cialkyl. In one embodiment, R4is a -Ci alkyl. In one embodiment, R4is a straight chain -Ci-Cioalkcny I. In one embodiment, R4is a branched chain -Ci-Cioalkenyl. In embodiments, R4is -Ci-Cioalkenyl, -C2-Ci2alkenyl, -C2- Cioalkenyl, -C2-Csalkenyl, -C2-Cealkenyl, -C2-Csalkenyl, -C2-C4alkenyl, or -C2- Csalkenyl. In one embodiment, R4is a -C2-C2oalkenyl. In one embodiment, R4is a -C2- Cnalkenyl. In one embodiment, R4is a -C2-Cioalkenyl. In one embodiment, R4is a -C2- Csalkenyl. In one embodiment, R4is a -C2-C6alkenyl. In one embodiment, R4is a -C2- Csalkenyl. In one embodiment, R4is a -C2-C4alkenyl. In one embodiment, R4is a -C2- Csalkcnyl. In one embodiment, R4is a straight chain -C2-C2oalkynyl. In one embodiment, R4is a branched chain -C2-C2oalkynyl. In embodiments, R4is -C2-C2oalkynyl, -C2- Cnalkynyl, -C2-Cioalkynyl, -C2-Csalkynyl, -C2-Cealkynyl, -C2-Csalkynyl, -C2- C4alkynyl, or -C2-C3alkynyl. In one embodiment, R4is a -C2-C2oalkynyl. In one embodiment, R4is a -C2-Ci2alkynyl. In one embodiment, R4is a -C2-Cioalkynyl. In one embodiment, R4is a -C2-Csalkynyl. In one embodiment, R4is a -C2-C6alkynyl. In one embodiment, R4is a -C2-C5alkynyl. In one embodiment, R4is a -C2-C4alkynyl. In one embodiment, R4is a -C2-C3alkynyl.

[0184]

[0082] It will be appreciated that R3and R4are each independently selected, meaning R3and R4may be the same or otherwise different. In one embodiment, R3is - H and R4is -H. In one embodiment, R3is Ci-Cealkyl and R4is -H. In one embodiment, R3is Ci-Cealkyl and R4is Ci-Cealkyl. In one embodiment, R3is -H and R4is -C4alkyl. In one embodiment, R3is -H and R4is straight chain -C4alkyl.

[0185]

[0083] In embodiments, when R3is -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2- C2oalkynyl, the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-. Similarly, in embodiments, when R4is -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl, the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2- C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-. That is, the -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-2oalkynyl may each optionally include an ester moiety within the -Ci-C2oalkyl, -C2-C2oalkenyl or -C2-C2oalkynyl carbon chain. This ester moiety may be in either orientation (i.e., -(C=O)O- or -O(C=O)-). In one embedment, R4is a branched -Cnalkyl optionally interrupted with an ester, and is:

[0186]

[0084] In embodiments, R5and R6are each independently selected from the group consisting of -Ci-Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb.

[0187]

[0085] In embodiments, R5is selected from the group consisting of -Ci-Csoalkyl, - Ci-Csoalkenyl, Formula la, and Formula lb. In one embodiment, R5is a straight chain - Ci-Csoalkyl. In one embodiment, R5is a branched chain -Ci-Csoalkyl. In one embodiment, R5is a -Ci-C2oalkyl. In one embodiment, R5is a -Cio-C2oalkyl. In one embodiment, R5is a -Ci5-C2oalkyl. In one embodiment, R5is a -Cisalkyl. In one embodiment, R5is a straight chain -C2-C3oalkenyl. In one embodiment, R5is a branched chain -C2-C3oalkenyl. In one embodiment, R5is a -C2-C2oalkenyl. In one embodiment, R5is a -Cio-C2oalkenyl. In one embodiment, R5is a -Ci5-C2oalkenyl. In one embodiment, R5is a -Cisalkenyl.

[0188]

[0086] In embodiments, R6is selected from the group consisting of -Ci-Csoalkyl, - C2-C3oalkenyl, Formula la, and Formula lb. In one embodiment, R6is a straight chain - Ci-Csoalkyl. In one embodiment, R6is a branched chain -Ci-Csoalkyl. In one embodiment, R6is a -Ci-C2oalkyl. In one embodiment, R6is a -Cio-C2oalkyl. In one embodiment, R6is a -Ci5-C2oalkyl. In one embodiment, R6is a -Cisalkyl. In one embodiment, R6is a straight chain -C2-C3oalkenyl. In one embodiment, R6is a branched chain -C2-C3oalkenyl. In one embodiment, R6is a -C2-C2oalkenyl. In one embodiment, R6is a -Cio-C2oalkenyl. In one embodiment, R6is a -Ci5-C2oalkenyl. In one embodiment, R6is a -Cisalkenyl.

[0189]

[0087] It will be appreciated that R5and R6are each independently selected, meaning R5and R6may be the same or otherwise different. In one embodiment, R5is - Ci-Csoalkyl and R6is -Ci-Csoalkyl. In one embodiment, R5is -C2-C3oalkenyl and R6is - C2-C3oalkenyl. In one embodiment, R5is -Ci-Csoalkyl and R6is -C2-C3oalkenyl. In one embodiment, R5is -Ci-Csoalkyl and R6is Formula la. In one embodiment, R5is -C2- Csoalkenyl and R6is Formula la. In one embodiment, R5is -Ci-Csoalkyl and R6is Formula lb. In one embodiment, R5is -C2-C3oalkenyl and R6is Formula lb. In one embodiment, R5is Formula la and R6is Formula la. In one embodiment, R5is Formula lb and R6is Formula lb. In one embodiment, R5is Formual la and R6is Formula lb.

[0190] Formula la

[0191]

[0088] In embodiments, Formula la is:

[0192] Formula la; wherein the dashed line represents the point of attachment to Formula I.

[0193]

[0089] In embodiments, m is an integer from 0 to 6. The variable ‘m’ will be understood to indicate the number of repeating carbon atoms within the parentheses as depicted in the structure of Formula la. In embodiments, m is 0, 1, 2, 3, 4, 5, or 6. In one embodiment, m is 0. When m is 0, it will be appreciated that L1is directly bonded to the carbon from which R7and R8are substituted. In one embodiment, m is 0, and Formula la is:

[0194]

[0090] In one embodiment, m is 1. In one embodiment, m is 2. In one embodiment, m is 3. In one embodiment, m is 4. In one embodiment, m is 5. In one embodiment, m is 6. In embodiments, m is an integer from 0 to 6, or 0 to 5, or 0 to 4, or 0 to 3, or 0 to 2, or 0 to 1.

[0195]

[0091] In embodiments, L1is selected from -(C=O)O- and -O(C=O)-.

[0196]

[0092] In one embodiment, L1is -(C=O)O-, and Formula la is:

[0197]

[0093] In one embodiment, L1is -O(C=O)-, and Formula la is:

[0198]

[0094] In embodiments, Q1is -Ci-Ci2alkyl or -C2-Ci2alkenyl. In embodiments, Q1is straight chain -Ci-Ci2alkyl or straight chain -C2-Ci2alkenyl. In one embodiment, Q1is -Ci-Ci2alkyl. In embodiments, Q1is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci- Cealkyl, or -Ci-C4alkyl. In one embodiment, Q1is -Ci-Cioalkyl. In one embodiment, Q1is -Ci-Csalkyl. In one embodiment, Q1is -Ci-Cealkyl. In one embodiment, Q1is -Ci- Cualkyl. In one embodiment, Q1is -Ci-C?alkyl. In one embodiment, Q1is -C?alkyl, and Formula la is:

[0199]

[0095] In one embodiment, L1is -O(C=O)-, Q1is -C?alkyl, and Formula la is:

[0200]

[0096] In one embodiment, m is 0, L1is -O(C=O)-, Q1is -C?alkyl, and Formula la is:

[0201]

[0097] In embodiments, R7is -H or -Ci-Ci2alkyl. In one embodiment, R7is -H. In one embodiment, R7is -Ci-Ci2alkyl. In one embodiment, R7is a straight chain -Ci- Cnalkyl. In one embodiment, R7is a branched chain -Ci-Ci2alkyl. In embodiments, R7is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci-C6alkyl, -Ci-C4alkyl, or -Cialkyl. In one embodiment, R7is a -Ci-Cioalkyl. In one embodiment, R7is a -Ci-Csalkyl. In one embodiment, R7is a -Ci-Cealkyl. In one embodiment, R7is a -Ci-C4alkyl. In one embodiment, R7is a -C4alkyl.

[0098] It will be appreciated that a maximum of two R7substituents may be present in the compound of Formula I (i.e., when R5and R6are each Formula la). When more than one R7substituent is present, each R7substituent may be the same (e.g., both R7substituents are -C4alkyl), or otherwise each R7substituent may be different (e.g., one R7is -C4alkyl, and one R7is -H). Any combination of the same and different R7groups is contemplated in the present specification.

[0202]

[0099] In embodiments, R8is -H or -Ci-Ci2alkyl. In one embodiment, R8is -H. In one embodiment, R8is -Ci-Ci2alkyl. In one embodiment, R8is a straight chain -Ci- Cnalkyl. In one embodiment, R8is a branched chain -Ci-Ci2alkyl. In embodiments, R8is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci-C6alkyl, -Ci-C4alkyl, or -Cialkyl. In one embodiment, R8is a -Ci-Cioalkyl. In one embodiment, R8is a -Ci-Csalkyl. In one embodiment, R8is a -Ci-Cealkyl. In one embodiment, R8is a -Ci-C4alkyl. In one embodiment, R8is a -C4alkyl.

[0203]

[0100] Similarly, it will be appreciated that a maximum of two R8substituents may be present in the compound of Formula I (i.e., when R5and R6are each Formula la). When more than one R8substituent is present, each R8substituent may be the same (e.g., both R8substituents are -C4alkyl), or otherwise each R8substituent may be different (e.g., one R8is -C4alkyl, and one R8is -H). Any combination of the same and different R8groups is contemplated in the present specification.

[0204]

[0101] In one embodiment, R7is -C4alkyl, R8is -C4alkyl, and Formula la is:

[0205]

[0102] In one embodiment, m is 0, L1is -O(C=O)-, R7is -C4alkyl, R8is -C4alkyl, and Formula la is:

[0206]

[0103] In one embodiment, m is 0, L1is -O(C=O)-, Q1is -C?alkyl, R7is -C4alkyl, R8is -C4 alkyl, and Formula la is:

[0207] Formula lb

[0208]

[0104] In embodiments, Formula lb is:

[0209] Formula lb; wherein the dashed line represents the point of attachment to Formula I.

[0210]

[0105] In embodiments, p is an integer from 1 to 6. The variable ‘p’ will be understood to indicate the number of repeating carbon atoms within the parentheses as depicted in the structure of Formula lb. In embodiments, p is 1, 2, 3, 4, 5, or 6. In one embodiment, p is 1. In one embodiment, p is 2. In one embodiment, p is 3. In one embodiment, p is 4. In one embodiment, p is 5. In one embodiment, p is 6. In embodiments, p is an integer from 1 to 6, or 1 to 5, or 1 to 4, or 1 to 3, or 1 to 2.

[0211]

[0106] In embodiments, q is an integer from 1 to 6. The variable ‘q’ will be understood to indicate the number of repeating carbon atoms within the parentheses as depicted in the structure of Formula lb. In embodiments, q is 1, 2, 3, 4, 5, or 6. In one embodiment, q is 1. In one embodiment, q is 2. In one embodiment, q is 3. In one embodiment, q is 4. In one embodiment, q is 5. In one embodiment, q is 6. In embodiments, q is an integer from 1 to 6, or 1 to 5, or 1 to 4, or 1 to 3, or 1 to 2.

[0212]

[0107] In embodiments, L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-.

[0213]

[0108] In one embodiment, L2is -(C=O)O-, and Formula lb is:

[0109] In one embodiment, L2is -O(C=O)-, and Formula lb is:

[0214]

[0110] In one embodiment, L3is -(C=O)O-, and Formula lb is:

[0215]

[0111] In one embodiment, L3is -O(C=O)-, and Formula lb is:

[0216]

[0112] In one embodiment, L4is -(C=O)O-, and Formula lb is:

[0217]

[0113] In one embodiment, L4is -O(C=O)-, and Formula lb is:

[0218]

[0114] In embodiments, Q2is -Ci-Ci2alkyl or -C2-Ci2alkenyl. In embodiments, Q2is straight chain -Ci-Ci2alkyl or straight chain -C2-Ci2alkenyl. In one embodiment, Q2is -Ci-Ci2alkyl. In embodiments, Q2is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci- Cealkyl, or -Ci-C4alkyl. In one embodiment, Q2is -Ci-Cioalkyl. In one embodiment, Q2is -Ci-Csalkyl. In one embodiment, Q2is -Ci-Cealkyl. In one embodiment, Q2is -Ci- C4alkyl. In one embodiment, Q2is -Ci-C4alkyl. In one embodiment, Q2is -Cialkyl, and Formula lb is:

[0219]

[0115] In one embodiment, L2is -O(C=O)-, Q2is -C2alkyl, and Formula lb is:

[0220]

[0116] In one embodiment, p is 1, q is 1, L2is -O(C=O)-, Q2is -Cialkyl, and

[0221] Formula lb is:

[0222]

[0117] In one embodiment, p is 1, q is 1, L2is -O(C=O)-, Q2is -C2alkyl, L3is - (C=O)O-, L4is -(C=O)O-, and Formula lb is:

[0223]

[0118] In embodiments, R9is -H or -Ci-Ci2alkyl. In one embodiment, R9is -H. In one embodiment, R9is -Ci-Ci2alkyl. In one embodiment, R9is a straight chain -Ci- Cnalkyl. In one embodiment, R9is a branched chain -Ci-Ci2alkyl. In embodiments, R9is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci-C6alkyl, or -Ci-C4alkyl. In one embodiment, R9is a -Ci-Cioalkyl. In one embodiment, R9is a -Ci-Csalkyl. In one embodiment, R9is a -Ci-Cealkyl. In one embodiment, R9is a -Ci-C4alkyl. In one embodiment, R9is a -Csalkyl.

[0224]

[0119] It will be appreciated that a maximum of two R9substituents may be present in the compound of Formula I (i.e., when R5and R6are each Formula lb). When more than one R9substituent is present, each R9substituent may be the same (e.g., both R9substituents are -Csalkyl), or otherwise each R9substituent may be different (e.g., one R9is -Csalkyl, and one R9is -H). Any combination of the same and different R9groups is contemplated in the present specification.

[0225]

[0120] In embodiments, R10is -H or -Ci-Ci2alkyl. In one embodiment, R10is -H. In one embodiment, R10is -Ci-Ci2alkyl. In one embodiment, R10is a straight chain -Ci- Cnalkyl. In one embodiment, R10is a branched chain -Ci-Ci2alkyl. In embodiments, R10is -Ci-Ci2alkyl, -Ci-Cioalkyl, -Ci-Csalkyl, -Ci-C6alkyl, or -Ci-C4alkyl. In one embodiment, R10is a -Ci-Cioalkyl. In one embodiment, R10is a -Ci-Csalkyl. In one embodiment, R10is a -Ci-Cealkyl. In one embodiment, R10is a -Ci-C4alkyl. In one embodiment, R10is a -Csalkyl.

[0226]

[0121] It will be appreciated that a maximum of two R10substituents may be present in the compound of Formula I (i.e., when R5and R6are each Formula lb). When more than one R10substituent is present, each R10substituent may be the same (e.g., both R10substituents are -Csalkyl), or otherwise each R10substituent may be different (e.g., one R10is -Csalkyl, and one R10is -H). Any combination of the same and different R10groups is contemplated in the present specification.

[0227] Compounds of Formula I

[0228]

[0122] It will be appreciated that a compound of Formula I may comprise any combination of variables, being n, R1, R2, R3, R4, R5, R6, m, p, q, L1, L2, L3, L4, Q1, Q2, R7, R8, R9, and R10, as defined herein.

[0229]

[0123] In embodiments, R5is Formula la, and the compound is a compound of

[0230] Formula III:

[0231] Formula III.

[0232]

[0124] In embodiments, R5is Formula la, L1is -O(C=O)-, and the compound is a compound of Formula Illa:

[0233] Formula Illa.

[0234]

[0125] In embodiments, R5is Formula la, L1is -O(C=O)-, n is 3, and the compound is a compound of Formula Illb :

[0235] Formula Illb.

[0236]

[0126] In embodiments, R5is Formula la, L1is -O(C=O)-, n is 3, m is 0, and the compound is a compound of Formula IIIc:

[0237]

[0238] Formula IIIc.

[0239]

[0127] In embodiments, R5is Formula la, L1is -O(C=O)-, n is 3, m is 0, R3is -H,

[0240] R4is -C4alkyl, and the compound is a compound of Formula Hid:

[0241] Formula Illd.

[0242]

[0128] In embodiments, R5is Formula la, L1is -O(C=O)-, n is 3, m is 0, R3is -H, R4is -C4alkyl, R1is -Cialkyl, R2is -Cialkyl, and the compound is a compound of Formula Ille:

[0243] Formula Ille.

[0129] In embodiments, R5is Formula la, L1is -O(C=O)-, n is 3, m is 0, R3is -H, R4is -C4alkyl, R1is -Cialkyl, R2is -Cialkyl, Q1is -C?alkyl, and the compound is a compound of Formula Ulf :

[0244] Formula Illf.

[0245]

[0130] In embodiments, R5is Formula lb, and the compound is a compound of

[0246] Formula IV :

[0247] Formula IV.

[0248]

[0131] In embodiments, R5is Formula lb, L2is -O(C=O)-, and the compound is a compound of Formula IVa:

[0249] Formula IVa.

[0132] In embodiments, R5is Formula lb, L2is -O(C=O)-, n is 3, and the compound is a compound of Formula IVb:

[0250]

[0133] In embodiments, R5is Formula lb, L2is -O(C=O)-, n is 3, p is 1, q is 1, and the compound is a compound of Formula IVc:

[0251] Formula IVc.

[0252]

[0134] In embodiments, R5is Formula lb, R6is Formula lb, L2is -O(C=O)-, n is 3, d is a compound of Formula IVd.

[0253]

[0135] In embodiments, R5is Formula lb, R6is Formula lb, L2is -O(C=O)-, n is 3, p is 1, q is 1, L3is -(C=O)O-, L4is -(C=O)O-, R3is -H, R4is -C4alkyl, and the compound is a compound of Formula IVe:

[0254] Formula IVe.

[0255]

[0136] In embodiments, R5is Formula lb, R6is Formula lb, L2is -O(C=O)-, n is 3, p is 1, q is 1, L3is -(C=O)O-, L4is -(C=O)O-, R3is -H, R4is -C4alkyl, R1is -Cialkyl, R2is -Cialkyl, and the compound is a compound of Formula IVf:

[0256] Formula IVf.

[0257]

[0137] In embodiments, R5is Formula lb, R6is Formula lb, L2is -O(C=O)-, n is 3, Cialkyl, R2is -Cialkyl, Q2-Cialkyl, is and the compound is a compound of Formula IVg:

[0258]

[0259] Formula IVg.

[0260]

[0138] In embodiments, R5is Formula la and R6is Formula la, and the compound is a compound of Formula V :

[0261] Formula V.

[0262]

[0139] In embodiments, R5is Formula la and R6is Formula lb, and the compound is a compound of Formula VI:

[0263] Formula VI.

[0140] In embodiments, R5is Formula lb and R6is Formula lb, and the compound is a compound of Formula VII:

[0264] Formula VII.

[0265]

[0141] In one embodiment, the compound of Formula I is selected from the group consisting of:

[0266]

[0267]

[0268]

[0269] Lipid Nanoparticles

[0270]

[0142] The present disclosure provides for an LNP for delivery of a polynucleotide, such as an RNA, wherein the LNP comprises a compound of the present disclosure.

[0143] In embodiments, the LNPs have a mean diameter of from about 30 nm to about 160 nm, from about 40 nm to about 160 nm, from about 50 nm to about 160 nm, from about 60 nm to about 160 nm, from about 70 nm to about 160 nm, from about 50 nm to about 140 nm, from about 60 nm to about 130 nm, from about 70 nm to about 120 nm, from about 80 nm to about 120 nm, from about 90 nm to about 120 nm, from about 70 to about 110 nm, from about 80 nm to about 110 nm, or about 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, 105 nm, 110 nm, 115 nm, 120 nm, 125 nm, 130 nm, 135 nm, 140 nm, 145 nm, 150 nm, 155 nm or 160 nm. The diameter of the LNP may be measured by dynamic light scattering (DLS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), or other methods such as are known in the art.

[0271]

[0144] In some embodiments, the LNPs may be relatively homogenous. A polydispersity index may be used to indicate the homogeneity of the LNPs. A small, for example less than 0.3 or less than 0.2, polydispersity index generally indicates a narrow particle size distribution. A composition of the LNPs described herein may have a polydispersity index from about 0 to about 0.25, such as 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, or 0.25. In some embodiments, the polydispersity index of the LNP composition may be from about 0 to about 0.20 or 0.05 to 0.20.

[0272]

[0145] The LNP may comprise more than one compound of Formula I or LA to I- N or ILA to ILN, as appropriate. The inclusion of more than one such compound may, for example, be employed to achieve a desired pKa profile.

[0273]

[0146] The LNP may comprise a compound of Formula I and an additional cationic and / or ionizable lipid, for example a cationic and / or ionizable lipid comprising a cyclic or non-cyclic amine. Such additional cationic and / or ionizable lipids may be selected from the non-limiting group consisting of:

[0274] 3-(didodecylamino)-Nl,Nl,4-tridodecyl-l-piperazineethanamine (KL10), Nl-[2-

[0275] (didodecylamino)ethyl]-Nl,N4,N4-tridodecyl-l,4-piperazinediethanamine (KL22), 14,25-ditridecyl-15,18,21,24-tetraaza-octatriacontane (KL25), l,2-dilinoleyloxy-N,N- dimethylaminopropane (DLin-DMA), 2,2-dilinoleyl-4-dimethylaminomethyl- [1,3]- dioxolane (DLin-K-DMA), (6Z,9Z,28Z,31Z)-heptatriacont-6,9,28,31-tetraene- 19-yl 4- (dimethylamino)butanoate (DLin-MC3-DMA), 2,2-dilinoleyl-4-(2- dimethylaminoethyl)- [1,3] -dioxolane (DLin-KC2-DMA) , 1 ,2-dioleyloxy-N,N- dimethylaminopropane (DODMA), 2-({ 8-[(3P)-cholest-5-en-3-yloxy]octyl]oxy)-N,N- dimethyl-3-[(9Z,12Z)-octadeca-9,12-dien-l-y loxy]propan-l -amine (Octyl-CLinDMA), (2R)-2-({8-[(3P)-cholest-5-en-3-yloxy]octyl]oxy)-N,N-dimethyl-3-[(9Z,12Z)- octadeca-9,12-die n-l-yloxy]propan-l -amine (Octyl-CLinDMA (2R)), (2S)-2-({ 8-[(3P)- cholest-5-en-3-yloxy]octyl]oxy)-N,N-dimethyl-3-[(9Z,12Z)-octadeca-9,12-die n-1- yloxy]propan-l -amine (Octyl-CLinDMA (2S)), ((4-hydroxybutyl)azanediyl)bis(hexane- 6, l-diyl)bis(2-hexyldecanoate)) and 8-[(2-hydroxyethyl)[6-oxo-6-

[0276] (undecyloxy)hexyl] amino] -octanoic acid, 1-octylnonyl ester.

[0277]

[0147] In embodiments, the LNP additionally comprises one or more of a PEG- lipid, a sterol structural lipid and / or a neutral lipid.

[0278] PEGylated lipids

[0279]

[0148] In one embodiment, the present disclosure provides an LNP comprising a compound of the present disclosure and a PEGylated lipid.

[0280]

[0149] It will be apparent to the skilled person that reference to a PEGylated lipid is a lipid that has been modified with polyethylene glycol. Exemplary PEGylated lipids include, but are not limited to, PEG-modified phosphatidylethanolamines, PEG-modified phosphatidic acids, PEG-modified ceramides, PEG-modified dialkylamines, PEG- modified diacylglycerols, and PEG-modified dialkylglycerols. For embodiment, a PEG lipid includes PEG-c-DOMG, PEG-DMG, PEG-DLPE, PEG-DMPE, PEG-DPPC, a PEG-DSPE lipid and combinations thereof.

[0281] Neutral lipids

[0282]

[0150] In one embodiment, the present disclosure provides an LNP comprising a compound of the present disclosure and a neutral lipid.

[0283]

[0151] Suitable neutral or zwitterionic lipids for use in the present disclosure will be apparent to the skilled person and include, in embodiments, 1,2-distearoyl-sn-glycero- 3 -phosphocholine (DSPC), l,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE), 1.2-dilinoleoyl- sn-glycero-3 -phosphocholine (DLPC) , 1 ,2-dimyristoyl- sn-glycero- phosphocholine (DMPC), l,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), 1,2- dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-diundecanoyl-sn-glycero- phosphocholine (DUPC), l-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC),

[0284] 1.2-di-O-octadecenyl-sn-glycero-3-phosphocholine (18:0 Diether PC), l-oleoyl-2- cholesterylhemisuccinoyl-sn-glycero-3-phosphocholine (OChemsPC), 1-hexadecyl-sn- glycero-3-phosphocholine (C16 Lyso PC), l,2-dilinolenoyl-sn-glycero-3- phosphocholine, 1 ,2-diarachidonoyl-sn-glycero-3-phosphocholine, 1 ,2- didocosahexaenoyl-sn-glycero-3-phosphocholine, l,2-diphytanoyl-sn-glycero-3- phosphoethanolamine (ME 16.0 PE), l,2-distearoyl-sn-glycero-3-phosphoethanolamine,

[0285] 1.2-dilinoleoyl-sn-glycero-3-phosphoethanolamine, l,2-dilinolenoyl-sn-glycero-3- phosphoethanolamine, 1 ,2-diarachidonoyl-sn-glycero-3-phosphoethanolamine, 1 ,2- didocosahexaenoyl-sn-glycero-3-phosphoethanolamine, l,2-dioleoyl-sn-glycero-3- phospho-rac-(l -glycerol) sodium salt (DOPG), and sphingomyelin. The lipids can be saturated or unsaturated.

[0286] Structural lipids

[0287]

[0152] In one embodiment, the present disclosure provides an LNP comprising a compound of the present disclosure and a structural lipid.

[0288]

[0153] Exemplary structural lipids include, but are not limited to, cholesterol fecosterol, sitosterol, campesterol, stigmasterol, brassicasterol, ergosterol, tomatidine, tomatine, ursolic acid and alpha-tocopherol.

[0289]

[0154] In one embodiment, the structural lipid is a sterol. In embodiments, the structural lipid is cholesterol. In another embodiment, the structural lipid is campesterol.

[0290]

[0155] In embodiments, the LNPs comprise an ionizable cationic lipid compound of the present disclosure; a neutral lipid; a sterol such as cholesterol; and a PEGylated lipid. The LNPs are formulated with a polynucleotide to be delivered to a subject. Polynucleotides

[0291]

[0156] The compounds of the present disclosure may form complexes with, and so be formulated into LNPs with, a range of polynucleotides including, but not limited to, mRNA, siRNA, antisense oligonucleotide, plasmid DNA, microRNA (miRNA), miRNA inhibitors (antagomirs / antimirs), messenger-RNA-interfering complementary RNA (micRNA), DNA, multivalent RNA, dicer substrate RNA, complementary DNA (cDNA), and the like. In this manner the LNPs and compositions may, in some embodiments, be used to induce expression of a desired protein both in vitro and in vivo by contacting cells with an LNP comprising one or more novel compounds of the present disclosure, wherein the LNP encapsulates or is associated with a polynucleotide that is expressed to produce the desired protein, such as a mRNA or plasmid encoding the desired protein. In alternative embodiments, the LNPs and compositions may be used to decrease the expression of target genes and proteins in vitro or in vivo by contacting cells with an LNP comprising one or more novel compounds of the present disclosure, wherein the LNP encapsulates or is associated with a polynucleotide that reduces target gene expression, such as an antisense oligonucleotide or siRNA.

[0292]

[0157] Therefore, in some embodiments, the polynucleotide is an mRNA encoding a polypeptide of interest, including any naturally or non-naturally occurring or otherwise modified polypeptide. A polypeptide encoded by an mRNA may be of any size and may have any secondary structure or activity. In some embodiments, a polypeptide encoded by an mRNA may have a therapeutic effect when expressed in a cell.

[0293]

[0158] In other embodiments, the polynucleotide is a siRNA capable of selectively knocking down or down regulating expression of a gene of interest. For example, an siRNA could be selected to silence a gene associated with a particular disease, disorder, or condition upon administration to a subject in need thereof of an LNP composition comprising the siRNA. A siRNA may comprise a sequence that is complementary to an mRNA sequence that encodes a gene or protein of interest. In some embodiments, the siRNA may be an immunomodulatory siRNA.

[0294]

[0159] In some embodiments, the polynucleotide is a shRNA or a vector or plasmid encoding the same. A shRNA may be produced inside a target cell upon delivery of an appropriate construct to the nucleus. Constructs and mechanisms relating to shRNA are well-known in the relevant arts.

[0295]

[0160] Polynucleotides useful for formulation with the LNPs incorporating an ionizable cationic compound of the present disclosure may include a first region of linked nucleosides encoding a polypeptide of interest (e.g., a coding region), a first flanking region located at the 5'-terminus of the first region (e.g., a 5'-UTR), a second flanking region located at the 3'-terminus of the first region (e.g., a 3'-UTR), at least one 5'-cap region, and a 3 '-stabilizing region. In some embodiments, a polynucleotide further includes a poly-A region or a Kozak sequence (e.g., in the 5'-UTR). In some cases, polynucleotides may contain one or more intronic sequences capable of being excised from the polynucleotide. In some embodiments, a polynucleotide (e.g., an mRNA) may include a 5' cap structure, a chain terminating nucleotide, a stem loop, a poly A sequence, and / or a polyadenylation signal. Any one of the regions of a polynucleotide may include one or more alternative components (e.g., an alternative nucleoside). For example, the 3 '-stabilizing region may contain an alternative nucleoside such as an L-nucleoside, an inverted thymidine, or a 2'-O-methyl nucleoside and / or the coding region, 5'-UTR, 3'- UTR, or cap region may include an alternative nucleoside such as a 5-substituted uridine (e.g., 5-methoxy uridine), a 1-substituted pseudouridine (e.g., 1-methyl-pseudouridine or 1-ethyl-pseudouridine), and / or a 5-substituted cytidine (e.g., 5-methyl-cytidine).

[0296]

[0161] An exemplary polynucleotides useful for formulation with the LNPs incorporating an ionizable cationic compound of the present disclosure include a first region of linked nucleosides encoding an antigenic polypeptide, a first flanking region located at the 5'-terminus of the first region (e.g., a 5'-UTR), a second flanking region located at the 3'-terminus of the first region (e.g., a 3'-UTR), at least one 5'-cap region, and a 3'-stabilizing region.

[0297]

[0162] Polynucleotides suitable for use with the present LNPs may include one or more naturally occurring components, including any of the canonical nucleotides A (adenosine), G (guanosine), C (cytosine), U (uridine), or T (thymidine). In one embodiment, all or substantially all of the nucleotides comprising (a) the 5'-UTR, (b) the open reading frame (ORF), (c) the 3'-UTR, (d) the poly A tail, and any combination of (a, b, c, or d above) comprise naturally occurring canonical nucleotides A (adenosine), G (guanosine), C (cytosine), U (uridine), or T (thymidine).

[0298]

[0163] In some embodiments, polynucleotides may include one or more alternative components, as described herein, which impart useful properties including increased stability and / or the lack of a substantial induction of the innate immune response of a cell into which the polynucleotide is introduced. For example, an alternative polynucleotide exhibits reduced degradation in a cell into which the polynucleotide is introduced, relative to a corresponding unaltered polynucleotide. These alternative species may enhance the efficiency of protein production, intracellular retention of the polynucleotides, and / or viability of contacted cells, as well as possess reduced immunogenicity .

[0299]

[0164] Polynucleotides may be naturally or non-naturally occurring. Polynucleotides may include one or more modified (e.g., altered or alternative) nucleobases, nucleosides, nucleotides, or combinations thereof. The polynucleotides may include any useful modification or alteration, such as to the nucleobase, the sugar, or the internucleoside linkage (e.g., to a linking phosphate / to a phosphodiester linkage / to the phosphodiester backbone). In some embodiments, one or more alterations are present in each of the nucleobase, the sugar, and the internucleoside linkage.

[0300]

[0165] Polynucleotides may or may not be uniformly altered along the entire length of the molecule. For example, one or more or all types of nucleotide (e.g., purine or pyrimidine, or any one or more or all of A, G, U, C) may or may not be uniformly altered in a polynucleotide, or in a given predetermined sequence region thereof.

[0301]

[0166] Different sugar alterations and / or internucleoside linkages (e.g., backbone structures) may exist at various positions in a polynucleotide. One of ordinary skill in the art will appreciate that the nucleotide analogs or other alteration(s) may be located at any position(s) of a polynucleotide such that the function of the polynucleotide is not substantially decreased. An alteration may also be a 5'- or 3 '-terminal alteration. In some embodiments, the polynucleotide includes an alteration at the 3'-terminus. Nucleobase alternatives

[0302]

[0167] The alternative nucleosides and nucleotides can include an alternative nucleobase. A nucleobase of a polynucleotide is an organic base such as a purine or pyrimidine or a derivative thereof. A nucleobase may be a canonical base (e.g., adenine, guanine, uracil, thymine, and cytosine). These nucleobases can be altered or wholly replaced to provide polynucleotide molecules having enhanced properties, e.g., increased stability such as resistance to nucleases. Non-canonical or modified bases may include, for example, one or more substitutions or modifications including but not limited to alkyl, aryl, halo, oxo, hydroxyl, alkyloxy, and / or thio substitutions; one or more fused or open rings; oxidation; and / or reduction.

[0303]

[0168] Alternative nucleotide base pairing encompasses not only the standard adenine-thymine, adenine-uracil, or guanine-cytosine base pairs, but also base pairs formed between nucleotides and / or alternative nucleotides including non-standard or alternative bases, wherein the arrangement of hydrogen bond donors and hydrogen bond acceptors permits hydrogen bonding between a non-standard base and a standard base or between two complementary non-standard base structures. One example of such non- standard base pairing is the base pairing between the alternative nucleotide inosine and adenine, cytosine, or uracil.

[0304]

[0169] In some embodiments, the nucleobase is an alternative uracil. Exemplary nucleobases and nucleosides having an alternative uracil include pseudouridine (y), pyridin-4-one ribonucleoside, 5-aza-uracil, 6-aza-uracil, 2-thio-5-aza-uracil, 2-thio- uracil (s2U), 4-thio-uracil (s4U), 4-thio-pseudouridine, 2-thio-pseudouridine, 5- hydroxy-uracil (ho5U), 5-aminoallyl-uracil, 5-halo-uracil (e.g., 5-iodo-uracil or 5- bromo-uracil), 3-methyl-uracil (m3U), 5 -methoxy-uracil (mo5U), uracil 5-oxyacetic acid (cmo5U), uracil 5-oxyacetic acid methyl ester (mcmo5U), 5-carboxymethyl-uracil (cm5U), 1-carboxymethyl-pseudouridine, 5-carboxyhydroxymethyl-uracil (chm5U), 5- carboxyhydroxymethyl-uracil methyl ester (mchm5U), 5-methoxycarbonylmethyl- uracil (mcm5U), 5-methoxycarbonylmethyl-2-thio-uracil (mcm5s2U), 5-aminomethyl- 2-thio-uracil (nm5s2U), 5-methylaminomethyl-uracil (mnm5U), 5-methylaminomethyl- 2-thio-uracil (mnm5s2U), 5-methylaminomethyl-2-seleno-uracil (mnm5se2U), 5- carbamoylmethyl-uracil (ncm5U), 5-carboxymethylaminomethyl-uracil (cmnm5U), 5- carboxymethylaminomethyl-2-thio-uracil (cmnm5s2U), 5-propynyl-uracil, 1-propynyl- pseudouracil, 5-taurinomethyl-uracil (rm5U), 1-taurinomethyl-pseudouridine, 5- taurinomethyl-2-thio-uracil(rm5s2U), 1 -taurinomethyl-4-thio-pseudouridine, 5-methyl- uracil (m5U, i.e., having the nucleobase deoxy thy mine), 1-methyl-pseudouridine (m y),

[0305] 1-ethyl-pseudouridine (Etly), 5-methyl-2-thio-uracil (m5s2U), 1 -methyl-4-thio- pseudouridine (mls4\| / ), 4-thio- 1-methyl-pseudouridine, 3-methyl-pseudouridine (m3y),

[0306] 2-thio- 1-methyl-pseudouridine, 1 -methyl- 1-deaza-pseudouridine, 2-thio- 1 -methyl- 1- deaza-pseudouridine, dihydrouracil (D), dihydropseudouridine, 5,6-dihydrouracil, 5- methyl-dihydrouracil (m5D), 2-thio-dihydrouracil, 2-thio-dihydropseudouridine, 2- methoxy-uracil, 2-methoxy-4-thio-uracil, 4-methoxy-pseudouridine, 4-methoxy-2-thio- pseudouridine, Nl-methyl-pseudouridine, 3-(3-amino-3-carboxypropyl)uracil (acp3U),

[0307] 1-methyl-3-(3-amino-3-carboxypropyl)pseudouridine (acp3 y), 5-

[0308] (isopentenylaminomethyl)uracil (inm5U), 5-(isopentenylaminomethyl)-2-thio-uracil (inm5s2U), 5,2'-O-dimethyl-uridine (m5Um), 2-thio-2'-O_methyl-uridine (s2Um), 5- methoxycarbonylmethyl-2'-O-methyl-uridine (mcm5Um), 5-carbamoylmethyl-2'-O- methyl-uridine (ncm5Um), 5-carboxymethylaminomethyl-2'-O-methyl-uridine (cmnm5Um), 3,2'-O-dimethyl-uridine (m3Um), and 5-(isopentenylaminomethyl)-2'-O- methyl-uridine (inm5Um), 1 -thio-uracil, deoxythymidine, 5-(2-carbomethoxyvinyl)- uracil, 5-(carbamoylhydroxymethyl)-uracil, 5-carbamoylmethyl-2-thio-uracil, 5- carboxymethyl-2-thio-uracil, 5-cyanomethyl-uracil, 5-methoxy-2-thio-uracil, and 5-[3- (l-E-propenylamino)]uracil. In one example, the modified uracil is pseudouridine. In one example, the modified uracil is Nl-methyl-pseudouridine.

[0309]

[0170] In some embodiments, the nucleobase is an alternative cytosine. Exemplary nucleobases and nucleosides having an alternative cytosine include 5-aza-cytosine, 6- aza-cytosine, pseudoisocytidine, 3-methyl-cytosine (m3C), N4-acetyl-cytosine (ac4C), 5-formyl-cytosine (f5C), N4-methyl-cytosine (m4C), 5-methyl-cytosine (m5C), 5-halo- cytosine (e.g., 5-iodo-cytosine), 5-hydroxymethyl-cytosine (hm5C), 1-methyl- pseudoisocytidine, pyrrolo-cytosine, pyrrolo-pseudoisocytidine, 2-thio-cytosine (s2C),

[0310] 2-thio-5-methyl-cytosine, 4-thio-pseudoisocy tidine, 4-thio- 1-methyl-pseudoisocytidine,

[0311] 4-thio- 1 -methyl- 1 -deaza-pseudoisocytidine, 1 -methyl- 1 -deaza-pseudoisocytidine, zebularine, 5-aza-zebularine, 5-methyl-zebularine, 5-aza-2-thio-zebularine, 2-thio- zebularine, 2-methoxy-cytosine, 2-methoxy-5-methyl-cytosine, 4-methoxy- pseudoisocytidine, 4-methoxy-l-methyl-pseudoisocytidine, lysidine (k2C), 5,2'-O- dimethyl-cytidine (m5Cm), N4-acetyl-2'-O-methyl-cytidine (ac4Cm), N4,2'-O- dimethyl-cytidine (m4Cm), 5-formyl-2'-O-methyl-cytidine (f5Cm), N4,N4,2'-O- trimethyl-cytidine (m42Cm), 1 -thio-cytosine, 5-hydroxy-cytosine, 5-(3-azidopropyl)- cytosine, and 5-(2-azidoethyl)-cytosine. In one example, the modified cytosine is 5- methyl-cytosine.

[0312]

[0171] In some embodiments, the nucleobase is an alternative adenine. Exemplary nucleobases and nucleosides having an alternative adenine include 2-amino-purine, 2,6- diaminopurine, 2-amino-6-halo-purine (e.g., 2-amino-6-chloro-purine), 6-halo-purine (e.g., 6-chloro-purine), 2-amino-6-methyl-purine, 8-azido-adenine, 7-deaza- adenine, 7- deaza-8-aza-adenine, 7-deaza-2-amino-purine, 7-deaza-8-aza-2-amino-purine, 7-deaza- 2,6-diaminopurine, 7-deaza-8-aza-2,6-diaminopurine, 1-methyl-adenine (mlA), 2- methyl- adenine (m2A), N6-methyl-adenine (m6A), 2-methylthio-N6-methyl-adenine (ms2m6A), N6-isopentenyl-adenine (i6A), 2-methylthio-N6-isopentenyl-adenine (ms2i6A), N6-(cis-hydroxyisopentenyl)adenine (io6A), 2-methylthio-N6-(cis- hydroxyisopentenyl)adenine (ms2io6A), N6-glycinylcarbamoyl-adenine (g6A), N6- threonylcarbamoyl-adenine (t6A), N6-methyl-N6-threonylcarbamoyl-adenine (m6t6A), 2-methylthio-N6-threonylcarbamoyl-adenine (ms2g6A), N6,N6-dimethyl-adenine (m62A), N6-hydroxynorvalylcarbamoyl-adenine (hn6A), 2-methylthio-N6- hydroxynorvalylcarbamoyl-adenine (ms2hn6A), N6-acetyl-adenine (ac6A), 7-methyl- adenine, 2-methylthio-adenine, 2-methoxy-adenine, N6,2'-O-dimethyl-adenosine (m6Am), N6,N6,2'-O-trimethyl-adenosine (m62Am), l,2'-O-dimethyl-adenosine (mlAm), 2-amino-N6-methyl-purine, 1 -thio-adenine, 8-azido-adenine, N6-(19-amino- pentaoxanonadecyl)-adenine, 2,8-dimethyl-adenine, N6-formyl-adenine, and N6- hydroxymethyl-adenine.

[0313]

[0172] In some embodiments, the nucleobase is an alternative guanine. Exemplary nucleobases and nucleosides having an alternative guanine include inosine (I), 1 -methyl- inosine (mil), wyosine (imG), methylwyosine (mimG), 4 -demethyl- wyo sine (imG-14), isowyosine (imG2), wybutosine (yW), peroxywybutosine (o2yW), hydroxywybutosine (OHyW), undermodified hydroxywybutosine (OHyW*), 7-deaza-guanine, queuosine (Q), epoxy queue sine (oQ), galactosyl-queuosine (galQ), mannosyl-queuosine (manQ),

[0314] 7-cyano-7-deaza-guanine (preQO), 7-aminomethyl-7-deaza-guanine (preQi), archaeosine (G+), 7-deaza-8-aza-guanine, 6-thio-guanine, 6-thio-7-deaza-guanine, 6- thio-7-deaza-8-aza-guanine, 7-methyl-guanine (m7G), 6- thio-7-methyl-guanine, 7- methyl-inosine, 6-methoxy-guanine, 1-methyl-guanine (mlG), N2-methyl-guanine (m2G), N2,N2-dimethyl-guanine (m22G), N2,7-dimethyl-guanine (m2,7G), N2, N2,7- dimethyl-guanine (m2,2,7G), 8-oxo-guanine, 7-methyl-8-oxo-guanine, l-methyl-6-thio- guanine, N2-methyl-6-thio-guanine, N2,N2-dimethyl-6-thio-guanine, N2-methyl-2'-O- methyl-guanosine (m2Gm), N2,N2-dimethyl-2'-O-methyl-guanosine (m22Gm), 1- methyl-2'-O-methyl-guanosine (mlGm), N2,7-dimethyl-2'-O-methyl-guanosine (m2,7Gm), 2'-O-methyl-inosine (Im), l,2'-O-dimethyl-inosine (mllm), 1-thio-guanine, and O-6-methyl-guanine.

[0315]

[0173] The alternative nucleobase of a nucleotide can be independently a purine, a pyrimidine, a purine analog, or a pyrimidine analog. For example, the nucleobase can be an alternative to adenine, cytosine, guanine, uracil, or hypoxanthine. In another embodiment, the nucleobase can also include, for example, naturally-occurring and synthetic derivatives of a base, including pyrazolo[3,4-d]pyrimidines, 5 -methylcytosine (5-me-C), 5 -hydroxymethyl cytosine, xanthine, hypoxanthine, 2-aminoadenine, 6- methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 2-thiouracil, 2-thiothymine and 2-thiocytosine, 5- propynyl uracil and cytosine, 6-azo uracil, cytosine and thymine, 5-uracil (pseudouracil), 4-thiouracil, 8-halo (e.g., 8-bromo), 8-amino, 8-thiol, 8-thioalkyl, 8-hydroxy and other

[0316] 8-substituted adenines and guanines, 5-halo particularly 5-bromo, 5-trifiuoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine and 7-methyladenine, 8- azaguanine and 8-azaadenine, deazaguanine, 7-deazaguanine, 3-deazaguanine, deazaadenine, 7- deazaadenine, 3 -deazaadenine, pyrazolo[3,4-d]pyrimidine, imidazo[l,5-a] 1,3,5 triazinones, 9-deazapurines, imidazo[4,5-d]pyrazines, thiazolo[4,5- d]pyrimidines, pyrazin-2-ones, 1,2,4-triazine, pyridazine; or 1,3,5 triazine.

[0317]

[0174] Polynucleotides for formulation with LNPs comprising a compound of the present disclosure may be prepared according to any available technique known in the art. mRNA may be prepared by, for example, enzymatic synthesis which provides a process of template-directed synthesis of RNA molecules from an engineered DNA template comprised of an upstream bacteriophage promoter sequence linked to a downstream sequence encoding the gene of interest. Template DNA can be prepared for in vitro transcription from a number of sources with appropriate techniques which are well-known in the art including, but not limited to, plasmid DNA and polymerase chain reaction amplification (see Linpinsel, J.L and Conn, G.L., General protocols for preparation of plasmid DNA template and Bowman, J.C., Azizi, B., Lenz, T.K., Ray, P., and Williams, L.D. in RNA in vitro transcription and RNA purification by denaturing PAGE in Recombinant and in vitro RNA syntheses Methods v. 941 Conn G.L. (ed), New York, N.Y. Humana Press, 2012)

[0318]

[0175] Transcription of the RNA occurs in vitro using the linearized DNA template in the presence of the corresponding RNA polymerase and adenosine, guanosine, uridine and cytidine ribonucleoside triphosphates (rNTPs) under conditions that support polymerase activity while minimizing potential degradation of the resultant mRNA transcripts. In vitro transcription can be performed using a variety of commercially available kits including, but not limited to RiboMax Large Scale RNA Production System (Promega), MegaScript Transcription kits (Life Technologies) as well as with commercially available reagents including RNA polymerases and rNTPs. The methodology for in vitro transcription of mRNA is well-known in the art. (see, e.g. Losick, R., 1972, In vitro transcription, Ann Rev Biochem v.41 409-46; Kamakaka, R. T. and Kraus, W. L. 2001. In Vitro Transcription. Current Protocols in Cell Biology. 2: 11.6: 11.6.1-11.6.17; Beckert, B. And Masquida, B., (2010) Synthesis of RNA by In Vitro Transcription in RNA in Methods in Molecular Biology v. 703 (Neilson, H. Ed), New York, N.Y. Humana Press, 2010; Brunelle, J.L. and Green, R., 2013, Chapter Five - In vitro transcription from plasmid or PCR-amplified DNA, Methods in Enzymology v. 530, 101-114; all of which are incorporated herein by reference).

[0319]

[0176] The desired in vitro transcribed mRNA is then purified from the undesired components of the transcription or associated reactions. Techniques for the isolation of the mRNA transcripts are well known in the art and include phenol / chloroform extraction or precipitation with either alcohol in the presence of monovalent cations or lithium chloride. Lipid Nanoparticle Formation

[0320]

[0177] LNPs comprising a compound of the present disclosure can be made using approaches which are well-known in the art of formulation. For example, suitable LNPs can be formed using mixing processes such as microfluidics, including herringbone micromixing, and T-junction mixing of two fluid streams, one of which contains the polynucleotide, typically in an aqueous solution, and the other of which has the various required lipid components, typically in ethanol.

[0321]

[0178] The LNPs may then be prepared by combining a compound of Formula I, a phospholipid (such as DOPE or DSPC, which may be purchased from commercial sources including Avanti Polar Lipids, Alabaster, AL), a PEGylated lipid (such as 1,2- dimyristoyl-sn-glycerol methoxypoly ethylene glycol, also known as PEG-DMG, which may be purchased from commercial sources including Avanti Polar Lipids, Alabaster, AL), and a structural lipid / sterol (such as cholesterol, which may be purchased from commercial sources including Sigma- Aldrich), at concentrations of, for example, about 50 mM in ethanol. Solutions should be refrigerated during storage at, for example, -20° C. The various lipids may be combined to yield the desired molar ratios and diluted with water and ethanol to a final desired lipid concentration of, for example, between about 5.5 mM and about 25 mM.

[0322]

[0179] An LNP composition comprising a polynucleotide is prepared (as set out in the examples) by combining the above lipid solution with a solution including the polynucleotide at, for example, a lipid component to polynucleotide wt:wt ratio from about 5: 1 to about 50: 1. The lipid solution may be rapidly injected using a Knauer Nanoscaler at flow rates between about 3 ml / min and about 18 ml / min into the polynucleotide solution to produce a suspension with a water to ethanol ratio between about 1: 1 and about 4: 1, or between about 2: 1 and about 4: 1.

[0323]

[0180] For LNP compositions including a RNA, solutions of the RNA at concentrations of 1.0 mg / ml in deionized water may be diluted in 50 mM sodium citrate buffer at a pH between 3 and 6 to form a stock solution.

[0181] LNP compositions may be further processed, as is known in the art, in one example by 10-fold dilution into 50 mM citrate buffer at pH 6 and subjected to tangential flow filtration (TFF) using a 300k molecular weight cut-off membrane (mPES) until concentrated to the original volume. Subsequently, the citrate buffer may be replaced with a buffer containing 20 mM Tris buffer at pH 7.5, 80 mM sodium chloride, and 3% sucrose using diafiltration with a 10-fold volume of the new buffer. The LNP solution may be concentrated to a volume of between 5-10 mL, filtered using a 0.2 micron PES syringe filter, aliquoted into vials, and frozen at l°C / min using a Coming® CoolCell® LX Cell Freezing Container until the samples reach -80°C. Samples may be stored at - 80°C until required.

[0324]

[0182] The method described above induces nano -precipitation and particle formation. Alternative processes including, but not limited to, T-junction and direct injection, may be used to achieve the same nano-precipitation.

[0325]

[0183] In some embodiments, the lipid component of the LNP formulation comprises about 25 mol % to about 60 mol % compound of Formula I, about 2 mol % to about 25 mol % phospholipid (neutral lipid), about 18.5 mol % to about 60 mol % structural lipid (sterol), and about 0.2 mol % to about 10 mol % of PEGylated lipid, provided that the total mol % does not exceed 100%. In some embodiments, the lipid component of the LNP formulation comprises about 30 mol % to about 50 mol % compound of Formula I, about 5 mol % to about 20 mol % phospholipid, about 30 mol % to about 55 mol % structural lipid, and about 1 mol % to about 5 mol % of PEGylated lipid. In a particular embodiment, the lipid component includes about 40 mol % compound of the present disclosure, about 10 mol % phospholipid, about 48 mol % structural lipid, and about 2.0 mol % of PEG lipid. In some embodiments, the phospholipid may be DOPE or DSPC. In other embodiments, the PEG lipid may be PEG- DMG and / or the structural lipid may be cholesterol.

[0326]

[0184] The efficiency of encapsulation of the polynucleotide within the LNPs comprising a compound of the present disclosure may be at least 50%, for example about 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%. In some embodiments, the encapsulation efficiency may be at least 80%. In certain embodiments, the encapsulation efficiency may be at least 90%. Lipid Nanoparticle Compositions

[0327]

[0185] The LNPs comprising a compound of the present disclosure and a polynucleotide can be formulated for administration via any accepted mode of administration of lipid particles including LNPs, liposomes, lipid vesicles and like lipid- based particles. The pharmaceutical compositions of the invention may be formulated into preparations in solid, semi-solid, liquid or gaseous forms, such as tablets, capsules, powders, granules, ointments, solutions, suspensions, suppositories, injections, inhalants, gels, microspheres, and aerosols. Typical routes of administering such pharmaceutical LNP compositions include, without limitation, oral, topical, transdermal, inhalation, parenteral, sublingual, buccal, rectal, vaginal, and intranasal. The term parenteral as used herein includes subcutaneous injections, intravenous, intramuscular, intradermal, intrasternal injection or infusion techniques. The compositions administered to a subject may be in the form of one or more dosage units, where for example, a tablet or injectable liquid volume may be a single dosage unit. Actual methods of preparing such dosage forms are known, or will be apparent, to those skilled in this art; for example, see Remington: The Science and Practice of Pharmacy, 20th Edition (Philadelphia College of Pharmacy and Science, 2000).

[0328]

[0186] Therefore, one embodiment of the present disclosure provides a composition (such as a pharmaceutical composition) comprising an LNP, which comprises a compound of the present disclosure, combined with a pharmaceutically acceptable carrier.

[0329]

[0187] In general terms, by “carrier” is meant a solid or liquid fdler, binder, diluent, encapsulating substance, emulsifier, wetting agent, solvent, suspending agent, coating or lubricant that may be safely administered to any subject, e.g., a human. Depending upon the particular route of administration, a variety of acceptable carriers, known in the art may be used, as for embodiment described in Remington's Pharmaceutical Sciences (Mack Publishing Co. N.J. USA, 1991).

[0330]

[0188] An LNP is useful for parenteral, topical, oral, or local administration, intramuscular administration, aerosol administration, or transdermal administration, for prophylactic or for therapeutic treatment. In one embodiment, the LNP is administered parenterally, such as intramuscularly, subcutaneously or intravenously. In some embodiments, the LNP is administered intramuscularly.

[0331]

[0189] Formulation of LNPs to be administered will vary according to the route of administration and formulation (e.g., solution, emulsion, capsule) selected. An appropriate pharmaceutical composition comprising an LNP to be administered can be prepared in a physiologically acceptable carrier. For solutions or emulsions, suitable carriers include, for embodiment, aqueous or alcoholic / aqueous solutions, emulsions or suspensions, including saline and buffered media. Parenteral vehicles can include sodium chloride solution, Ringer's dextrose, dextrose and sodium chloride, lactated Ringer's or fixed oils. A variety of appropriate aqueous carriers are known to the skilled artisan, including water, buffered water, buffered saline, polyols (e.g., glycerol, propylene glycol, liquid polyethylene glycol), dextrose solution and glycine. Intravenous vehicles can include various additives, preservatives, or fluid, nutrient or electrolyte replenishers (See, generally, Remington's Pharmaceutical Science, 16th Edition, Mack, Ed. 1980). The compositions can optionally contain pharmaceutically acceptable auxiliary substances as required to approximate physiological conditions such as pH adjusting and buffering agents and toxicity adjusting agents, for embodiment, sodium acetate, sodium chloride, potassium chloride, calcium chloride and sodium lactate. The LNPs can be stored in the liquid stage or can be lyophilized for storage and reconstituted in a suitable carrier prior to use according to art-known lyophilization and reconstitution techniques.

[0332]

[0190] When the LNP composition is a vaccine composition then the carrier may be water, typically pyrogen-free water; isotonic saline or buffered (aqueous) solutions, e.g., phosphate, citrate etc. buffered solutions. For injection of an LNP vaccine composition, water or preferably a buffer, more preferably an aqueous buffer, may be used, containing a sodium salt, preferably at least 50mM of a sodium salt, a calcium salt, preferably at least O.OlmM of a calcium salt, and optionally a potassium salt, such as at least 3mM of a potassium salt. In an embodiment, the sodium, calcium and, optionally, potassium salts may be present as their chlorides, iodides, or bromides, or in the form of their hydroxides, carbonates, hydrogen carbonates, or sulfates, etc. Non-limiting examples of sodium salts include e.g. NaCl, Nal, NaBr, NaiCCh, NaHCCh, NaiSCk, examples of the optional potassium salts include e.g. KC1, KI, KBr, K2CO3, KHCO3, K2SO4, and examples of calcium salts include e.g. CaCh, Cab, CaBn, CaCCh, CaSCL, Ca(0H)2. Furthermore, organic anions of the aforementioned cations may be contained in the buffer. In certain embodiments, the buffer suitable for injection purposes, may contain salts selected from sodium chloride (NaCl), calcium chloride (CaCh) and optionally potassium chloride (KC1), wherein further anions may be present additional to the chlorides. In embodiments, the salts in the injection buffer are present in a concentration of at least 50mM sodium chloride (NaCl), at least 3mM potassium chloride (KC1) and at least O.OlmM calcium chloride (CaC12). The injection buffer may be hypertonic, isotonic or hypotonic with reference to the specific reference medium.

[0333]

[0191] In some embodiments of a vaccine, one or more compatible solid or liquid fillers or diluents or encapsulating compounds may be employed which are suitable for administration to a person. Pharmaceutically acceptable carriers, fillers and diluents will have sufficiently high purity and sufficiently low toxicity to make them suitable for administration to a subject. Some examples of compounds which can be used as pharmaceutically acceptable carriers, fillers or constituents thereof are sugars, such as, for example, lactose, glucose, trehalose and sucrose; starches, such as, for example, corn starch or potato starch; dextrose; cellulose and its derivatives, such as, for example, sodium carboxymethylcellulose, ethylcellulose, cellulose acetate; powdered tragacanth; malt; gelatin; tallow; solid glidants, such as, for example, stearic acid, magnesium stearate; calcium sulfate; vegetable oils, such as, for example, groundnut oil, cottonseed oil, sesame oil, olive oil, corn oil and oil from theobroma; polyols, such as, for example, polypropylene glycol, glycerol, sorbitol, mannitol and polyethylene glycol; and alginic acid.

[0334]

[0192] When the LNP composition is a vaccine composition it may further comprise one or more pharmaceutically acceptable adjuvants to enhance the immuno stimulatory properties of the composition. The adjuvant may be any compound, which is suitable to support administration and delivery of the LNP composition and which may initiate or increase an immune response of the innate immune system, i.e. a non-specific immune response.

[0193] Such an adjuvant may be selected from any adjuvant known to a skilled person and suitable for the particular nature of the vaccine, i.e. for induction of a suitable immune response in a mammal. In embodiments, the adjuvant may be selected from the group consisting of: MF59® (squalene-water emulsion), TDM, MDP, muramyl dipeptide, pluronics, alum solution, aluminium hydroxide, ADJUMER™ (polyphosphazene); aluminium phosphate gel; glucans from algae; algammulin; aluminium hydroxide gel (alum); highly protein-adsorbing aluminium hydroxide gel; low viscosity aluminium hydroxide gel; AF or SPT (emulsion of squalane (5%), Tween 80 (0.2%), Pluronic L121 (1.25%), phosphate-buffered saline, pH 7.4); AVRIDINE™ (propanediamine); BAY R1005™ ((N-(2-deoxy-2-L-leucylamino-b-D-glucopyranosyl)- N-octadecyl-dodecanoyl-amide hydroacetate); CALCITRIOL™ (l-alpha,25-dihydroxy- vitamin D3); calcium phosphate gel; CAP™ (calcium phosphate nanoparticles); cholera holotoxin, cholera-toxin-Al-protein-A-D-fragment fusion protein, sub-unit B of the cholera toxin; CRL 1005 (block copolymer P1205); cytokine-containing liposomes; DDA (dimethyldioctadecylammonium bromide); DHEA (dehydroepiandrosterone); DMPC (dimyristoylphosphatidylcholine); DMPG (dimyristoylphosphatidylglycerol); DOC / alum complex (deoxycholic acid sodium salt); Freund's complete adjuvant; Freund's incomplete adjuvant; gamma inulin; Gerbu adjuvant (mixture of: i) N- acetylglucosaminyl-(Pl-4)-N-acetylmuramyl-L-alanyl-D-glutamine (GMDP), ii) dimethyldioctadecylammonium chloride (DDA), iii) zinc-L-proline salt complex (ZnPro-8); GM-CSF); GMDP (N-acetylglucosaminyl-(bl-4)-N-acetylmuramyl-L- alanyl-D-isoglutamine); imiquimod (l-(2-methypropyl)-lH-imidazo[4,5-c]quinoline-4- amine); ImmTher™ (N-acetylglucosaminyl-N-acetylmuramyl-L-Ala-D-isoGlu-L- Ala- glycerol dipalmitate); DRVs (immunoliposomes prepared from dehydration-rehydration vesicles); interferon-gamma; interleukin-lbeta; interleukin-2; interleukin-7; interleukin- 12; ISCOMS™; ISCOPREP 7.0.3.™; liposomes; LOXORIBINE™ (7-allyl-8- oxoguanosine); LT oral adjuvant (E.coli labile enterotoxin-protoxin); microspheres and microparticles of any composition;; MONTANIDE ISA 51™ (purified incomplete Freund's adjuvant); MONTANIDE ISA 720™ (metabolisable oil adjuvant); MPL™ (3- Q-desacyl-4'-monophosphoryl lipid A); MTP-PE and MTP-PE liposomes ((N-acetyl-L- alanyl-D-isoglutaminyl-L-alanine-2-(l,2-dipalmitoyl-sn-glycero-3- (hydroxyphosphoryloxy))-ethylamide, monosodium salt); MURAMETIDE™ (Nac- Mur-L-Ala-D-Gln-OCH3); MURAPALMITINE™ and D-MURAPALMITINE™ (Nac- Mur-L-Thr-D-isoGIn-sn-glyceroldipalmitoyl); NAGO (neuraminidase-galactose oxidase); nanospheres or nanoparticles of any composition; NISVs (non-ionic surfactant vesicles); PLEURAN™ (P-glucan); PLGA, PGA and PLA (homo- and co-polymers of lactic acid and glycolic acid; microspheres / nanospheres); PLURONIC L121™; PMMA (polymethyl methacrylate); PODDS™ (proteinoid microspheres); polyethylene carbamate derivatives; poly-rA: poly-rU (polyadenylic acid-polyuridylic acid complex); polysorbate 80 (Tween 80); protein cochleates (Avanti Polar Lipids, Inc., Alabaster, AL); STIMULON™ (QS-21); Quil-A (Quil-A saponin); S-28463 (4-amino-otec-dimethyl-2- ethoxymethyl-lH-imidazo[4,5 c]quinoline-l-ethanol); SAF-1™ ("Syntex adjuvant formulation"); Sendai proteoliposomes and Sendai-containing lipid matrices; Span-85 (sorbitan trioleate); Speed (emulsion of Marcol 52, Span 85 and Tween 85); squalene or Robane® (2,6,10,15,19,23-hexamethyltetracosan and 2,6,10,15,19,23-hexamethyl- 2,6,10,14,18,22-tetracosahexane); stearyltyrosine (octadecyltyrosine hydrochloride); Theramid® (N-acetylglucosaminyl-N-acetylmuramyl-L-Ala-D-isoGlu-L-Ala- dipalmitoxypropylamide); Theronyl-MDP (Termurtide™ or [thrl]-MDP; N- acetylmuramyl-L-threonyl-D-isoglutamine); Ty particles (Ty-VLPs or virus-like particles); Walter-Reed liposomes (liposomes containing lipid A adsorbed on aluminium hydroxide), and lipopeptides, including Pam3Cys, in particular aluminium salts, such as Adju-phos, Alhydrogel, Rehydragel; emulsions, including CFA, SAF, IFA, MF59, Provax, TiterMax, Montanide, Vaxfectin; copolymers, including Optivax (CRL1005), L121, Poloaxmer4010), etc.; liposomes, including Stealth, cochleates, including BIORAL; plant derived adjuvants, including QS21, Quil A, Iscomatrix, ISCOM; adjuvants suitable for costimulation including Tomatine, biopolymers, including PLG, PMM, Inulin; microbe derived adjuvants, including Romurtide, DETOX, MPL, CWS, Mannose, CpG polynucleotide sequences, CpG7909, ligands of human TLR 1-10, ligands of murine TLR 1-13, ISS-1018, IC31, Imidazoquinolines, Ampligen, Ribi529, IMOxine, IRIVs, VLPs, cholera toxin, heat-labile toxin, Pam3Cys, Flagellin, GPI anchor, LNFPIIFLewis X, antimicrobial peptides, UC-1V150, RSV fusion protein, cdiGMP; and adjuvants suitable as antagonists including CGRP neuropeptide. In one preferred example the adjuvant may be the oil-in-water emulsion adjuvant MF59®, particularly if the vaccine is an influenza vaccine.

[0335]

[0194] Upon formulation, compositions of the present disclosure will be administered in a manner compatible with the dosage formulation and in such amount as is therapeutically / prophylactically effective. The dosage ranges for the administration of the LNPs are those large enough to produce the desired effect. For embodiment, the composition comprises an effective amount of the encapsulated or associated RNA, e.g., the mRNA or self-replicating RNA. In one embodiment, the composition comprises a therapeutically effective amount of the RNA. In another embodiment, the composition comprises a prophylactically effective amount of the RNA.

[0336]

[0195] The dosage should not be so large as to cause adverse side effects. Generally, the dosage will vary with the age, condition, sex and extent of the disease in the patient and can be determined by one of skill in the art. The dosage can be adjusted by the individual physician in the event of any complication.

[0337]

[0196] Preparation methods for the above compounds and compositions are described further herein and / or are known in the art.

[0338] Methods of Treatment and Producing a Polypeptide of Interest

[0339]

[0197] Diseases, disorders, and / or conditions which may be a result of or related to aberrant protein or polypeptide may be treated by the present LNPs comprising a compound of the present disclosure and a polynucleotide and may include, but are not limited to, rare diseases, infectious diseases, cancer and proliferative diseases, genetic diseases, autoimmune diseases, diabetes, neurodegenerative diseases, cardio- and reno- vascular diseases, and metabolic diseases.

[0340]

[0198] LNP compositions may be formulated in unit dosage form. The therapeutically effective or prophylactically effective dose for any particular patient will depend upon a variety of factors including the severity and identify of a disorder being treated; the specific composition employed; the age, body weight, general health, sex, and diet of the patient; the time of administration, route of administration, and rate of excretion of the specific pharmaceutical composition employed; the duration of the treatment; drugs used in combination or coincidental with the specific pharmaceutical composition employed; and like factors well known in the medical arts.

[0341]

[0199] LNP compositions described herein may be used in combination with one or more other therapeutic, prophylactic, diagnostic, or imaging agents. They may be administered together in a single composition or administered separately in different compositions.

[0342]

[0200] The present disclosure provides methods of producing a polypeptide of interest in a mammalian cell. Methods of producing polypeptides involve contacting a cell with an LNP composition, as described herein, including an mRNA encoding the polypeptide of interest. Upon contacting the cell with the LNP composition, the mRNA may be taken up and translated in the cell to produce the polypeptide of interest.

[0343]

[0201] The step of contacting an LNP composition including an mRNA with a cell may involve or cause transfection. A phospholipid including in the lipid component of the LNP composition may facilitate transfection and / or increase transfection efficiency, for example, by interacting and / or fusing with a cellular or intracellular membrane. Transfection may allow for the translation of the mRNA within the cell.

[0344]

[0202] In some embodiments, the LNP compositions described herein may be used therapeutically. For example, an mRNA included in the LNP composition may encode a therapeutic polypeptide (e.g., in a translatable region) and produce the therapeutic polypeptide upon contacting and / or entry (e.g., transfection) into a cell. In other embodiments, an mRNA included in the LNP composition may encode a polypeptide that may improve or increase the immunity of a subject.

[0345]

[0203] In embodiments, an mRNA included in an LNP composition may encode a recombinant polypeptide that may replace one or more polypeptides that may be substantially absent in a cell contacted with the LNP composition. The one or more substantially absent polypeptides may be lacking due to a genetic mutation of the encoding gene or a regulatory pathway thereof. Alternatively, a recombinant polypeptide produced by translation of the mRNA may antagonize the activity of an endogenous protein present in, on the surface of, or secreted from the cell. An antagonistic recombinant polypeptide may be desirable to combat deleterious effects caused by activities of the endogenous protein, such as altered activities or localization caused by mutation. In another alternative, a recombinant polypeptide produced by translation of the mRNA may indirectly or directly antagonize the activity of a biological moiety present in, on the surface of, or secreted from the cell. Antagonized biological moieties may include, but are not limited to, lipids (e.g., cholesterol), lipoproteins (e.g., low density lipoprotein), nucleic acids, carbohydrates, and small molecule toxins. Recombinant polypeptides produced by translation of the mRNA may be engineered for localization within the cell, such as within a specific compartment such as the nucleus, or may be engineered for secretion from the cell or for translocation to the plasma membrane of the cell.

[0346]

[0204] In some embodiments, contacting a cell with an LNP composition including an mRNA may reduce the innate immune response of a cell to an exogenous polynucleotide. A cell may be contacted with a first LNP composition including a first amount of a first exogenous mRNA including a translatable region and the level of the innate immune response of the cell to the first exogenous mRNA may be determined. Subsequently, the cell may be contacted with a second LNP composition including a second amount of the first exogenous mRNA, the second amount being a lesser amount of the first exogenous mRNA compared to the first amount. Alternatively, the second composition may include a first amount of a second exogenous mRNA that is different from the first exogenous mRNA. The steps of contacting the cell with the first and second LNP compositions may be repeated one or more times. Additionally, efficiency of polypeptide production (e.g., translation) in the cell may be optionally determined, and the cell may be re-contacted with the first and / or second composition repeatedly until a target protein production efficiency is achieved.

[0347]

[0205] In some embodiments, the present disclosure provides for the use of the LNPs comprising a compound of the present disclosure and a polynucleotide in the manufacture of a medicament for the treatment of a disease, disorder or condition. The disease, disorder or condition may be as described in any one or more embodiments herein.

[0206] The medicament may be for the prevention or treatment of a cancer, an infectious disease, an allergy, or an autoimmune disease. In embodiments, the medicament is a vaccine. The vaccine may be a tumor vaccine, an influenza vaccine, or a SARS-CoV-2 vaccine.

[0348] Use of LNPs in a Vaccine

[0349]

[0207] In some embodiments, the LNP comprising a compound of the present disclosure and a polynucleotide may be a component of a vaccine. Vaccines include compounds and preparations that are capable of providing immunity against one or more conditions related to infectious diseases and so may include mRNAs encoding infectious disease derived antigens and / or epitopes. Vaccines also include compounds and preparations that direct an immune response against cancer cells and can include mRNAs encoding tumor cell derived antigens, epitopes, and / or neoepitopes. Compounds eliciting immune responses may include vaccines, corticosteroids (e.g., dexamethasone), and other species.

[0350]

[0208] In embodiments, the vaccine may be an mRNA vaccine and so the LNP comprising a compound of the present disclosure encapsulates or is associated with an mRNA molecule which comprises an mRNA sequence encoding an antigenic peptide or protein, or a fragment, variant or derivative thereof.

[0351]

[0209] The antigenic peptides or proteins may be pathogenic antigens, tumor antigens, allergenic antigens or autoimmune self-antigens. Such pathogenic antigens may be those derived from pathogenic organisms, in particular bacterial, viral or protozoologic al (multicellular) pathogenic organisms, which evoke an immunological reaction in a mammalian subject, such as a human. Pathogenic antigens may be surface antigens, for example proteins or fragments thereof, located at the surface of the virus or the bacterial or protozoological organism.

[0352]

[0210] Pathogenic antigens of interest may include those derived from one or more of: Acinetobacter baumannii, Anaplasma genus, Anaplasma phagocytophilum, Ancylostoma braziliense, Ancylostoma duodenale, Area nobacteri urn haemolyticum, Ascaris lumbricoides, Aspergillus genus, Astroviridae, Babesia genus, Bacillus anthracis, Bacillus cercus, Bartonella henselae, BK virus, Blastocysts hominis, Blastomyces dermatitidis, Bordetella pertussis, Borrelia burgdorferi, Borrelia genus, Borrelia spp, Brucella genus, Brugia malayi, Bunyaviridae family, Burkholderia cepacia and other Burkholderia species, Burkholderia mallei, Burkholderia pseudomallei, Caliciviridae family, Campylobacter genus, Candida albicans, Candida spp, Chlamydia trachomatis, Chlamydophila pneumoniae, Chlamydophila psittaci, QD prion, Clonorchis sinensis, Clostridium botulinum, Clostridium difficile, Clostridium perfringens, Clostridium perfringens, Clostridium spp, Clostridium tetani, Coccidioides spp, coronavi ruses, Corynebacterium diphtheriae, Coxiella burnetii, Crimean-Congo hemorrhagic fever virus, Cryptococcus neoformans, Cryptosporidium genus, Cytomegalovirus (CMV), Dengue viruses (DEN-1, DEN-2, DEN-3 and DEN-4), Dientamoeba fragilis, Ebolavirus (EBOV), Echinococcus genus, Ehrlichia chaffeensis, Ehrlichia ewingii, Ehrlichia genus, Entamoeba histolytica, Enterococcus genus, Enterovirus genus, Enteroviruses, mainly Coxsackie A virus and Enterovirus 71 (EV71), Epidermophyton spp, Epstein-Barr Virus (EBV), Escherichia coli 0157:H7, 011 1 and 0104: H4, Fasciola hepatica and Fasciola gigantica, FFI prion, Filarioidea superfamily, Flaviviruses, Francisella tularensis, Fusobacterium genus, Geotrichum candidum, Giardia intestinalis, Gnathostoma spp, GSS prion, Guanarito virus, Haemophilus ducreyi, Haemophilus influenzae, Helicobacter pylori, Henipavirus (Hendra virus Nipah virus), Hepatitis A Virus, Hepatitis B Virus (HBV), Hepatitis C Virus (HCV), Hepatitis D Virus, Hepatitis E Virus, Herpes simplex virus 1 and 2 (HSV-1 and HSV-2), Histoplasma capsulatum, HIV (Human immunodeficiency virus), Hortaea werneckii, Human bocavirus (HBoV), Human herpesvirus 6 (HHV-6) and Human herpesvirus 7 (HHV-7), Human metapneumo virus (hMPV), Human papillomavirus (HPV), Human parainfluenza viruses (HPIV), Japanese encephalitis virus, JC virus, Junin virus, Kingella kingae, Klebsiella granulomatis, Kuru prion, Lassa virus, Legionella pneumophila, Leishmania genus, Leptospira genus, Listeria monocytogenes, Lymphocytic choriomeningitis virus (LCMV), Machupo virus, Malassezia spp, Marburg virus, Measles virus, Metagonimus yokagawai, Microsporidia phylum, Molluscum contagiosum virus (MCV), Mumps virus, Mycobacterium leprae and Mycobacterium lepromatosis, Mycobacterium tuberculosis, Mycobacterium ulcerans, Mycoplasma pneumoniae, Naegleria fowleri, Necator americanus, Neisseria gonorrhoeae, Neisseria meningitidis, Nocardia asteroides, Nocardia spp, Onchocerca volvulus, Orientia tsutsugamushi, Orthomyxoviridae family (Influenza), Paracoccidioides brasiliensis, Paragonimus spp, Paragonimus westermani, Parvovirus B19, Pasteurella genus, Plasmodium genus, Pneumocystis jirovecii, Poliovirus, Rabies virus, Respiratory syncytial virus (RSV), Rhinovirus, rhinoviruses, Rickettsia akari, Rickettsia genus, Rickettsia prowazekii, Rickettsia rickettsii, Rickettsia typhi, Rift Valley fever virus, Rotavirus, Rubella virus, Sabia virus, Salmonella genus, Sarcoptes scabiei, SARS coronavirus, Schistosoma genus, Shigella genus, Sin Nombre virus, Hantavirus, Sporothrix schenckii, Staphylococcus genus, Staphylococcus genus, Streptococcus agalactiae, Streptococcus pneumoniae, Streptococcus pyogenes, Strongyloides stercoralis, Taenia genus, Taenia solium, Tick-borne encephalitis virus (TBEV), Toxocara canis or Toxocara cati, Toxoplasma gondii, Treponema pallidum, Trichinella spiralis, Trichomonas vaginalis, Trichophyton spp, Trichuris trichiura, Trypanosoma brucei, Trypanosoma cruzi, Ureaplasma urealyticum, Varicella zoster virus (VZV), Varicella zoster virus (VZV), Variola major or Variola minor, vCJD prion, Venezuelan equine encephalitis virus, Vibrio cholerae, West Nile virus, Western equine encephalitis virus, Wuchereria bancrofti, Yellow fever virus, Yersinia enterocolitica, Yersinia pestis, and Yersinia pseudotuberculosis.

[0353]

[0211] In certain embodiments, relevant antigens may be derived from the pathogens selected from: Severe Acute Respiratory Syndrome (SARS), Severe Acute Respiratory Syndrome Coronavirus and Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-1 and SARS-CoV-2), Influenza virus, respiratory syncytial virus (RSV), Herpes simplex virus (HSV), human Papilloma virus (HPV), Human immunodeficiency virus (HIV), Plasmodium, Staphylococcus aureus, Dengue virus, Chlamydia trachomatis, Cytomegalovirus (CMV), Hepatitis B virus (HBV), Mycobacterium tuberculosis, Rabies virus, and Yellow Fever Virus.

[0354]

[0212] In some embodiments, the relevant pathogenic antigen may be selected from: Outer membrane protein A OmpA, biofilm associated protein Bap, transport protein MucK (Acinetobacter baumannii, Acinetobacter infections)); variable surface glycoprotein VSG, microtubule-associated protein MAPP15, trans- sialidase TSA (Trypanosoma brucei, African sleeping sickness (African trypanosomiasis)); HIV p24 antigen, HIV envelope proteins (Gpl20, Gp41, Gpl60), polyprotein GAG, negative factor protein Nef, trans-activator of transcription Tat (HIV (Human immunodeficiency virus), AIDS (Acquired immunodeficiency syndrome)); galactose-inhibitable adherence protein GIAP, 29 kDa antigen Eh29, Gal / GalNAc lectin, protein CRT, 125 kDa immunodominant antigen, protein M17, adhesin ADH112, protein STIRP (Entamoeba histolytica, Amoebiasis); Major surface proteins 1-5 (MSPla, MSPlb, MSP2, MSP3, MSP4, MSP5), type IV secreotion system proteins (VirB2, VirB7, VirBll, VirD4) (Anaplasma genus, Anaplasmosis); protective Antigen PA, edema factor EF, lethal facotor LF, the S-layer homology proteins SLH (Bacillus anthracis, Anthrax); acranolysin, phospholipase D, collagen-binding protein CbpA (Area nobacteri urn haemolyticum, Area nobacteri urn haemolyticum infection); nucleocapsid protein NP, glycoprotein precursor GPC, glycoprotein GP1, glycoprotein GP2 (Junin virus, Argentine hemorrhagic fever); chitin-protein layer proteins, 14 kDa suarface antigen A14, major sperm protein MSP, MSP polymerization -organizing protein MPOP, MSP fiber protein 2 MFP2, MSP polymerization -activating kinase MPAK, ABA-l-like protein ALB, protein ABA-1, cuticulin CUT-1 (Ascaris lumbricoides, Ascariasis); 41 kDa allergen Asp vl3, allergen Asp f3, major conidial surface protein rodlet A, protease Peplp, GPI-anchored protein Gellp, GPLanchored protein Crflp (Aspergillus genus, Aspergillosis); family VP26 protein, VP29 protein (Astroviridae, Astrovirus infection); Rhoptry-associated protein 1 RAP-1, merozoite surface antigens MSA-1, MSA-2 (al, a2, b, c), 12D3, 11C5, 21B4, P29, variant erythrocyte surface antigen VESA1, Apical Membrane Antigen 1 AMA-1 (Babesia genus, Babesiosis); hemolysin, enterotoxin C, PX01-51, glycolate oxidase, ABC-transporter, penicillin -binding protein, zinc transporter family protein, pseudouridine synthase Rsu, plasmid replication protein RepX, oligoendopeptidase F, prophage membrane protein, protein HemK, flagellar antigen H, 28.5-kDa cell surface antigen (Bacillus cereus, Bacillus cereus infection); large T antigen LT, small T antigen, capsid protein VP1, capsid protein VP2 (BK virus, BK virus infection); 29 kDa-protein, caspase-3-like antigens, glycoproteins (Blastocysts hominis, Blastocystis hominis infection); yeast surface adhesin WL1 (Blastomyces dermatitidis, Blastomycosis); nucleoprotein N, polymerase L, matrix protein Z, glycoprotein GP (Machupo virus, Bolivian hemorrhagic fever); outer surface protein A OspA, outer surface protein OspB, outer surface protein OspC, decorin binding protein A DbpA, decorin binding protein B DbpB, flagellar filament 41 kDa core protein Fla, basic membrane protein A precursor BmpA (Immunodominant antigen P39), outer surface 22 kDa lipoprotein precursor (antigen IPLA7), variable surface lipoprotein vlsE (Borrelia genus, Borrelia infection); Botulinum neurotoxins BoNT / Al, BoNT / A2, BoNT / A3, BoNT / B, BoNT / C, BoNT / D, BoNT / E, BoNT / F, BoNT / G, recombinant botulinum toxin F He domain FHc (Clostridium botulinum, Botulism (and Infant botulism)); nucleocapsid, glycoprotein precursor (Sabia virus, Brazilian hemorrhagic fever); copper / Zinc superoxide dismutase SodC, bacterioferritin Bfr, 50S ribosomal protein RpIL, OmpA-like transmembrane domain-containing protein 0mp31, immunogenic 39-kDa protein M5 P39, zinc ABC transporter periplasmic zinc-bnding protein znuA, periplasmic immunogenic protein Bp26, 30S ribosomal protein S12 RpsL, glyceraldehyde- 3 -phosphate dehydrogenase Gap, 25 kDa outer-membrane immunogenic protein precursor Omp25, invasion protein B lalB, trigger factor Tig, molecular chaperone DnaK, putative peptidyl-prolyl cis-trans isomerase SurA, lipoprotein 0mpl9, outer membrane protein MotY 0mpl6, conserved outer membrane protein DI 5, malate dehydrogenase Mdh, component of the Type-IV secretion system (T4SS) VirJ, lipoprotein of unknown function BAB l_0187 (Brucella genus, Brucellosis); members of the ABC transporter family (LolC, OppA, and PotF), putative lipoprotein releasing system transmembrane protein LolC / E, flagellin FliC, Burkholderia intracellular motility A BimA, bacterial Elongation factor-Tu EF-Tu, 17 kDa OmpA-like protein, boaA coding protein, boaB coding protein (Burkholderia cepacia and other Burkholderia species, Burkholderia infection); mycolyl -transferase Ag85A, heat-shock protein Hsp65, protein TB10.4, 19 kDa antigen, protein PstS3, heat-shock protein Hsp70 (Mycobacterium ulcerans, Buruli ulcer); norovirus major and minor viral capsid proteins VP1 and VP2, genome polyprotein, Sapoviurus capsid protein VP1, protein Vp3, geome polyprotein (Caliciviridae family, Calicivirus infection (Norovirus and Sapovirus)); major outer membrane protein PorA, flagellin FlaA, surface antigen CjaA, fibronectin binding protein CadF, aspartate / glutamate-binding ABC transporter protein PeblA, protein FspAl, protein FspA2 (Campylobacter genus, Campylobacteriosis); glycolytic enzyme enolase, secreted aspartyl proteinases SAP1-10, glycophosphatidylinositol (GPI)-linked cell wall protein, protein Hyrl, complement receptor 3 -related protein CR3-RP, adhesin Als3p, heat shock protein 90 kDa hsp90, cell surface hydrophobicity protein CSH (usually Candida albicans and other Candida species, Candidiasis); 17-kDa antigen, protein P26, trimeric autotransporter adhesins TAAs, Bartonella adhesin A BadA, variably expressed outer-membrane proteins Vomps, protein Pap3, protein HbpA, envelope-associated protease HtrA, protein OMP89, protein GroEL, protein LalB, protein OMP43, dihydrolipoamide succinyltransferase SucB (Bartonella henselae, Cat- scratch disease); amastigote surface protein-2, amastigote-specific surface protein SSP4, cruzipain, trans-sialidase TS, trypomastigote surface glycoprotein TSA-1, complement regulatory protein CRP-10, protein G4, protein G2, paraxonemal rod protein PAR2, paraflagellar rod component Pari, mucin -Associated Surface Proteins MPSP (Trypanosoma cruzi, Chagas Disease (American trypanosomiasis)); envelope glycoproteins (gB, gC, gE, gH, gl, gK, gL), (Varicella zoster virus (VZV), Chickenpox); major outer membrane protein MOMP, probable outer membrane protein PMPC, outer membrane complex protein B OmcB, heat shock proteins Hsp60 HSP10, protein IncA, proteins from the type III secretion system, ribonucleotide reductase small chain protein NrdB, plasmid protein Pgp3, chlamydial outer protein N CopN, antigen CT521, antigen CT425, antigen CT043, antigen TC0052, antigen TC0189, antigen TC0582, antigen TC0660, antigen TC0726, antigen TC0816, antigen TC0828 (Chlamydia trachomatis, Chlamydia); low calcium response protein E LCrE, chlamydial outer protein N CopN, serine / threonine-protein kinase PknD, acyl-carrier-protein S -malonyltransferase FabD, single-stranded DNA-binding protein Ssb, major outer membrane protein MOMP, outer membrane protein 2 0mp2, polymorphic membrane protein family (Pmpl, Pmp2, Pmp3, Pmp4, Pmp5, Pmp6, Pmp7, Pmp8, Pmp9, PmplO, Pmpll, Pmpl2, Pmpl3, Pmpl4, Pmpl5, Pmpl6, Pmpl7, Pmpl8, Pmpl9, Pmp20, Pmp21), (Chlamydophila pneumoniae, Chlamydophila pneumoniae infection); cholera toxin B CTB, toxin coregulated pilin A TcpA, toxin coregulated pilin TcpF, toxin co-regulated pilus biosynthesis ptrotein F TcpF, cholera enterotoxin subunit A, cholera enterotoxin subunit B, Heat- stable enterotoxin ST, mannose-sensitive hemagglutinin MSHA, outer membrane protein U Porin ompU, Poring B protein, polymorphic membrane protein-D (Vibrio cholerae, Cholera); propionyl-CoA carboxylase PCC, 14-3-3 protein, prohibitin, cysteine proteases, glutathione transferases, gelsolin, cathepsin L proteinase CatL, Tegumental Protein 20.8 kDa TP20.8, tegumental protein 31.8 kDa TP31.8, lysophosphatidic acid phosphatase LPAP, (Clonorchis sinensis, Clonorchiasis); surface layer proteins SLPs, glutamate dehydrogenase antigen GDH, toxin A, toxin B, cysteine protease Cwp84, cysteine protease Cwpl3, cysteine protease Cwpl9, Cell Wall Protein CwpV, flagellar protein FliC, flagellar protein FliD (Clostridium difficile, Clostridium difficile infection); rhinoviruses: capsid proteins VP1, VP2, VP3, VP4; coronaviruses: sprike proteins S, envelope proteins E, membrane proteins M, nucleocapsid proteins N (usually rhinoviruses and coronaviruses, Common cold (Acute viral rhinopharyngitis; Acute coryza)); prion protein Prp (CJD prion, Creutzfeldt -Jakob disease (CJD)); envelope protein Gc, envelope protein Gn, nucleocapsid proteins (Crimean-Congo hemorrhagic fever virus, Crimean-Congo hemorrhagic fever (CCHF)); virulence-associated DEAD- box RNA helicase VAD1, galactoxylomannan-protein GalXM, glucuronoxylomannan GXM, mannoprotein MP (Cryptococcus neoformans, Cryptococcosis); acidic ribosomal protein P2 CpP2, mucin antigens Mucl, Muc2, Muc3 Muc4, Muc5, Muc6, Muc7, surface adherence protein CP20, surface adherence protein CP23, surface protein CP12, surface protein CP21, surface protein CP40, surface protein CP60, surface protein CP 15, surface- associated glycopeptides gp40, surface- associated glycopeptides gpl5, oocyst wall protein AB, profilin PRF, apyrase (Cryptosporidium genus, Cryptosporidiosis); fatty acid and retinol binding protein- 1 FAR-1, tissue inhibitor of metalloproteinase TIMP (TMP), cysteine proteinase ACEY-1, cysteine proteinase ACCP-1, surface antigen Ac- 16, secreted protein 2 ASP-2, metalloprotease 1 MTP-1, aspartyl protease inhibitor API- 1, surface-associated antigen SAA-1, adult- specific secreted factor Xa serine protease inhibitor anticoagulant AP, cathepsin D-like aspartic protease ARR-1 (usually Ancylostoma braziliense; multiple other parasites, Cutaneous larva migrans (CLM)); cathepsin L-like proteases, 53 / 25-kDa antigen, 8kDa family members, cysticercus protein with a marginal trypsin-like activity TsAg5, oncosphere protein TSOL18, oncosphere protein TSOL45- 1 A, lactate dehydrogenase A LDHA, lactate dehydrogenase B LDHB (Taenia solium, Cysticercosis); pp65 antigen, membrane protein ppl5, capsid- proximal tegument protein ppl50, protein M45, DNA polymerase UL54, helicase UL105, glycoprotein gM, glycoprotein gN, glcoprotein H, glycoprotein B gB, protein UL83, protein UL94, protein UL99 (Cytomegalovirus (CMV), Cytomegalovirus infection); capsid protein C, premembrane protein prM, membrane protein M, envelope protein E (domain I, domain II, domain II), protein NS1, protein NS2A, protein NS2B, protein NS3, protein NS4A, protein 2K, protein NS4B, protein NS5 (Dengue viruses (DEN-1, DEN-2, DEN-3 and DEN-4)-Flaviviruses, Dengue fever); 39 kDa protein (Dientamoeba fragilis, Dientamoebiasis); diphtheria toxin precursor Tox, diphteria toxin DT, pilin- specific sortase SrtA, shaft pilin protein SpaA, tip pilin protein SpaC, minor pilin protein SpaB, surface-associated protein DIP1281 (Corynebacterium diphtheriae, Diphtheria); glycoprotein GP, nucleoprotein NP, minor matrix protein VP24, major matrix protein VP40, transcription activator VP30, polymerase cofactor VP35, RNA polymerase L (Ebolavirus (EBOV), Ebola hemorrhagic fever); prion protein (vQD prion, Variant Creutzfeldt-Jakob disease (vCJD, nvCJD)); UvrABC system protein B, protein Flpl, protein Flp2, protein Flp3, protein TadA, hemoglobin receptor HgbA, outer membrane protein TdhA, protein CpsRA, regulator CpxR, protein SapA, 18 kDa antigen, outer membrane protein NcaA, protein LspA, protein LspAl, protein LspA2, protein LspB, outer membrane component DsrA, lectin DltA, lipoprotein Hip, major outer membrane protein OMP, outer membrane protein 0mpA2 (Haemophilus ducreyi, Chancroid); aspartyl protease 1 Pepl, phospholipase B PLB, alpha-mannosidase 1 AMN1, glucanosyltransferase GEL1, urease URE, peroxisomal matrix protein Pmpl, proline-rich antigen Pra, humal T-cell reative protein TcrP (Coccidioides immitis and Coccidioides posadasii, Coccidioidomycosis); allergen Tri r 2, heat shock protein 60 Hsp60, fungal actin Act, antigen Tri r2, antigen Tri r4, antigen Tri tl, protein IV, glycerol- 3-phosphate dehydrogenase Gpdl, osmosensor HwSholA, osmosensor HwSholB, histidine kinase HwHhk7B, allergen Mala s 1, allergen Mala s 11, thioredoxin Trx Mala s 13, allergen Mala f, allergen Mala s (usually Trichophyton spp, Epidermophyton spp., Malassezia spp., Hortaea werneckii, Dermatophytosis); protein EG95, protein EG10, protein EG 18, protein EgA31, protein EM 18, antigen EPCI, antigen B, antigen 5, protein P29, protein 14-3-3, 8-kDa protein, myophilin, heat shock protein 20 HSP20, glycoprotein GP-89, fatty acid binding protein FAPB (Echinococcus genus, Echinococcosis); major surface protein 2 MSP2, major surface protein 4 MSP4, MSP variant SGV1, MSP variant SGV2, outer membrane protein OMP, outer membrande protein 19 OMP-19, major antigenic protein MAPI, major antigenic protein MAPI-2, major antigenic protein MAP1B, major antigenic protein MAPI-3, Erum2510 coding protein, protein GroEL, protein GroES, 30-kDA major outer membrane proteins, GE 100-kDa protein, GE 130-kDa protein, GE 160-kDa protein (Ehrlichia genus, Ehrlichiosis); secreted antigen SagA, sagA-like proteins SalA and SalB, collagen adhesin Scm, surface proteins Fmsl (EbpA(fm), Fms5 (EbpB(fm), Fms9 (EpbC(fm) and FmslO, protein EbpC(fm), 96 kDa immunoprotective glycoprotein G1 (Enterococcus genus, Enterococcus infection); genome polyprotein, polymerase 3D, viral capsid protein VP1, viral capsid protein VP2, viral capsid protein VP3, viral capsid protein VP4, protease 2A, protease 3C (Enterovirus genus, Enterovirus infection); outer membrane proteins OM, 60 kDa outer membrane protein, cell surface antigen OmpA, cell surface antigen OmpB (sca5), 134 kDa outer membrane protein, 31 kDa outer membrane protein, 29.5 kDa outer membrane protein, cell surface protein SCA4, cell surface protein Adri (RP827), cell surface protein Adr2 (RP828), cell surface protein SCA1, Invasion protein invA, cell division protein fts, secretion proteins sec Ofamily, virulence proteins virB, tlyA, tlyC, parvulin-like protein Pip, preprotein translocase SecA, 120-kDa surface protein antigen SPA, 138 kD complex antigen, major 100-kD protein (protein I), intracytoplasmic protein D, protective surface protein antigen SPA (Rickettsia prowazekii, Epidemic typhus); Epstein-Barr nuclear antigens (EBNA-1, EBNA-2, EBNA-3A, EBNA-3B, EBNA-3C, EBNA-leader protein (EBNA-LP)), latent membrane proteins (LMP-1, LMP-2A, LMP-2B), early antigen EBV-EA, membrane antigen EBV-MA, viral capsid antigen EBV-VCA, alkaline nuclease EBV-AN, glycoprotein H, glycoprotein gp350, glycoprotein gpllO, glycoprotein gp42, glycoprotein gHgL, glycoprotein gB (Epstein- Barr Virus (EBV), Epstein-Barr Virus Infectious Mononucleosis); cpasid protein VP2, capsid protein VP1, major protein NS1 (Parvovirus B19, Erythema infectiosum (Fifth disease)); pp65 antigen, glycoprotein 105, major capsid protein, envelope glycoprotein H, protein U51 (Human herpesvirus 6 (HHV-6) and Human herpesvirus 7 (HHV-7), Exanthem subitum); thioredoxin-glutathione reductase TGR, cathepsins LI and L2, Kunitz-type protein KTM, leucine aminopeptidase LAP, cysteine proteinase Fas2, saposin-like protein-2 SAP-2, thioredoxin peroxidases TPx, Prx-1, Prx-2, cathepsin I cysteine proteinase CL3, protease cathepsin L CL1, phosphoglycerate kinase PGK, 27- kDa secretory protein, 60 kDa protein HSP35alpha, glutathione transferase GST, 28.5 kDa tegumental antigen 28.5 kDa TA, cathepsin B3 protease CatB3, Type I cystatin stefin-1, cathepsin L5, cathepsin Llg and cathepsin B, fatty acid binding protein FABP, leucine aminopeptidases LAP (Fasciola hepatica and Fasciola gigantica, Fasciolosis); prion protein (FFI prion, Fatal familial insomnia (FFI)); venom allergen homolog-like protein VAL-1, abundant larval transcript ALT-1, abundant larval transcript ALT- 2, thioredoxin peroxidase TPX, vespid allergen homologue VAH, thiordoxin peroxidase 2 TPX-2, antigenic protein SXP (peptides N, Nl, N2, and N3), activation associated protein- 1 ASP-1, Thioredoxin TRX, transglutaminase BmTGA, glutathione-S- transferases GST, myosin, vespid allergen homologue VAH, 175 kDa collagenase, glyceraldehyde- 3 -phosphate dehydrogenase GAPDH, cuticular collagen Col-4, secreted larval acidic proteins SLAPs, chitinase CHI-1, maltose binding protein MBP, glycolytic enzyme fructose-l,6-bisphosphate aldolase Fba, tropomyosin TMY-1, nematode specific gene product OvB20, onchocy statin CPL2, Cox-2 (Filarioidea superfamily, Filariasis); phospholipase C PLC, heat-labile enterotoxin B, Iota toxin component lb, protein CPE 1281 , pyruvate ferredoxin oxidoreductase, elongation factor G EF-G, perfringolysin 0 Pfo, glyceraldehyde- 3 -phosphate dehydrogenase GapC, Fructose-bisphosphate aldolase Alf2, Clostridium perfringens enterotoxin CPE, alpha toxin AT, alpha toxoid ATd, epsilon-toxoid ETd, protein HP, large cytotoxin TpeL, endo-beta-N- acetylglucosaminidase Naglu, phosphoglyceromutase Pgm (Clostridium perfringens, Food poisoning by Clostridium perfringens); leukotoxin IktA, adhesion FadA, outer membrane protein RadD, high-molecular weight arginine-binding protein (Fusobacterium genus, Fusobacterium infection); phospholipase C PLC, heat-labile enterotoxin B, Iota toxin component lb, protein CPE 1281, pyruvate ferredoxin oxidoreductase, elongation factor G EF-G, perfringolysin 0 Pfo, glyceraldehyde-3- phosphate dehydrogenase GapC, fructose-bisphosphate aldolase Alf2, Clostridium perfringens enterotoxin CPE, alpha toxin AT, alpha toxoid ATd, epsilon-toxoid ETd, protein HP, large cytotoxin TpeL, endo-beta-N-acetylglucosaminidase Naglu, phosphoglyceromutase Pgm (usually Clostridium perfringens; other Clostridium species, Gas gangrene (Clostridial myonecrosis)); lipase A, lipase B, peroxidase Decl (Geotrichum candidum, Geotrichosis); prion protein (GSS prion, Gerstmann-Straussler- Scheinker syndrome (GSS)); cyst wall proteins CWP1, CWP2, CWP3, variant surface protein VSP, VSP1, VSP2, VSP3, VSP4, VSP5, VSP6, 56 kDa antigen, pyruvate ferredoxin oxidoreductase PFOR, alcohol dehydrogenase E ADHE, alpha-giardin, alpha8 -giardin, alphal-guiardin, beta-giardin, cystein proteases, glutathione- S- transferase GST, arginine deiminase ADI, fructose-l,6-bisphosphat aldolase FBA, Giardia trophozoite antigens GTA (GTA1, GTA2), ornithine carboxyl transferase OCT, striated fiber-asseblin-like protein SALP, uridine phosphoryl-like protein UPL, alpha- tubulin, beta-tubulin (Giardia intestinalis, Giardiasis); members of the ABC transporter family (LolC, OppA, and PotF), putative lipoprotein releasing system transmembrane protein LolC / E, flagellin FliC, Burkholderia intracellular motility A BimA, bacterial Elongation factor-Tu EF-Tu, 17 kDa OmpA-like protein, boaA coding protein (Burkholderia mallei, Glanders); cyclophilin CyP, 24 kDa third-stage larvae protien GS24, excretion -secretion products ESPs (40, 80, 120 and 208 kDa) (Gnathostoma spinigerum and Gnathostoma hispidum, Gnathostomiasis); pilin proteins, minor pilin - associated subunit pilC, major pilin subunit and variants pilE, pilS, phase variation protein porA, Porin B PorB, protein TraD, Neisserial outer membrane antigen H.8, 70kDa antigen, major outer membrane protein PI, outer membrane proteins PIA and PIB, W antigen, surface protein A NspA, transferrin binding protein TbpA, transferrin binding protein TbpB , PBP2, mtrR coding protein, ponA coding protein, membrane permease FbpBC, FbpABC protein system, LbpAB proteins, outer membrane protein Opa, outer membrane transporter FetA, iron -repressed regulator MpeR (Neisseria gonorrhoeae, Gonorrhea); outer membrane protein A OmpA, outer membrane protein C OmpC, outer membrane protein K17 0mpK17 (Klebsiella granulomatis, Granuloma inguinale (Donovanosis)); fibronectin-binding protein Sfb, fibronectin / fibrinogen-binding protein FBP54, fibronectin-binding protein FbaA, M protein type 1 Emml, M protein type 6 Emm6, immunoglobulin-binding protein 35 Sib35, Surface protein R28 Spr28, superoxide dismutase SOD, C5a peptidase ScpA, antigen I / II Agl / II, adhesin AspA, G- related alpha2-macroglobulin-binding protein GRAB, surface fibrillar protein M5 (Streptococcus pyogenes, Group A streptococcal infection); C protein P antigen, arginine deiminase proteins, adhesin BibA, 105 kDA protein BPS, surface antigens c, surface antigens R, surface antigens X, trypsin-resistant protein Rl, trypsin-resistant protein R3, trypsin-resistant protein R4, surface immunogenic protein Sip, surface protein Rib, Leucine-rich repeats protein LrrG, serine-rich repeat protein Srr-2, C protein alpha- antigen Bea, Beta antigen Bag, surface antigen Epsilon, alpha-like protein ALP1, alpha- like protein ALP5 surface antigen delta, alpha-like protein ALP2, alphalike protein ALP3, alpha-like protein ALP4, Cbeta protein Bac (Streptococcus agalactiae, Group B streptococcal infection); transferrin-binding protein 2 Tbp2, phosphatase P4, outer membrane protein P6, peptidoglycan-associated lipoprotein Pal, protein D, protein E, adherence and penetration protein Hap, outer membrane protein 26 Omp26, outer membrane protein P5 (Fimbrin), outer membrane protein DI 5, outer membrane protein 0mpP2, 5'-nucleotidase NucA, outer membrane protein PI, outer membrane protein P2, outer membrane lipoprotein Pep, Lipoprotein E, outer membrane protein P4, fuculokinase FucK, [Cu,Zn]- superoxide dismutase SodC, protease HtrA, protein 0145, alpha-galactosylceramide (Haemophilus influenzae, Haemophilus influenzae infection); polymerase 3D, viral capsid protein VP1, viral capsid protein VP2, viral capsid protein VP3, viral capsid protein VP4, protease 2A, protease 3C (Enteroviruses, mainly Coxsackie A virus and Enterovirus 71 (EV71), Hand, foot and mouth disease (HFMD)); RNA polymerase L, protein L, glycoprotein Gn, glycoprotein Gc, nucleocapsid protein S, envelope glycoprotein Gl, nucleoprotein NP, protein N, polyprotein M (Sin Nombre virus, Hantavirus, Hantavirus Pulmonary Syndrome (HPS)); heat shock protein HspA, heat shock protein HspB, citrate synthase GltA, protein UreB, heat shock protein Hsp60, neutrophil-activating protein NAP, catalase KatA, vacuolating cytotoxin VacA, urease alpha UreA, urease beta Ureb, protein CpnlO, protein groES, heat shock protein HsplO, protein MopB, cytotoxicity-associated 10 kDa protein CAG, 36 kDa antigen, beta- lactamase Hep A, Beta-lactamase HcpB (Helicobacter pylori, Helicobacter pylori infection); integral membrane proteins, aggregation-prone proteins, O-antigen, toxin- antigens Stx2B, toxin-antigen StxlB, adhesion-antigen fragment Int28, protein EspA, protein EspB, Intimin, protein Tir, protein IntC300, protein Eae (Escherichia coli 0157:H7, 0111 and O104:H4, Hemolytic-uremic syndrome (HUS)); RNA polymerase L, protein L, glycoprotein Gn, glycoprotein Gc, nucleocapsid protein S, envelope glycoprotein Gl, nucleoprotein NP, protein N, polyprotein M (Bunyaviridae family, Hemorrhagic fever with renal syndrome (HFRS)); glycoprotein G, matrix protein M, nucleoprotein N, fusion protein F, polymerase L, protein W, proteinC, phosphoprotein p, non-structural protein V (Henipavirus (Hendra virus Nipah virus), Henipavirus infections); polyprotein, glycoproten Gp2, hepatitis A surface antigen HBAg, protein 2A, virus protein VP1, virus protein VP2, virus protein VP3, virus protein VP4, protein P1B, protein P2A, protein P3AB, protein P3D (Hepatitis A Virus, Hepatitis A); hepatitis B surface antigen HBsAg, Hepatitis B core antigen HbcAg, polymerase, protein Hbx, preS2 middle surface protein, surface protein L, large S protein, virus protein VP1, virus protein VP2, virus protein VP3, virus protein VP4 (Hepatitis B Virus (HBV), Hepatitis B); envelope glycoprotein El gp32 gp35 , envelope glycoprotein E2 NS1 gp68 gp70, capsid protein C , core protein Core, polyprotein, virus protein VP1, virus protein VP2, virus protein VP3, virus protein VP4, antigen G, protein NS3, protein NS5A, (Hepatitis C Virus, Hepatitis C); virus protein VP1, virus protein VP2, virus protein VP3, virus protein VP4, large hepaptitis delta antigen, small hepaptitis delta antigen (Hepatitis D Virus, Hepatitis D); virus protein VP1, virus protein VP2, virus protein VP3, virus protein VP4, capsid protein E2 (Hepatitis E Virus, Hepatitis E); glycoprotein L ULI, uracil-DNA glycosylase UL2, protein UL3, protein UL4, DNA replication protein UL5, portal protein UL6, virion maturation protein UL7, DNA helicase UL8, replication origin-binding protein UL9, glycoprotein M UL10, protein UL11, alkaline exonuclease UL12, serine- threonine protein kinase UL13, tegument protein UL14, terminase UL15, tegument protein UL16, protein UL17, capsid protein VP23 UL18, major capsid protein VP5 UL19, membrane protein UL20, tegument protein UL21, Glycoprotein H (UL22), Thymidine Kinase UL23, protein UL24, protein UL25, capsid protein P40 (UL26, VP24, VP22A), glycoprotein B (UL27), ICP18.5 protein (UL28), major DNA-binding protein ICP8 (UL29), DNA polymerase UL30, nuclear matrix protein UL31, envelope glycoprotein UL32, protein UL33, inner nuclear membrane protein UL34, capsid protein VP26 (UL35), large tegument protein UL36, capsid assembly protein UL37, VP19C protein (UL38), ribonucleotide reductase (Large subunit) UL39, ribonucleotide reductase (Small subunit) UL40, tegument protein / virion host shutoff VHS protein (UL41), DNA polymerase processivity factor UL42, membrane protein UL43, glycoprotein C (UL44), membrane protein UL45, tegument proteins VP11 / 12 (UL46), tegument protein VP13 / 14 (UL47), virion maturation protein VP16 (UL48, Alpha-TIF), envelope protein UL49, dUTP diphosphatase UL50, tegument protein UL51, DNA helicase / primase complex protein UL52, glycoprotein K (UL53), transcriptional regulation protein IE63 (ICP27, UL54), protein UL55, protein UL56, viral replication protein ICP22 (IE68, US1), protein US2, serine / threonine -protein kinase US3, glycoprotein G (US4), glycoprotein J (US5), glycoprotein D (US6), glycoprotein I (US7), glycoprotein E (US8), tegument protein US9, capsid / tegument protein US 10, Vmw21 protein (US11), ICP47 protein (IE12, US12), major transcriptional activator ICP4 (IE175, RSI), E3 ubiquitin ligase ICPO (IE110), latency-related protein 1 LRP1, latency -related protein 2 LRP2, neurovirulence factor RL1 (ICP34.5), latency-associated transcript LAT (Herpes simplex virus 1 and 2 (HSV-1 and HSV-2), Herpes simplex); heat shock protein Hsp60, cell surface protein H1C, dipeptidyl peptidase type IV DppIV, M antigen, 70 kDa protein, 17 kDa histone-like protein (Histoplasma capsulatum, Histoplasmosis); fatty acid and retinol binding protein- 1 FAR-1, tissue inhibitor of metalloproteinase TIMP (TMP), cysteine proteinase ACEY-1, cysteine proteinase ACCP-1, surface antigen Ac- 16, secreted protein 2 ASP-2, metalloprotease 1 MTP-1, aspartyl protease inhibitor API-1, surface-associated antigen SAA-1, surface-associated antigen SAA-2, adult- specific secreted factor Xa, serine protease inhibitor anticoagulant AP, cathepsin D-like aspartic protease ARR-1, glutathione S-transferase GST, aspartic protease APR-1, acetylcholinesterase AChE (Ancylostoma duodenale and Necator americanus, Hookworm infection); protein NS1, protein NP1, protein VP1, protein VP2, protein VP3 (Human bocavirus (HBoV), Human bocavirus infection); major surface protein 2 MSP2, major surface protein 4 MSP4, MSP variant SGV1, MSP variant SGV2, outer membrane protein OMP, outer membrande protein 19 OMP-19, major antigenic protein MAPI, major antigenic protein MAPI-2, major antigenic protein MAP1B, major antigenic protein MAP 1-3, Erum2510 coding protein, protein GroEL, protein GroES, 30-kDA major outer membrane proteins, GE 100-kDa protein, GE 130-kDa protein, GE 160-kDa protein (Ehrlichia ewingii, Human ewingii ehrlichiosis); major surface proteins 1-5 (MSPla, MSPlb, MSP2, MSP3, MSP4, MSP5), type IV secreotion system proteins VirB2, VirB7, VirBll, VirD4 (Anaplasma phagocytophilum, Human granulocytic anaplasmosis (HGA)); protein NS1, small hydrophobic protein NS2, SH protein, fusion protein F, glycoprotein G, matrix protein M, matrix protein M2-1, matrix protein M2-2, phosphoprotein P, nucleoprotein N, polymerase L (Human metapneumo virus (hMPV), Human metapneumo virus infection); major surface protein 2 MSP2, major surface protein 4 MSP4, MSP variant SGV1, MSP variant SGV2, outer membrane protein OMP, outer membrande protein 19 OMP- 19, major antigenic protein MAPI, major antigenic protein MAPI-2, major antigenic protein MAP1B, major antigenic protein MAPI-3, Erum2510 coding protein, protein GroEL, protein GroES, 30-kDA major outer membrane proteins, GE 100-kDa protein, GE 130-kDa protein, GE 160-kDa protein (Ehrlichia chaffeensis, Human monocytic ehrlichiosis); replication protein El, regulatory protein E2, protein E3, protein E4, protein E5, protein E6, protein E7, protein E8, major capsid protein LI, minor capsid protein L2 (Human papillomavirus (HPV), Human papillomavirus (HPV) infection); fusion protein F, hemagglutinin-neuramidase HN, glycoprotein G, matrix protein M, phosphoprotein P, nucleoprotein N, polymerase L (Human parainfluenza viruses (HPIV), Human parainfluenza virus infection); Hemagglutinin (HA), Neuraminidase (NA), Nucleoprotein (NP), Ml protein, M2 protein, NS1 protein, NS2 protein (NEP protein: nuclear export protein), PA protein, PB 1 protein (polymerase basic 1 protein), PB1-F2 protein and PB2 protein (Orthomyxoviridae family, Influenza virus (flu)); genome polyprotein, protein E, protein M, capsid protein C (Japanese encephalitis virus, Japanese encephalitis); RTX toxin, type IV pili, major pilus subunit PilA, regulatory transcription factors PilS and PilR, protein sigma54, outer membrane proteins (Kingella kingae, Kingella kingae infection); prion protein (Kuru prion, Kuru); nucleoprotein N, polymerase L, matrix protein Z, glycoprotein GP (Lassa virus, Lassa fever); peptidoglycan-associated lipoprotein PAL, 60 kDa chaperonin Cpn60 (groEL, HspB), type IV pilin PilE, outer membrane protein MIP, major outer membrane protein MompS, zinc metalloproteinase MSP (Legionella pneumophila, Legionellosis (Legionnaires' disease, Pontiac fever)); P4 nuclease, protein WD, ribonucleotide reductase M2, surface membrane glycoprotein Pg46, cysteine proteinase CP, glucose-regulated protein 78 GRP-78, stage- specific S antigen-like protein A2, ATPase Fl, beta- tubulin, heat shock protein 70 Hsp70, KMP-11, glycoprotein GP63, protein BT1, nucleoside hydrolase NH, cell surface protein Bl, ribosomal protein Pl-like protein PI, sterol 24-c-methy transferase SMT, LACK protein, histone HI, SPB 1 protein, thiol specific antioxidant TSA, protein antigen STH, signal peptidase SP, histone H2B, suface antigen PSA-2, cystein proteinase b Cpb (Leishmania genus, Leishmaniasis); major membrane protein I, serine -rich antigen- 45 kDa, 10 kDa caperonin GroES, HSP kDa antigen, amino-oxononanoate synthase AONS, protein recombinase A Rec A, AcetyL / propionyl-coenzyme A carboxylase alpha, alanine racemase, 60 kDa chaperonin 2, ESAT-6-like protein EcxB (L-ESAT-6), protein Lsr2, protein ML0276, Heparin- binding hemagglutinin HBHA, heat-shock protein 65 Hsp65, mycPl or ML0041 coding protein, htrA2 or ML0176 coding protein, htrA4 or ML2659 coding protein, gcp or ML0379 coding protein, clpC or ML0235 coding protein (Mycobacterium leprae and Mycobacterium lepromatosis, Leprosy); outer membrane protein LipL32, membrane protein LIC10258, membrane protein LP30, membrane protein LIC12238, Ompa-like protein Lsa66, surface protein LigA, surface protein LigB, major outer membrane protein OmpLl, outer membrane protein LipL41, protein LigAni, surface protein LcpA, adhesion protein LipL53, outer membrane protein UpL32, surface protein Lsa63, flagellin FlaBl, membran lipoprotein LipL21, membrane protein pL40, leptospiral surface adhesin Lsa27, outer membrane protein OmpL36, outer membrane protein OmpL37, outer membrane protein OmpL47, outer membrane protein OmpL54, acyltransferase LpxA (Leptospira genus, Leptospirosis); listeriolysin O precursor Hly (LLO), invasion- associated protein lap (P60), Listeriolysin regulatory protein PrfA, Zinc metalloproteinase Mpl, Phosphatidylinositol- specific phospholipase C PLC (PlcA, PlcB), O-acetyltransferase Oat, ABC-transporter permease Im.G_1771, adhesion protein LAP, LAP receptor Hsp60, adhesin LapB, haemolysin listeriolysin OLLO, protein ActA, Internalin A InIA, protein InIB (Listeria monocytogenes, Listeriosis); outer surface protein A OspA, outer surface protein OspB, outer surface protein OspC, decorin binding protein A DbpA, decorin binding protein B DbpB, flagellar filament 41 kDa core protein Fla, basic membrane protein A BmpA (Immunodominant antigen P39), outer surface 22 kDa lipoprotein precursor (antigen IPLA7), variable surface lipoprotein vlsE (usually Borrelia burgdorferi and other Borrelia species, Lyme disease (Lyme borreliosis)); venom allergen homolog-like protein VAL-1, abundant larval transcript ALT-1, abundant larval transcript ALT- 2, thioredoxin peroxidase TPX, vespid allergen homologue VAH, thiordoxin peroxidase 2 TPX-2, antigenic protein SXP (peptides N, Nl, N2, and N3), activation associated protein- 1 ASP-1, thioredoxin TRX, transglutaminase BmTGA, glutathione-S-transferases GST, myosin, vespid allergen homologue VAH, 175 kDa collagenase, glyceraldehyde-3-phosphate dehydrogenase GAPDH, cuticular collagen Col-4, Secreted Larval Acidic Proteins SLAPs, chitinase CHI-1, maltose binding protein MBP, glycolytic enzyme fructose-l,6-bisphosphate aldolase Fba, tropomyosin TMY-1, nematode specific gene product OvB20, onchocystatin CPL2, protein Cox-2 (Wuchereria bancrofti and Brugia malayi, Lymphatic filariasis (Elephantiasis)); glycoprotein GP, matrix protein Z, polymerase L, nucleoprotein N (Lymphocytic choriomeningitis virus (LCMV), Lymphocytic choriomeningitis); thrombospondin-related anonymous protein TRAP, SSP2 Sporozoite surface protein 2, apical membrane antigen 1 AMA1, rhoptry membrane antigen RMA1, acidic basic repeat antigen ABRA, cell-traversal protein PF, protein Pvs25, merozoite surface protein 1 MSP-1, merozoite surface protein 2 MSP-2, ring-infected erythrocyte surface antigen RESALiver stage antigen 3 LSA-3, protein Eba-175, serine repeat antigen 5 SERA-5, circumsporozoite protein CS, merozoite surface protein 3 MSP3, merozoite surface protein 8 MSP8, enolase PF10, hepatocyte erythrocyte protein 17 kDa HEP17, erythrocyte membrane protein 1 EMP1, protein Kbeta merozoite surface protein 4 / 5 MSP 4 / 5, heat shock protein Hsp90, glutamate-rich protein GLURP, merozoite surface protein 4 MSP-4, protein STARP, circumsporozoite protein-related antigen precursor CRA (Plasmodium genus, Malaria); nucleoprotein N, membrane-associated protein VP24, minor nucleoprotein VP30, polymerase cofactor VP35, polymerase L, matrix protein VP40, envelope glycoprotein GP (Marburg virus, Marburg hemorrhagic fever (MHF)); protein C, matrix protein M, phosphoprotein P, non -structural protein V, hemagglutinin glycoprotein H, polymerase L, nucleoprotein N, fusion protein F (Measles virus, Measles); members of the ABC transporter family (LolC, OppA, and PotF), putative lipoprotein releasing system transmembrane protein LolC / E, flagellin FliC, Burkholderia intracellular motility A BimA, bacterial Elongation factor-Tu EF-Tu, 17 kDa OmpA-like protein, boaA coding protein, boaB coding protein (Burkholderia pseudomallei, Melioidosis (Whitmore's disease)); pilin proteins, minor pilin-associated subunit pilC, major pilin subunit and variants pilE, pilS, phase variation protein porA, Porin B PorB, protein TraD, Neisserial outer membrane antigen H.8, 70kDa antigen, major outer membrane protein PI, outer membrane proteins PIA and PIB, W antigen, surface protein A NspA, transferrin binding protein TbpA, transferrin binding protein TbpB , PBP2, mtrR coding protein, ponA coding protein, membrane permease FbpBC, FbpABC protein system, LbpAB proteins, outer membrane protein Opa, outer membrane transporter FetA, iron -repressed regulator MpeR, factor H-binding protein fHbp, adhesin NadA, protein NhbA, repressor FarR (Neisseria meningitidis, Meningococcal disease); 66 kDa protein, 22 kDa protein (usually Metagonimus yokagawai, Metagonimiasis); polar tube proteins (34, 75, and 170 kDa in Glugea, 35, 55 and 150kDa in Encephalitozoon), kine sin-related protein, RNA polymerase II largest subunit, similar ot integral membrane protein YIPA, a nti -silencing protein 1, heat shock transcription factor HSF, protein kinase, thymidine kinase, NOP-2 like nucleolar protein (Microsporidia phylum, Microsporidiosis); CASP8 and FADD-like apoptosis regulator, Glutathione peroxidase GPX1, RNA helicase NPH-II NPH2, Poly(A) polymerase catalytic subunit PAPL, Major envelope protein P43K, early transcription factor 70 kDa subunit VETFS, early transcription factor 82 kDa subunit VETFL, metalloendopeptidase Gl-type, nucleoside triphosphatase I NPH1, replication protein A28-like MC134L, RNA polymease 7 kDa subunit RP07 (Molluscum contagiosum virus (MCV), Molluscum contagiosum (MC)); matrix protein M, phosphoprotein P / V, small hydrophobic protein SH, nucleoprotein N, protein V, fusion glycoprotein F, hemagglutinin-neuraminidase HN, RNA polymerase L (Mumps virus, Mumps); Outer membrane proteins OM, cell surface antigen OmpA, cell surface antigen OmpB (sca5), cell surface protein SCA4, cell surface protein SCA1, intracytoplasmic protein D, crystalline surface layer protein SLP, protective surface protein antigen SPA (Rickettsia typhi, Murine typhus (Endemic typhus)); adhesin PI, adhesion P30, protein pll6, protein P40, cytoskeletal protein HMW1, cytoskeletal protein HMW2, cytoskeletal protein HMW3, MPN152 coding protein, MPN426 coding protein, MPN456 coding protein, MPN-500coding protein (Mycoplasma pneumoniae, Mycoplasma pneumonia); NocA, Iron dependent regulatory protein, VapA, VapD, VapF, VapG, caseinolytic protease, filament tip-associated 43- kDa protein, protein P24, protein P61, 15-kDa protein, 56-kDa protein (usually Nocardia asteroides and other Nocardia species, Nocardiosis); venom allergen homolog-like protein VAL-1, abundant larval transcript ALT-1, abundant larval transcript ALT- 2, thioredoxin peroxidase TPX, vespid allergen homologue VAH, thiordoxin peroxidase 2 TPX-2, antigenic protein SXP (peptides N, Nl, N2, and N3), activation associated protein- 1 ASP-1, Thioredoxin TRX, transglutaminase BmTGA, glutathione-S- transferases GST, myosin, vespid allergen homologue VAH, 175 kDa collagenase, glyceraldehyde- 3 -phosphate dehydrogenase GAPDH, cuticular collagen Col-4, Secreted Larval Acidic Proteins SLAPs, chitinase CHI-1, maltose binding protein MBP, glycolytic enzyme fructose-l,6-bisphosphate aldolase Fba, tropomyosin TMY-1, nematode specific gene product OvB20, onchocystatin CPL2, Cox-2 (Onchocerca volvulus, Onchocerciasis (River blindness)); 43 kDa secreted glycoprotein, glycoprotein gpO, glycoprotein gp75, antigen Pb27, antigen Pb40, heat shock protein Hsp65, heat shock protein Hsp70, heat shock protein Hsp90, protein PIO, triosephosphate isomerase TPI, N-acetyl-glucosamine -binding lectin Paracoccin, 28 kDa protein Pb28 (Paracoccidioides brasiliensis, Paracoccidioidomycosis (South American blastomycosis)); 28-kDa cruzipain-like cystein protease Pw28CCP (usually Paragonimus westermani and other Paragonimus species, Paragonimiasis); outer membrane protein OmpH, outer membrane protein Omp28, protein PM1539, protein PM0355, protein PM 1417, repair protein MutL, protein BcbC, prtein PM0305, formate dehydrogenase-N, protein PM0698, protein PM1422, DNA gyrase, lipoprotein PlpE, adhesive protein Cp39, heme aquisition system receptor HasR, 39 kDa capsular protein, iron-regulated OMP IROMP, outer membrane protein OmpA87, fimbrial protein Ptf, fimbrial subunit protein PtfA, transferrin binding protein Tbpl, esterase enzyme MesA, Pasteurella multocida toxin PMT, adhesive protein Cp39 (Pasteurella genus, Pasteurellosis); "filamentous hemagglutinin FhaB, adenylate cyclase CyaA, pertussis toxin subunit 4 precursor PtxD, pertactin precursor Pm, toxin subunit 1 PtxA, protein Cpn60, protein brkA, pertussis toxin subunit 2 precursor PtxB, pertussis toxin subunit 3 precursor PtxC, pertussis toxin subunit 5 precursor PtxE, pertactin Pm, protein Fim2, protein Fim3; " (Bordetella pertussis, Pertussis (Whooping cough)); "Fl capsule antigen, virulence-associated V antigen, secreted effector protein LcrV, V antigen, outer membrane protease Pla, secreted effector protein YopD, putative secreted protein- tyrosine phosphatase YopH, needle complex major subunit YscF, protein kinase YopO, putative autotransporter protein YapF, inner membrane ABC-transporter YbtQ (Irp7), putative sugar binding protein YPO0612, heat shock protein 90 HtpG, putative sulfatase protein YdeN, outer- membrane lipoprotein carrier protein LolA, secretion chaperone YerA, putative lipoprotein YP00420, hemolysin activator protein HpmB, pesticin / yersiniabactin outer membrane receptor Psn, secreted effector protein YopE, secreted effector protein YopF, secreted effector protein YopK, outer membrane protein YopN , outer membrane protein YopM, Coagulase / fibrinolysin precursor Pla ; " (Yersinia pestis, Plague); protein PhpA, surface adhesin PsaA, pneumolysin Ply, ATP- dependent protease CIp, lipoate -protein ligase LplA, cell wall surface anchored protein psrP, sortase SrtA, glutamyl-tRNA synthetase GltX, choline binding protein A CbpA, pneumococcal surface protein A PspA, pneumococcal surface protein C PspC, 6- phosphogluconate dehydrogenase Gnd, iron-binding protein PiaA, Murein hydrolase LytB, proteon LytC, protease Al (Streptococcus pneumoniae, Pneumococcal infection); major surface protein B, kexin-like protease KEX1, protein A12, 55 kDa antigen P55, major surface glycoprotein Msg (Pneumocystis jirovecii, Pneumocystis pneumonia (PCP)); genome polyprotein, polymerase 3D, viral capsid protein VP1, viral capsid protein VP2, viral capsid protein VP3, viral capsid protein VP4, protease 2A, protease 3C (Poliovirus, Poliomyelitis); protein Nfal, exendin-3, secretory lipase, cathepsin B-like protease, cysteine protease, cathepsin, peroxiredoxin, protein CrylAc (usually Naegleria fowleri, Primary amoebic meningoencephalitis (PAM)); agnoprotein, large T antigen, small T antigen, major capsid protein VP1, minor capsid protein Vp2 (JC virus, Progressive multifocal leukoencephalopathy); low calcium response protein E LCrE, chlamydial outer protein N CopN, serine / threonine-protein kinase PknD, acyl-carrier- protein S -malonyltransferase FabD, single-stranded DNA-binding protein Ssb, major outer membrane protein MOMP, outer membrane protein 2 0mp2, polymorphic membrane protein family (Pmpl, Pmp2, Pmp3, Pmp4, Pmp5, Pmp6, Pmp7, Pmp8, Pmp9, PmplO, Pmpll, Pmpl2, Pmpl3, Pmpl4, Pmpl5, Pmpl6, Pmpl7, Pmpl8, Pmpl9, Pmp20, Pmp21) (Chlamydophila psittaci, Psittacosis); outer membrane protein PI, heat shock protein B HspB, peptide ABC transporter, GTP -binding protein, protein IcmB, ribonuclease R, phosphatas SixA, protein DsbD, outer membrane protein TolC, DNA- binding protein PhoB, ATPase DotB, heat shock protein B HspB, membrane protein Coml, 28 kDa protein, DNA-3-methyladenine glycosidase I, pouter membrane protein OmpH, outer membrane protein AdaA, glycine cleavage system T-protein (Coxiella burnetii, Q fever); nucleoprotein N, large structural protein L, phophoprotein P, matrix protein M, glycoprotein G (Rabies virus, Rabies); fusionprotein F, nucleoprotein N, matrix protein M, matrix protein M2-1, matrix protein M2-2, phophoprotein P, small hydrophobic protein SH, major surface glycoprotein G, polymerase L, non- structural protein 1 NS1, non- structural protein 2 NS2 (Respiratory syncytial virus (RSV), Respiratory syncytial virus infection); genome polyprotein, polymerase 3D, viral capsid protein VP1, viral capsid protein VP2, viral capsid protein VP3, viral capsid protein VP4, protease 2A, protease 3C (Rhinovirus, Rhinovirus infection); outer membrane proteins OM, cell surface antigen OmpA, cell surface antigen OmpB (sca5), cell surface protein SCA4, cell surface protein SCA1, protein PS 120, intracytoplasmic protein D, protective surface protein antigen SPA (Rickettsia genus, Rickettsial infection); outer membrane proteins OM, cell surface antigen OmpA, cell surface antigen OmpB (sca5), cell surface protein SCA4, cell surface protein SCA1, intracytoplasmic protein D (Rickettsia akari, Rickettsialpox); envelope glycoprotein GP, polymerase L, nucleoprotein N, non- structural protein NSS (Rift Valley fever virus, Rift Valley fever (RVF)); outer membrane proteins OM, cell surface antigen OmpA, cell surface antigen OmpB (sca5), cell surface protein SCA4, cell surface protein SCA1, intracytoplasmic protein D (Rickettsia rickettsii, Rocky mountain spotted fever (RMSF)); non -structural protein 6 NS6, non -structural protein 2 NS2, intermediate capsid protein VP6, inner capsid protein VP2, non-structural protein 3 NS3, RNA-directed RNA polymerase L, protein VP3, non- structural protein 1 NS1, non -structural protein 5 NS5, outer capsid glycoprotein VP7, nonstructural glycoprotein 4 NS4, outer capsid protein VP4; (Rotavirus, Rotavirus infection); polyprotein P200, glycoprotein El, glycoprotein E2, protein NS2, capsid protein C (Rubella virus, Rubella); chaperonin GroEL (Mop A), inositol phosphate phosphatase SopB, heat shock protein HsIU, chaperone protein DnaJ, protein TviB, protein IroN, flagellin FliC, invasion protein SipC, glycoprotein gp43, outer membrane protein LamB, outer membrane protein PagC, outer membrane protein TolC, outer membrane protein NmpC, outer membrane protein FadL, transport protein SadA, transferase WgaP, effector proteins SifA, SteC, SseL, SseJ and SseF (Salmonella genus, Salmonellosis); "protein 14, non -structural protein NS7b, non -structural protein NS8a, protein 9b, protein 3a, nucleoprotein N, non-structural protein NS3b, non -structural protein NS6, protein 7a, non- structural protein NS8b, membrane protein M, envelope small membrane protein EsM, replicase polyprotein la, spike glycoprotein S, replicase polyprotein lab; SARS coronavirus, SARS (Severe Acute Respiratory Syndrome)); serin protease, Atypical Sarcoptes Antigen 1 ASA1, glutathione S -transferases GST, cystein protease, serine protease, apolipoprotein (Sarcoptes scabiei, Scabies); glutathione S- transferases GST, paramyosin, hemoglbinase SM32, major egg antigen, 14 kDa fatty acid-binding protein Sml4, major larval surface antigen P37, 22,6 kDa tegumental antigen, calpain CANP, triphospate isomerase Tim, surface protein 9B, outer capsid protein VP2, 23 kDa integral membrane protein Sm23, Cu / Zn -superoxide dismutase, glycoprotein Gp, myosin (Schistosoma genus, Schistosomiasis (Bilharziosis)); 60 kDa chaperonin, 56 kDa type-specific antigen, pyruvate phosphate dikinase, 4- hydroxybenzoate octaprenyltransferase (Orientia tsutsugamushi, Scrub typhus); dehydrogenase GuaB, invasion protein Spa32, invasin IpaA, invasin IpaB, invasin IpaC, invasin IpaD, invasin IpaH, invasin IpaJ (Shigella genus, Shigellosis (Bacillary dysentery)); protein P53, virion protein US 10 homolog, transcriptional regulator IE63, transcriptional transactivator IE62, protease P33, alpha trans-inducing factor 74 kDa protein, deoxyuridine 5'-triphosphate nucleotidohydrolase, transcriptional transactivator IE4, membrane protein UL43 homolog, nuclear phosphoprotein UL3 homolog, nuclear protein UL4 homolog, replication origin-binding protein, membrane protein 2, phosphoprotein 32, protein 57,DNA polymerase processivity factor, portal protein 54, DNA primase, tegument protein UL14 homolog, tegument protein UL21 homolog, tegument protein UL55 homolog, tripartite terminase subunit UL33 homolog, tri partite terminase subunit ULI 5 homolog, capsid -binding protein 44, virion-packaging protein 43 (Varicella zoster virus (VZV), Shingles (Herpes zoster)); truncated 3-beta hydroxy- 5-ene steroid dehydrogenase homolog, virion membrane protein A13, protein A19, protein A31, truncated protein A35 homolog, protein A37.5 homolog, protein A47, protein A49, protein A51, semaphorin-like protein A43, serine proteinase inhibitor 1, serine proteinase inhibitor 2, serine proteinase inhibitor 3, protein A6, protein B15, protein CI, protein C5, protein C6, protein F7, protein F8, protein F9, protein Fll, protein Fl 4, protein Fl 5, protein F16 (Variola major or Variola minor, Smallpox (Variola)); adhesin / glycoprotein gp70, proteases (Sporothrix schenckii, Sporotrichosis); heme-iron binding protein IsdB, collagen adhesin Cna, clumping factor A ClfA, protein MecA, fibronectin-binding protein A FnbA, enterotoxin type A EntA, enterotoxin type B EntB, enterotoxin type C EntCl, enterotoxin type C EntC2, enterotoxin type D EntD, enterotoxin type E EntE, Toxic shock syndrome toxin- 1 TSST-1, Staphylokinase, Penicillin binding protein 2a PBP2a (MecA), secretory antigen SssA (Staphylococcus genus, Staphylococcal food poisoning); heme-iron binding protein IsdB, collagen adhesin Cna, clumping factor A ClfA, protein MecA, fibronectin-binding protein A FnbA, enterotoxin type A EntA, enterotoxin type B EntB, enterotoxin type C EntCl, enterotoxin type C EntC2, enterotoxin type D EntD, enterotoxin type E EntE, Toxic shock syndrome toxin-1 TSST-1, Staphylokinase, Penicillin binding protein 2a PBP2a (MecA), secretory antigen SssA (Staphylococcus genus e.g. aureus, Staphylococcal infection); antigen Ss-IR, antigen NIE, strongylastacin, Na+-K+ ATPase Sseat-6, tropomysin SsTmy-1, protein LEC-5, 41 kDa antigen P5, 41-kDa larval protein, 31-kDa larval protein, 28-kDa larval protein (Strongyloides stercoralis, Strongyloidiasis); glycerophosphodiester phosphodiesterase GlpQ (Gpd), outer membrane protein TmpB, protein Tp92, antigen TpFl, repeat protein Tpr, repeat protein F TprF, repeat protein G TprG, repeat protein I Tprl, repeat protein J TprJ, repeat protein K TprK, treponemal membrane protein A TmpA, lipoprotein, 15 kDa Tppl5, 47 kDa membrane antigen, miniferritin TpFl, adhesin Tp0751, lipoprotein TP0136, protein TpN17, protein TpN47, outer membrane protein TP0136, outer membrane protein TP0155, outer membrane protein TP0326, outer membrane protein TP0483, outer membrane protein TP0956 (Treponema pallidum, Syphilis); Cathepsin L-like proteases, 53 / 25-kDa antigen, 8kDa family members, cysticercus protein with a marginal trypsin-like activity TsAg5, oncosphere protein TSOL18, oncosphere protein TSOL45-1A, lactate dehydrogenase A LDHA, lactate dehydrogenase B LDHB (Taenia genus, Taeniasis); tetanus toxin TetX, tetanus toxin C TTC, 140 kDa S layer protein, flavoprotein beta-subunit CT3, phospholipase (lecithinase), phosphocarrier protein HPr (Clostridium tetani, Tetanus (Lockjaw)); genome polyprotein, protein E, protein M, capsid protein C (Tick-borne encephalitis virus (TBEV), Tick-borne encephalitis); 58-kDa antigen, 68-kDa antigens, Toxocara larvae excretory- secretory antigen TES, 32-kDa glycoprotein, glycoprotein TES-70, glycoprotein GP31, excretory -secretory antigen TcES-57, perienteric fluid antigen Pe, soluble extract antigens Ex, excretory / secretory larval antigens ES, antigen TES-120, polyprotein allergen TBA-1, cathepsin L-like cysteine protease c-cpl-1, 26- kDa protein (Toxocara canis or Toxocara cati, Toxocariasis (Ocular Larva Migrans (OLM) and Visceral Larva Migrans (VLM))); microneme proteins (MIC1, MIC2, MIC3, MIC4, MIC5, MIC6, MIC7, MIC8), rhoptry protein Rop2, rhoptry proteins (Ropl, Rop2, Rop3, Rop4, Rop5, Rop6, Rop7, Ropl6, Rjopl7), protein SRI, surface antigen P22, major antigen p24, major surface antigen p30, dense granule proteins (GRA1, GRA2, GRA3, GRA4, GRA5, GRA6, GRA7, GRA8, GRA9, GRA10), 28 kDa antigen, surface antigen SAG1, SAG2 related antigen, nucleoside-triphosphatase 1, nucleoside-triphosphatase 2, protein Stt3, HesB-like domain-containing protein, rhomboid-like protease 5, toxomepsin 1 (Toxoplasma gondii, Toxoplasmosis); 43 kDa secreted glycoprotein, 53 kDa secreted glycoprotein, paramyosin, antigen Ts21, antigen Ts87, antigen p46000, TSL-1 antigens, caveolin-1 CAV-1, 49 kDa newborn larva antigen, prosaposin homologue, serine protease, serine proteinase inhibitor, 45 -kDa glycoprotein Gp45 (Trichinella spiralis, Trichinellosis); Myb-like transcriptional factors (Mybl, Myb2, Myb3), adhesion protein AP23, adhesion protein AP33, adhesin protein AP33-3, adhesins AP51, adhesin AP65, adhesion protein AP65-1, alpha-actinin, kinesin- associated protein, teneurin, 62 kDa proteinase, subtilisin-like serine protease SUB1, cysteine proteinase gene 3 CP3, alpha-enolase Enol, cysteine proteinase CP30, heat shock proteins (Hsp70, Hsp60) , immunogenic protein P270, (Trichomonas vaginalis, Trichomoniasis); beta-tubulin, 47-kDa protein, secretory leucocyte-like proteinase- 1 SLP-1, 50-kDa protein TT50, 17 kDa antigen, 43 / 47 kDa protein (Trichuris trichiura, Trichuriasis (Whipworm infection)); protein ESAT-6 (EsxA), 10 kDa filtrate antigen EsxB, secreted antigen 85-B FBPB, fibronectin-binding protein A FbpA (Ag85A), serine protease PepA, PPE family protein PPE18, fibronectin-binding protein D FbpD, immunogenic protein MPT64, secreted protein MPT51, catalase-peroxidase- peroxynitritase T KATG, periplasmic phosphate-binding lipoprotein PSTS3 (PBP-3, Phos-1), iron-regulated heparin binding hemagglutinin Hbha, PPE family protein PPE14, PPE family protein PPE68, protein Mtb72F, protein Apa, immunogenic protein MPT63, periplasmic phosphate-binding lipoprotein PSTS1 (PBP-1), molecular chaperone DnaK, cell surface lipoprotein Mpt83, lipoprotein P23, phosphate transport system permease protein pstA, 14 kDa antigen, fibronectin-binding protein C FbpCl, Alanine dehydrogenase TB43, Glutamine synthetase 1, ESX-1 protein, protein CFP10, TB10.4 protein, protein MPT83, protein MTB12, protein MTB8, Rpf-like proteins, protein MTB32, protein MTB39, crystallin, heat -shock protein HSP65, protein PST-S (usually Mycobacterium tuberculosis, Tuberculosis); outer membrane protein FobA, outer membrane protein FobB, intracellular growth locus IglCl, intracellular growth locus IglC2, aminotransferase Wbtl, chaperonin GroEL, 17 kDa major membrane protein TUL4, lipoprotein LpnA, chitinase family 18 protein, isocitrate dehydrogenase, Nif3 family protein, type IV pili glycosylation protein, outer membrane protein tolC, FAD binding family protein, type IV pilin multimeric outer membrane protein, two component sensor protein KdpD, chaperone protein DnaK, protein TolQ (Francisella tularensis, Tularemia); "MB antigen, urease, protein GyrA, protein GyrB, protein ParC, protein ParE, lipid associated membrane proteins LAMP, thymidine kinase TK, phospholipase PL-A1, phospholipase PL-A2, phospholipase PL-C, surface-expressed 96-kDa antigen; (Ureaplasma urealyticum, Ureaplasma urealyticum infection); non- structural polyprotein, structural polyprotein, capsid protein CP, protein El, protein E2, protein E3, protease PI, protease P2, protease P3 (Venezuelan equine encephalitis virus, Venezuelan equine encephalitis); glycoprotein GP, matrix protein Z, polymerase L, nucleoprotein N (Guanarito virus, Venezuelan hemorrhagic fever); polyprotein, protein E, protein M, capsid protein C, protease NS3, protein NS1, protein NS2A, protein AS2B, brotein NS4A, protein NS4B, protein NS5 (West Nile virus, West Nile Fever); cpasid protein CP, protein El, protein E2, protein E3, protease P2 (Western equine encephalitis virus, Western equine encephalitis); genome polyprotein, protein E, protein M, capsid protein C, protease NS3, protein NS1, protein NS2A, protein AS2B, protein NS4A, protein NS4B, protein NS5 (Yellow fever virus, Yellow fever); putative Yop targeting protein YobB, effector protein YopD, effector protein YopE, protein YopH, effector protein YopJ, protein translocation protein YopK, effector protein YopT, protein YpkA, flagellar biosyntheses protein FlhA, peptidase M48, potassium efflux system KefA, transcriptional regulatoer RovA, adhesin Ifp, translocator portein LcrV, protein PcrV, invasin Inv, outer membrane protein OmpF-like porin, adhesin YadA, protein kinase C, phospholipase CI, protein PsaA, mannosyltransferase-like protein WbyK, protein YscU, antigen YPMa (Yersinia pseudotuberculosis, Yersinia pseudotuberculosis infection); effector protein YopB, 60 kDa chaperonin, protein WbcP, tyrosin- protein phosphatase YopH, protein YopQ, enterotoxin, Galactoside permease, reductaase NrdE, protein YasN, Invasin Inv, adhesin YadA, outer membrane porin F OmpF, protein UspAl, protein EibA, protein Hia, cell surface protein Ail, chaperone SycD, protein LcrD, protein LcrG, protein LcrV, protein SycE, protein YopE, regulator protein TyeA, protein YopM, protein YopN, protein YopO, protein YopT, protein YopD, protease ClpP, protein MyfA, protein FilA, and protein PsaA (Yersinia enterocolitica, Yersiniosis).

[0355]

[0213] In embodiments wherein the infectious disease is influenza, the mRNA molecule may have a coding region encoding at least one antigenic peptide or protein derived from hemagglutinin (HA), neuraminidase (NA), nucleoprotein (NP), matrix protein 1 (Ml), matrix protein 2 (M2), non- structural protein 1 (NS1), non-structural protein 2 (NS2), nuclear export protein (NEP), polymerase acidic protein (PA), polymerase basic protein PB1, PB1-F2, or polymerase basic protein 2 (PB2) of an influenza virus or a fragment or variant thereof.

[0356]

[0214] In certain embodiments, the coding region encodes at least one antigenic peptide or protein derived from hemagglutinin (HA) and / or neuraminidase (NA) of an influenza virus or a fragment or variant thereof. The HA and / or NA may, independently, be derived from an influenza A virus or an influenza B virus or a fragment of either.

[0357]

[0215] In embodiments wherein the infectious disease is influenza, the mRNA molecule may have a coding region encoding at least one antigenic peptide or protein derived from Spike (S) protein.

[0358] EXAMPLES

[0359] Example 1: General Synthetic Approach to Compounds

[0360]

[0216] An exemplary synthesis is shown below as one approach by which a compound of the present disclosure may be made. The synthetic approach would be known to a person of skill in the art and so the below scheme is exemplary only. Simple modifications of conditions or the nature of any particular substrate may be changed to achieve any compound within the scope of Formula I. 1 2

[0361] To a solution of compound 1 (5.00 g, 14.6 mmol, 1.00 eq) and compound la (6.32 g, 43.8 mmol, 3.00 eq) in tetrahydrofuran (100 mL) was added EDCI (8.40 g, 43.8 mmol, 3.00 eq) and DMAP (3.57 g, 29.2 mmol, 2.00 eq). The solution was stirred at 25 °C for 12 hrs. LCMS showed desired mass (Rt = 0.882 min, m / z = 617.5 (M+23)) was detected. The reaction mixture was added aq.NaHCOs (100 mL) and extracted with ethyl acetate (100 mL x 2). The combined organic was dried over MgSCL. filtered and concentrated under reduced pressure to give a crude product. The residue was purified by flash silica gel chromatography (ISCO®; 330 g SepaFlash ® Silica Flash Column, Eluent of 0 ~ 2% ethyl acetate / petroleum ether gradient @ lOOmL / min, petroleum ether / ethyl acetate = 8 / 1, P: Rf = 0.69). Compound 2 (5.20 g, 8.74 mmol, 59.9% yield) was obtained as colorless oil.

[0362] General procedure for preparation of Compound SL112

[0363] SL112

[0364] 250 mg, 97%

[0365]

[0217] A mixture of compound 2 (2.00 g, 3.36 mmol, 1.00 eq), compound ] (307 mg, 3.70 mmol, 387 pL, 1.10 eq) and compound k (485 mg, 3.70 mmol, 1.10 eq) was stirred at 80 °C for 12 hrs. LCMS: (EW51618-3-P1A) showed desired mass (Rt = 0.650 min, m / z = 809.7 (M+l)) was detected. The reaction mixture was diluted with dichloromethane (2.00 mL). The reaction mixture was purified by flash silica gel chromatography (ISCO®; 40 g SepaFlash® Silica Flash Column, Eluent of 0 ~ 20% tetrahydrofuran / petroleum ether gradient @ 35 mL / min, dichloromethane / methanol = 10 / 1, P: Rf = 0.34) to give a residue. The residue was further purified by flash silica gel chromatography (ISCO®; 20 g SepaFlash® Silica Flash Column, Eluent of 0 ~ 2% methanol / dichloromethane gradient @ 35 mL / min, TLC (dichloromethane / methanol = 10 / 1, P: Rf = 0.34)). Compound SL112 (320 mg, 395 pmol, 11.8% yield, 100% purity) was obtained as yellow oil. LCMS: EW51618-3-P1A, Rt = 2.208 min, m / z = 809.0 (M+l). 'H NMR: (400 MHz, CDCh) 56.52 (t, J= 5.8 Hz, 1H), 4.76 - 4.83 (m, 2H), 3.21

[0366] - 3.32 (m, 2H), 2.37 (t, J= 7.4 Hz, 2H), 2.29 (t, J= 7.0 Hz, 2H), 2.21 - 2.34 (m, 12H), 1.82 - 1.93 (m, 2H), 1.73 - 1.76 (m, 2H), 1.51 - 1.63 (m, 4H), 1.42 - 1.54 (m, 10H), 1.12

[0367] - 1.34 (m, 34H), 1.03 (s, 4H), 0.81 - 0.93 (m, 15H).

[0368] General procedure for preparation of Compound SL113

[0369]

[0218] To a solution of compound SL113-la (45.0 g, 169 mmol, 1.00 eq) in dimethylformamide (500 mL) was added PPhs (49.2 g, 187 mmol, 1.11 eq). The solution was cooled to 0 °C and NBS (32.5 g, 182 mmol, 1.08 eq) was added in portions, then the mixture was stirred for 1 hr at 20 °C. TLC (petroleum ether / ethyl acetate = 12 / 1, Pl : Rf = 0.94) showed compound SL113-la (Rf = 0.46) consumed. The reaction was quenched with methanol (11.0 mL). The solution was diluted with ethyl acetate (1.00 L), washed with water (500 mL), aq.NaHCCh (500 mL) and brine (500 mL x 3), dried by Na2SOr, fdtered and concentrated to dryness. The residue was purified by flash silica gel chromatography (ISCO®; 330 g SepaFlash® Silica Flash Column, Eluent of 0 ~ 5% ethyl acetate / petroleum ether gradient @ 100 mL / min, TLC (petroleum ether / ethyl acetate = 12 / 1, Pl : Rf = 0.94)). Compound SL113-1 (50.0 g, 152 mmol, 89.9% yield) was obtained as a colorless oil. 'H NMR: (400 MHz, CDCh) 5 5.35 - 5.39 (m, 4H), 3.42 (t, J = 6.4 Hz, 2H), 2.78 (t, J = 7.2 Hz, 2H), 2.04 - 2.07 (m, 4H), 1.84 - 1.88 (m, 2H), 1.29 - 1.44 (m, 16H), 0.90 (t, J = 7.2 Hz, 3H). General procedure for preparation of Compound SL113-2

[0370]

[0219] To the suspension of Mg (2.77 g, 114 mmol, 1.50 eq) in tetrahydrofuran (45.0 mL) was added compound SL113-1 (25.0 g, 75.9 mmol, 1.00 eq) in tetrahydrofuran (25.0 mL) dropwise. The reaction was heated at 45 °C for 3 hrs. After cooling to 0 °C, a solution of ethyl formate (5.79 g, 78.2 mmol, 6.29 mL, 1.03 eq) in tetrahydrofuran (40.0 mL) was added dropwise over 40 min and the reaction stirred at 20 °C for 16 hrs. TLC (petroleum ether / ethyl acetate = 12 / 1, PL Rf = 0.46) showed compound SL113-1 (Rf = 0.95) remained. The reaction was cooled to -15 °C and slowly added HC1 (5M, 185 mL). The mixture was added H2O (200 mL) and hexane (300 mL) and separated. The aqueous phase was removed. The organic was washed with H2O (200 mL) and then concentrated to give a yellow oil. The yellow oil was stirred with a mixture of ethanol (37.0 mL), H2O (5.50 mL) and KOH (2.82 g) for 1.5 hrs at 20 °C. The ethanol was evaporated and the residue treated with hexane (200 mL). The mixture was slowly added HC1 (5M, 70.0 mL). The organic was washed with H2O (2 x 100 mL), evaporated, dried by Na2SO4 and concentrated. The residue was purified by flash silica gel chromatography (ISCO®; 220 g SepaFlash® Silica Flash Column, Eluent of 0 ~ 10% ethyl acetate / petroleum ether gradient @ 100 mL / min, TLC (petroleum ether / ethyl acetate = 12 / 1, PL Rf = 0.46)). Compound SL113-2 (13.0 g, 24.6 mmol, 32.4% yield) was obtained as a colorless oil. 'H NMR: (400 MHz, CDCh) 5 5.33 - 5.40 (m, 8H), 3.57 - 3.60 (m, 1H), 2.78 (t, J = 6.4 Hz, 4H), 2.03 - 2.07 (m, 8H), 1.27 - 1.44 (m, 44H), 0.90 (t, J = 6.8 Hz, 6H).

[0371] General procedure for preparation of Compound SL113-3

[0372]

[0220] To a solution of compound SL113-2 (12.0 g, 22.7 mmol, 1.00 eq) in di chloromethane (480 mL) was added Na2CCh (1.20 g, 11.3 mmol, 0.50 eq) in portions and then PCC (12.2 g, 56.7 mmol, 2.50 eq) was added over a period of 15 min. The black mixture was stirred at 20 °C for 1.50 hrs. TLC (petroleum ether / ethyl acetate = 12 / 1, Pl : Rf = 0.70) showed compound SL113-2 (Rf = 0.45) was consumed. The mixture was added silica gel (12.0 g) and purified by silicone pad (200 g), the pad was washed with dichloromethane (400 mL x 3). The filtrate was concentrated under reduce pressure to give a residue. The residue was combined with EW51657-12-P1 and purified by flash silica gel chromatography (ISCO®; 120 g SepaFlash® Silica Flash Column, Eluent of 0 ~ 3% ethyl acetate / petroleum ether gradient @ 80 mL / min, TLC (petroleum ether / ethyl acetate = 12 / 1, Pl : Rf = 0.70)). Compound SL113-3 (12.0 g, crude) was obtained as a colorless oil. 'H NMR: (400 MHz, CDCh) 5 5.32 - 5.40 (m, 8H), 2.78 (t, J = 6.4 Hz, 4H), 2.39 (t, J = 7.2 Hz, 4H), 2.03 - 2.07 (m, 8H), 1.52 - 1.56 (m, 3H), 1.30 - 1.40 (m, 32H), 0.90 (t, J = 6.8 Hz, 6H).

[0373] General procedure for preparation of Compound SL113

[0374]

[0221] To a mixture of compound SL113-3 (2.00 g, 3.80 mmol, 1.00 eq) and compound k (996 mg, 7.59 mmol, 2.00 eq) was added compound j (631 mg, 7.59 mmol, 794 pL, 2.00 eq) in 1,2-di chloroethane (1.00 mL). The mixture was stirred at 80 °C for 13 hrs. TLC (petroleum ether / ethyl acetate = 10 / 1, Pl : Rf = 0.15) showed compound SL113-3 (Rf = 0.66) was remained. The mixture was extracted by di chloromethane (15.0 mL), washed with brine (15.0 mL), dried by Na2SO4, filtered and concentrated in vacuum. The residue was purified by flash silica gel chromatography (ISCO®; 40 g SepaFlash ® Silica Flash Column, Eluent of 0 ~ 3% methanol / di chloromethane gradient @ 40 mL / min, dichloromethane / methanol = 10 / 1, P: Rf = 0.39). Compound SL113 (450 mg, 605 pmol, 99.6% purity) was obtained as a yellow oil. LCMS: Rt = 2.359 min, m / z = 741.8 (M+l). 'H NMR: (400 MHz, CDCh) 5 6.52 (t, J = 6.0 Hz, 1H), 3.19 - 3.24 (m, 2H), 2.70 (t, J = 6.4 Hz, 4H), 2.36 (t, J = 7.2 Hz, 2H), 2.34 (t, J = 6.8 Hz, 2H), 2.18 (s, 6H), 1.95 - 1.99 (m, 10H), 1.73 - 1.75 (m, 2H), 1.41 - 1.45 (m, 2H), 1.21 - 1.27 (m, 34H), 1.16 (s, 4H), 0.66 - 0.87 (m, 9H).

[0375] Preparation of Compound 1-2

[0376]

[0222] A 250 mLflask was charged with Mg (2.44 g, 100 mmol, 2.36 eq), THF

[0377] (15.0 mL) and stir-bar and flushed with nitrogen. Compound 1-1 (28.0 g, 85.0 mmol, 2.00 eq) in THF (80.0 mL) was prepared, and 2.00 mL of this solution added to the magnesium suspension. When most of the heat had dissipated, the remainder of the bromide was added over a period of 40 min. Temperature was then maintained at 45 °C for 3 hrs. The reaction was then cooled (0 °C.), a solution of ethyl formate (6.93 g, 93.5 mmol, 7.52 mL, 2.20 eq) in THF (80.0 mL) was added by syringe over a 30 min period. The reaction was stirred at 20 °C for 16 hrs. TLC (Petroleum ether: Ethyl acetate=10: l) showed a little of reactant (Rf = 0.93) remained and a new main spot (Pl: Rf = 0.42) was formed. The reaction was cooled to -15°C. 4N HC1 (13.2 mL) was added slowly. The mixture was transferred to a separating funnel separated. Water (100 mL) and hexane (100 mL) were added, the mixture was washed again, and the aqueous layer removed. The organic extract was washed a final time with water (15.0 mL) and then concentrated to a yellow oil. The yellow oil was stirred with a mixture of EtOH (45.0 mL), water (9.00 mL) and KOH (3.00 g) for 1.5 hrs at 20 °C, then the solvent EtOH was evaporated and the residue treated with hexane (5.00 mL), and 5N HC1 (14.2 mL) was added via dropping funnel. The organic was washed with water (2x50.0 mL) evaporated, dried by NaiSO4, concentrated in vacuum. The residue was purified by flash silica gel chromatography (ISCO®; 40 g SepaFlash® Silica Flash Column, Eluent of 0~3%Ethyl acetate / Petroleum ether gradient@30 mL / min). Compound 1-2 (16.4 g, 31.0 mmol, 72.9% yield) was obtained as a brown oil. 'H NMR: (400 MHz, CDCh) 5 5.22 - 5.50 (m, 8H), 3.59 (br dd, J = 4.2, 6.8 Hz, 1H), 2.78 (t, J = 6.4 Hz, 4H), 2.06 (q, J = 6.8 Hz, 8H), 1.25 - 1.49 (m, 43H), 0.88 - 0.92 (m, 6H). Preparation of Compound 1-3

[0378] 1-2 1-3

[0379]

[0223] To a solution of compound 1-2 (15.4 g, 29.1 mmol, 1.00 eq) in DCM (100 mL) and DMSO (100 mL) was added IBX (20.3 g, 72.7 mmol, 2.50 eq) in one portion. The black mixture was stirred at 20 °C for 1.5 hrs. TLC (Petroleum ether: Ethyl acetate = 10: 1, Pl: Rf = 0.69) showed reactant (Rf = 0.39) consumed. The mixture was poured into NaHCOs solution (50.0 mL), extracted by EtOAc (100 mL*2), washed with brines (100.0 mL*3), dried by NaiSCk, concentrated to dryness. The residue was purified by flash silica gel chromatography (ISCO®; 120 g SepaFlash® Silica Flash Column, Eluent of 0~10%Ethyl acetate / Petroleum ether gradient @ 80 mL / min). Compound 1-3 (15.0 g, 28.4 mmol, 97.7% yield) was obtained as a colorless oil. 'H NMR: (400 MHz, CDCh) 5 5.32 - 5.45 (m, 4H), 4.23 (t, J = 6.6 Hz, 4H), 3.01 (s, 6H), 2.78 (t, J = 6.6 Hz, 4H), 2.06 (q, J = 6.8 Hz, 4H), 1.67 - 1.84 (m, 2H), 1.23 - 1.48 (m, 17H), 0.84 - 0.95 (m, 3H).

[0380] Preparation of Compound SL260

[0381] SL260

[0382] 1-3

[0383]

[0224] Compound 1-3 (3.00 g, 5.69 mmol, 1.00 eq), l-methylpiperidine-4- carboxylic acid (815 mg, 5.69 mmol, 1.00 eq) and 1 -isocyanobutane (473 mg, 5.69 mmol, 59 pL, 1.00 eq) was stirred in a 8 mL flask, at 115 °C for 72 hr. LCMS (EW57877- 1-P1A, Pl:Rt = 1.964 min ) showed reactant (Rt = 3.246 min) remained, TLC(Dichloromethane : Methanol =10: 1, Pl:Rf = 0.38). The residue was purified by flash silica gel chromatography (ISCO®; 20 g+20 g SepaFlash® Silica Flash Column, Eluent of 0~2~5% MeOH / DCM gradient @ 40 mL / min). Compound SL260 (300 mg, 391 pmol, 6.88% yield, 98.4% purity) was obtained as a brown oil. LCMS Rt = 2.569 min. 'H NMR (400 MHz, CDCh) 5 6.44 (t, J = 5.8 Hz, 1H), 5.23 - 5.48 (m, 1H), 3.30 (q, J = 6.8 Hz, 2H), 2.87 (br d, J = 11.4 Hz, 2H), 2.76 (t, J = 6.4 Hz, 4H), 2.23 - 2.36 (m, 6H), 2.09 - 1.89 (m, 16H), 1.74 - 1.84 (m, 2H), 1.52 (quin, J = 7.4 Hz, 2H), 1.17 - 1.40 (m, 35H), 1.08 (br s, 4H), 0.94 (t, J = 7.4 Hz, 3H), 0.89 (t, J = 6.8 Hz, 6H).

[0384] Preparation of Compound 2-2

[0385] 2-1 2-2

[0386]

[0225] To a solution of Compound 2-1 (10.0 g, 29.2 mmol, 1.00 eq) and nonan-5- ol (10.5 g, 73.0 mmol, 2.50 eq) in THF (200 mL) was added DMAP (7.13 g, 58.4 mmol, 2.00 eq) and EDCI (16.7 g, 87.6 mmol, 3.00 eq). The solution was stirred at 25°C for 12 hrs. TLC showed desired spot (petroleumethe: Ethyl acetate=10: l, Rf = 0.73) was detected. TLC (Petroleum ether: Ethyl acetate =10: 1, Pl: Rf = 0.51). The reaction mixture was added NaHCOs (aq.100 mL) and extracted with Ethyl acetate (200 mL*2).The combined organic was dried over NaiSCL. filtered and concentrated under reduced pressure to give a crude product. The residue was purified by flash silica gel chromatography (ISCO®; 220 g SepaFlash® Silica Flash Column, Eluent of 0~7~10% Ethylacetate / Petroleum ethergradient @ 100 mL / min). Compound 2-2 (9.00 g, 15.1 mmol, 51.8% yield) was obtained as a colorless oil. 'H NMR: (400 MHz, CDCh) 34.87 (t, J = 6.2 Hz, 2H), 2.38 (t, J = 7.4 Hz, 4H), 2.28 (t, J = 7.4 Hz, 4H), 1.42 - 1.59 (m, 13H), 1.18 - 1.40 (m, 35H), 0.86 - 0.94 (m, 14H). Preparation of Compound SL261

[0387]

[0226] Adapted from the synthesis of SL260 to yield Compound SL261. LCMS: Rt = 2.085 min. 'H NMR: (400 MHz, CDCh) 3 6.43 (t, J = 5.8 Hz, 1H), 4.85 (t, J = 6.2 Hz, 2H), 3.28 (q, J = 6.8 Hz, 2H), 2.87 (br d, J = 11.4 Hz, 2H), 2.21 - 2.34 (m, 10H), 1.88- 2.07 (m, 6H), 1.70 - 1.86 (m, 2H), 1.54 - 1.62 (m, 4H), 1.50 (q, J = 6.8 Hz, 10H), 1.15 - 1.39 (m, 36H), 1.06 (br s, 4H), 0.93 (t, J = 7.2 Hz, 4H), 0.87 (t, J = 6.8 Hz, 12H).

[0388] Preparation of Compound 3a

[0389]

[0227] To a solution of DCC (1.57 g, 7.62 mmol, 1.54 mL, 1.00 eq) was added CS2

[0390] (580 mg, 7.62 mmol, 459 pL, 1.00 eq) in THF (10.0 mL) at -10 °C, then Compound 3 (1.00 g, 7.62 mmol, 988 pL, 1.00 eq) in THF (10.0 mL) was added dropwise, the mixture was stirred at -10 °C for 30 mins, then warmed to 25 °C and stirred for 16 hr. TLC (Dichloromethane: Methanol = 10: 1, Pl: Rf = 0.50) showed new spot formed, reactant (Rf = 0.00) was consumed. The mixture was filtered to get the liquid, concentrated to dryness, diluted with n-hexane (20.0 mL), cooled to 0 °C, filtered and concentrated, repeat 3 times to get a clean oil. Compound 3a (1.00 g, crude) was obtained as a brown oil. 'H NMR: (400 MHz, CDCh) 3 4.30 (quin, J = 5.4 Hz, 1H), 4.12 (dd, J = 6.4, 8.8 Hz, 1H), 3.85 (dd, J = 5.0, 8.8 Hz, 1H), 3.64 - 3.72 (m, 1H), 3.54 - 3.63 (m, 1H), 1.48 (s, 3H), 1.37 (s, 3H). Preparation of Compound 3-2

[0391]

[0228] In a 8 mL flask, Compound 1-3 (3.00 g, 5.69 mmol, 1.00 eq) and 4-(tert- butoxycarbonylamino)butanoic acid (1.16 g, 5.69 mmol, 1.00 eq) were stirred for 30 min, then 1 -isocyanobutane (473 mg, 5.69 mmol, 595 pL, 1.00 eq) was added, the mixture was stirred at 120 °C for 72 hrs. TLC (Petroleum ether: Ethyl acetate = 9:1, Pl: Rf = 0.21) showed most reactant remained. The residue was purified by flash silica gel chromatography (ISCO®; 20 g +20 g SepaFlash® Silica Flash Column, Eluent of 0-10% Ethyl acetate / Petroleum ether gradient @ 30 mL / min). LCMS (EW57877-53-f2, Pl: Rt = 3.210 min) showed 100% purity. Compound 3-2 (800 mg, 983 pmol, 8.64% yield) was obtained as a brown oil. LCMS: Rt = 3.210 min.

[0392] Preparation of Compound 3-3

[0393]

[0229] Compound 3-2 (800 mg, 983 pmol, 1.00 eq) was added into HCl / EtOAc (2 M, 10.0 mL, 20.3 eq), stirred at 25 °C for 3 hrs. LCMS (Rt = 1.904 min) showed reactant (Rt = 3.210 min) consumed. The solvent was removed in vacuum to get a brown oil. Compound 3-3 (900 mg, crude, HC1) was obtained as a brown oil.

[0394] Preparation of Compound 3-5

[0395]

[0230] Compound 3-3 (740 mg, 987 pmol, 1.00 eq, HC1) dissolved in DCM (3.00 mL) was added TEA (399 mg, 3.95 mmol, 549 pL, 4.00 eq), cooled to 0 °C, 3a (1.00 g, 5.77 mmol, 5.85 eq) in DCM (1.00 mL) was added, the mixture was stirred at 25 °C for 6 hrs. LCMS (Rt = 3.033 min) showed reactant (Rt = 1.933 min) remained, TLC (Petroleum ether: Ethyl acetate = 3: 1, Pl: Rf = 0.31). The mixture was extracted by EtOAc (20.0 mL*3), washed with brines (20.0 mL), dried by NaiSCU, concentrated in vacuum. The residue was purified by flash silica gel chromatography (ISCO®; 20 g SepaFlash® Silica Flash Column, Eluent of 0-10% Ethyl acetate / Petroleum ether gradient @ 30 mL / min). LCMS (Rt = 3.024 min) showed 91.8% purity. Compound 3-5 (800 mg, 902 pmol, 91.4% yield) was obtained as a brown oil. LCMS: Rt = 3.024 min.

[0396] Preparation of Compound SL262

[0397]

[0231] Compound 3-5 (700 mg, 789 pmol, 1.00 eq) was dissolved in THF (10.0 mL), cooled to 0 °C, HC1 (2 M, 5.83 mL, 14.7 eq) was added, stirred at 25 °C for 3 hrs. LCMS (Rt = 2.825 min) showed reactant (Rt = 3.024 min) consumed, TLC (Dichloromethane: Methanol = 9: 1, Pl: Rf = 0.38). The mixture was quenched with NaHCCh solution (20.0 mL), extracted by EtOAc (20.0 mL*2), washed with brines (20.0 mL), concentrated to dryness. The residue was purified by flash silica gel chromatography (ISCO®; 20 g SepaFlash® Silica Flash Column, Eluent of 0~2%~4%MeOH / DCM gradient @ 40 mL / min). Compound SL262 (500 mg, 590 pmol, 74.8% yield, 100% purity) was obtained as a colorless oil. LCMS: Rt = 3.74 min. 'H NMR: (400 MHz, CDCh) d 7.01 (br s, 1H), 6.20 (br s, 1H), 5.23 - 5.50 (m, 8H), 3.80 - 3.90 (m, 1H), 3.48 - 3.76 (m, 6H), 3.37 - 3.46 (m, 1H), 3.29 (q, J = 6.6 Hz, 2H), 2.77 (br t, J = 6.2 Hz, 4H), 2.43 (br t, J = 6.2 Hz, 2H), 1.90 -2.3 (m, 14H), 1.87 (br s, 3H), 1.46 - 1.58 (m, 2H), 1.20 - 1.42 (m, 35H), 1.05 - 1.18 (m, 3H), 0.82 - 0.99 (m, 9H). Preparation of Compound SL263

[0398] SL263

[0399]

[0232] Adapted from the synthesis of SL262 to yield Compound SL263. LCMS: Rt = 3.21 min. 'H NMR: (400 MHz, CDCh) 5 7.20 - 6.67 (m, 2H), 6.30 (br s, 1H), 4.86 (quin, J = 6.2 Hz, 2H), 3.90 - 3.73 (m, 2H), 3.69 - 3.51 (m, 4H), 3.23 - 3.35 (m, 2H), 2.43 (br t, J = 6.8 Hz, 2H), 2.28 (t, J = 7.4 Hz, 3H), 1.88- 2.15 (m, 4H), 1.55 - 1.65 (m, 4H), 1.51 (q, J = 6.8 Hz, 9H), 1.20 - 1.39 (m, 34H), 1.05 - 1.19 (m, 4H), 0.94 (t, J = 7.4 Hz, 3H), 0.88 (t, J = 6.8 Hz, 12H).

[0400] Preparation of Compound 5-2

[0401]

[0233] Compound 1-3 (3.00 g, 5.69 mmol, 1.00 eq), 1 -isocyanobutane (473 mg, 5.69 mmol, 595 pL, 1.00 eq) and Compound 1-3A (1.45 g, 5.69 mmol, 1.00 eq) were stirred at 115 °C for 72 h. LCMS (EW57877-27-P1B, Pl: Rt = 2.135 min) showed 2.98% product formed, reactant (Rt = 3.311 min) remained. The residue was purified by flash silica gel chromatography (ISCO®; 20 g+20 g SepaFlash® Silica Flash Column, Eluent of 0~2~5% MeOH / DCM gradient @ 40 mL / min). LCMS (EW57877-27-f2B, Pl: Rt = 2.086 min) showed MS 865.8. Compound 5-2 (800 mg, 924 pmol, 8.12% yield) was obtained as a brown oil. LCMS: Rt = 2.086 min. Preparation of Compound 5-3

[0402]

[0234] Compound 5-2 (800 mg, 924 pmol, 1.00 eq) was dissolved in HCl / EtOAc (2 M, 5.00 mL, 10.8 eq) and H2O (16.6 mg, 924 pmol, 16.6 pL, 1.00 eq) EtOAc (0.50 mL), the mixture was stirred at 25 °C for 5 h. LCMS (Rt = 1.330 min) showed reactant (Rt =2.086 min) consumed. The solvent was removed under reduce pressure. Compound 5-3 (741 mg, 924 pmol, 99.9% yield, HC1) was obtained as a brown oil.

[0403] Preparation of Compound SL264

[0404]

[0235] Compound 5-3 (741 mg, 924 pmol, 1.00 eq, HC1) was dissolved in dioxane (5.00 mL) and H2O (5.00 mL) at 0 °C, added tert-butyl nitrite (190 mg, 1.85 mmol, 219 pL, 2.00 eq) ,then TFA (210 mg, 1.85 mmol, 137 pL, 2.00 eq) was added by syringe, the mixture was stirred at 25 °C for 1 h. LCMS (Rt = 1.960 min) showed reactant (Rt = 1.330 min) consumed, TLC (Dichloromethane: Methanol = 10: 1, Pl: Rf =0.50). The mixture was extracted by EtOAc (20.0 mL*2), washed with NaHCOs solution (15.0 mL), dried by Na2SO4, concentrated to dryness. The residue was purified by flash silica gel chromatography (ISCO®; 12 g+12 g SepaFlash® Silica Flash Column, Eluent of 0~3% MeOH / DCM gradient @ 30 mL / min). Compound SL264 (100 mg, 130 pmol, 14.1% yield, 100% purity) was obtained as a brown oil. LCMS: Rt = 2.531 min. 'H NMR: (400 MHz, CDCh) 5 7.49 - 7.80 (m, 1H), 6.74 - 7.06 (m, 1H), 5.19 - 5.63 (m, 7H), 4.48 (br t, J = 4.8 Hz, 1H), 3.95 (s, 1H), 3.19 - 3.42 (m, 3H), 3.15 (br d, J = 4.8 Hz, 2H), 2.59 - 2.84 (m, 4H), 2.22 - 2.44 (m, 1H), 1.82 - 2.18 (m, 12H), 1.46 - 1.61 (m, 4H), 1.04 - 1.44 (m, 42H), 0.72 - 0.99 (m, 11H). Preparation of Compound SL265

[0405] SL265

[0406]

[0236] Adapted from the synthesis of SL264 to yield Compound SL265. LCMS: Rt = 1.956 min. 'H NMR: (400 MHz, CDCh) 5 7.55 (s, 1H), 6.89 (s, 1H), 4.87 (quin, J = 5.8 Hz, 2H), 4.50 (s, 1H), 3.28 (br dd, J = 6.2, 10.8 Hz, 2H), 3.15 (br d, J = 4.6 Hz, 1H), 2.18 - 2.36 (m, 4H), 1.81 - 2.18 (m, 3H), 1.44 - 1.66 (m, 12H), 1.12 - 1.40 (m, 31H), 1.08 (br d, J = 4.6 Hz, 3H), 0.81 - 0.97 (m, 14H).

[0407] Preparation of SL266

[0408]

[0237] In a 8 mL flask, Compound 2 (3.00 g, 5.04 mmol, 1.00 eq), 2-(l-methyl- 4-piperidyl)acetic acid (792 mg, 5.04 mmol, 1.00 eq) and 1 -isocyanobutane (419 mg, 5.04 mmol, 527 pL, 1.00 eq) was added into, sealed the tube, heated to 115 °C, stirred for 72 h. LCMS showed 11.6% product peak, TLC (Dichloromethane: Methanol = 9:1, Pl: Rf = 0.40) showed reactant (Rf = 0.98) remained. The residue was purified by flash silica gel chromatography (ISCO®; 20 g+20 g SepaFlash® Silica Flash Column, Eluent of 0~2~4% MeOH / DCM gradient @ 40 mL / min). SL266 (200 mg, 236 pmol, 4.68% yield, 98.6% purity) was obtained as a brown oil. LCMS: Rt = 2.094 min. 'H NMR: (400 MHz, CDCh) 5 6.41 (br s, 1H), 4.68 - 4.95 (m, 2H), 3.27 (br d, J = 6.0 Hz, 2H), 2.91 - 3.16 (m, 3H), 2.37 - 2.52 (m, 3H), 2.08 - 2.34 (m, 10H), 1.71 - 2.05 (m, 6H), 1.40- 1.70 (m, 18H), 1.11 - 1.39 (m, 36H), 1.06 (br s, 4H), 0.68 - 0.97 (m, 16H). Preparation of Compound SL267

[0409] SL267

[0410]

[0238] Adapted from the synthesis of SL266 to yield Compound SL267. LCMS:

[0411] Rt = 2.570 min. 'H NMR: (400 MHz, CDCh) 5 6.43 (t, J = 5.8 Hz, 1H), 5.20 - 5.47 (m, 9H), 3.21 - 3.37 (m, 3H), 2.89 - 3.09 (m, 3H), 2.76 (br t, J = 6.4 Hz, 4H), 2.36 - 2.50 (m, 3H), 2.21 - 2.36 (m, 4H), 2.10 - 2.20 (m, 2H), 1.90 - 2.09 (m, 10H), 1.72 - 1.87 (m, 3H), 1.43 - 1.59 (m, 5H), 1.17 - 1.41 (m, 36H), 1.09 (br d, J = 5.0 Hz, 4H), 0.82 - 0.98 (m, 10H).

[0412] Preparation of Compound SL268

[0413] SL268

[0414]

[0239] Adapted from the synthesis of SL266 to yield Compound SL268. LCMS: Rt = 2.161 min. 'H NMR: (400 MHz, CDCh) 5 6.17 (br s, 1H), 4.85 (quin, J = 6.2 Hz, 2H), 3.22 - 3.37 (m, 2H), 2.75 - 2.97 (m, 2H), 2.62 (br s, 2H), 2.46 (s, 3H), 2.25 (t, J = 7.4 Hz, 4H), 2.05 - 2.21 (m, 4H), 1.97 (ddd, J = 5.6, 10.8, 13.6 Hz, 2H), 1.79 (br t, J = 11.0 Hz, 2H), 1.42 - 1.65 (m, 14H), 1.05 - 1.41 (m, 41H), 0.83 - 0.96 (m, 15H). Preparation of Compound SL269

[0415]

[0240] Adapted from the synthesis of SL266 to yield Compound SL269. LCMS: Rt = 2.639 min. 'H NMR: (400 MHz, CDCh) 5 5.86 - 6.22 (m, 1H), 5.11 - 5.42 (m, 8H), 3.16 - 3.31 (m, 2H), 2.78 - 2.94 (m, 2H), 2.67 - 2.76 (m, 4H), 2.65 (br s, 1H), 2.44 (s, 3H), 2.04 (br s, 4H), 1.93 - 2.02 (m, 9H), 1.72 - 1.86 (m, 2H), 1.45 (td, 7 = 7.2, 14.6 Hz, 3H), 1.13- 1.36 (m, 40H), 1.01 - 1.13 (m, 4H), 0.85 - 0.90 (m, 3H), 0.82 (t, J = 7.0 Hz, 6H).

[0416] Preparation of Compound SL274

[0417]

[0241] Adapted from the synthesis of SL266 to yield Compound SL274. LCMS: Rt = 3.422 min. 'H NMR: (400 MHz, CDCh) 5 7.41 (t, J = 5.8 Hz, 1H), 4.86 (quin, J = 6.4 Hz, 2H), 3.17 - 3.38 (m, 2H), 2.92 - 3.01 (m, 1H), 2.86 - 2.92 (m, 1H), 2.75 - 2.85 (m, 1H), 2.51 (dd, J = 7.8, 9.4 Hz, 1H), 2.36 - 2.41 (m, 3H), 2.18 - 2.32 (m, 6H), 2.06 (dtd, J = 5.2, 7.8, 12.8 Hz, 1H), 1.80- 1.98 (m, 3H), 1.54 - 1.62 (m, 4H), 1.45 - 1.54 (m, 9H), 1.16 - 1.40 (m, 36H), 1.10 (br s, 4H), 0.83- 0.98 (m, 15H). Preparation of Compound SL276

[0418]

[0242] Adapted from the synthesis of SL266 to yield Compound SL276. LCMS:

[0419] Rt = 3.436 min. 'H NMR: (400 MHz, CDCh) 5 6.68 (t, J = 5.9 Hz, 1H), 4.86 (quin, J = 6.3 Hz, 2H), 3.20 - 3.37 (m, 2H), 2.53 - 2.69 (m, 3H), 2.41 - 2.51 (m, 3H), 2.31 - 2.37 (m, 4H), 2.19 - 2.30 (m, 6H), 2.06 - 2.18 (m, 1H), 1.92 - 2.00 (m, 2H), 1.89 (br s, 2H), 1.55 - 1.63 (m, 4H), 1.51 - 1.55 (m, 4H), 1.43 - 1.49 (m, 2H), 1.18 - 1.39 (m, 36H), 1.03 - 1.15 (m, 4H), 0.86 - 0.97 (m, 15H).

[0420] Preparation of Compound SL277

[0421] SL277

[0422]

[0243] Adapted from the synthesis of SL266 to yield Compound SL277. LCMS: Rt = 3.436 min. 'H NMR: (400 MHz, CDCh) 5 6.65 (br t, J = 5.8 Hz, 1H), 5.17 - 5.50 (m, 8H), 3.28 (q, J = 6.8 Hz, 2H), 2.84 - 3.05 (m, 2H), 2.76 (br t, J = 6.4 Hz, 4H), 2.55 - 2.73 (m, 4H), 2.53 (s, 3H), 2.14 - 2.31 (m, 3H), 1.99 - 2.09 (m, 8H), 1.91 - 1.98 (m, 1H), 1.60 - 1.73 (m, 1H), 1.52 (quin, J = 7.4 Hz, 3H), 1.16 - 1.40 (m, 35H), 1.01 - 1.15 (m, 4H), 0.85 - 0.97 (m, 9H). Preparation of Compound 273-2

[0423]

[0244] In a 8 mL flask, Compound b (3.00 g, 5.69 mmol, 1.00 eq), Compound C4b (1.31 g, 5.69 mmol, 1.00 eq) and 1 -isocyanobutane (473 mg, 5.69 mmol, 595 pL, 1.00 eq) was added into, sealed the tube, heated to 115 °C, stirred for 72 h. LCMS (Rt = 3.253 min) showed reactant (Rt = 3.253 min) remained, TLC (Petroleum ether: Ethyl acetate = 9: 1, Pl: Rf = 0.17). The residue was purified by flash silica gel chromatography (ISCO®; 20 g+20 g SepaFlash® Silica Flash Column, Eluent of 0~7%~14% Ethyl acetate / Petroleum ether gradient @ 40 mL / min). Compound 273-2 (600 mg, 714 pmol, 12.5% yield) was obtained as a brown oil. LCMS: Rt = 3.269 min.

[0424] Preparation of Compound 273-1

[0425]

[0245] Compound 273-2 (600 mg, 714 pmol, 1.00 eq) was dissolved in HCI / EtOAc (2 M, 20.0 mL, 55.9 eq), stirred at 25 °C for 1.5 h. LCMS (Rt = 1.985 min) showed reactant (Rt = 3.269 min) consumed. The solvent was removed in vacuum, diluted with DCM (10.0 mL), concentrated to dryness. Compound 273-1 (550 mg, 709 pmol, 99.1% yield, HC1) was obtained as a brown oil. LCMS: Rt = 1.985 min.

[0426] Preparation of Compound SL273

[0427]

[0246] Compound 273-1 (550 mg, 709 pmol, 1.00 eq, HC1) dissolved in DCM (6.00 mL) was added acetone (395 mg, 6.80 mmol, 0.50 mL, 9.59 eq) , AcOH (85.1 mg, 1.42 mmol, 81.1 pL, 2.00 eq), the mixture was stirred at 25 °C for 5 h, then NaBH(OAc)3 (225 mg, 1.06 mmol, 1.50 eq) was added into at 0 °C, the mixture was stirred at 35 °C for 15 h. LCMS (Rt = 2.067 mn) showed reactant (Rt = 1.985 min) consumed, TLC (Dichloromethane: Methanol = 10: 1, Pl: Rf = 0.38). The mixture was quenched by NaHCCh solution (15.0 mb), extracted by EtOAc (50.0 mL*2), dried by NaiSCE, concentrated to dryness. The residue was purified by flash silica gel chromatography (ISCO®; 12 g SepaFlash® Silica Flash Column, Eluent of 0~l%~2% MeOH / DCM gradient @ 30 mL / min). SL273 (350 mg, 445.29 pmol, 62.8% yield, 99.4% purity) was obtained as a brown oil. LCMS: Rt = 2.629 min. 'H NMR: (400 MHz, CDCh) 5 6.47 (br s, 1H), 5.26 - 5.46 (m, 8H), 3.30 (q, J = 6.8 Hz, 2H), 2.93 (br d, J = 11.4 Hz, 2H), 2.77 (br t, J = 6.4 Hz, 5H), 2.17 - 2.40 (m, 5H), 2.00 - 2.09 (m, 8H), 1.89 - 2.00 (m, 4H), 1.74 - 1.88 (m, 2H), 1.52 (quin, 7 = 7.4 Hz, 2H), 1.18 - 1.40 (m, 36H), 1.07 (br d, J = 6.4 Hz, 9H), 0.94 (t, J = 7.4 Hz, 3H), 0.89 (t, J = 6.8 Hz, 6H).

[0428] Preparation of Compound SL275

[0429] SL275

[0430]

[0247] Adapted from the synthesis of SL273 to yield Compound SL275. LCMS: Rt = 2.554 min. 'H NMR: (400 MHz, CDCh) 5 7.40 (br t, J = 5.6 Hz, 1H), 5.26 - 5.48 (m, 8H), 3.17 - 3.38 (m, 2H), 2.94 - 3.03 (m, 1H), 2.90 (dd, J = 3.8, 9.5 Hz, 1H), 2.80 - 2.85 (m, 1H), 2.77 (t, J = 6.4 Hz, 4H), 2.49 - 2.57 (m, 1H), 2.39 (s, 3H), 2.14 - 2.33 (m, 3H), 1.99 - 2.12 (m, 9H), 1.82 - 1.98 (m, 3H), 1.46 - 1.56 (m, 2H), 1.21 - 1.40 (m, 36H), 1.06 - 1.16 (m, 4H), 0.94 (t, J = 7.4 Hz, 3H), 0.89 (t, J = 6.8 Hz, 6H). Preparation of Compound SL270

[0431]

[0248] Adapted from the synthesis of SL273 to yield Compound SL270. LCMS: Rt = 3.470 min. 'H NMR: (400 MHz, CDCh) 5 6.28 - 6.55 (m, 1H), 4.86 (quin, J = 6.4 Hz, 2H), 3.30 (q, J = 6.8 Hz, 2H), 2.81 - 2.96 (m, 1H), 2.57 - 2.80 (m, 1H), 2.44 - 2.56 (m, 1H), 2.20 - 2.31 (m, 9H), 1.84 - 2.03 (m, 5H), 1.79 (br dd, J = 10.0, 12.4 Hz, 1H), 1.55 - 1.63 (m, 4H), 1.46 - 1.54 (m, 9H), 1.17 - 1.38 (m, 36H), 1.04 - 1.15 (m, 6H), 0.92 - 0.97 (m, 4H), 0.88 (t, J = 6.8Hz, 12H).

[0432] Preparation of Compound SL271

[0433]

[0249] Adapted from the synthesis of SL273 to yield Compound SL271. LCMS: Rt = 3.708 min. 'H NMR: (400 MHz, CDCh) 5 6.41 (t, J = 5.8 Hz, 1H), 5.23 - 5.46 (m, 8H), 3.21 - 3.35 (m, 2H), 2.77 (t, J = 6.4 Hz, 5H), 2.57 - 2.68 (m, 1H), 2.45 - 2.55 (m, 1H), 2.18 - 2.37 (m, 7H), 2.04 (quin, J = 6.8 Hz, 8H), 1.90 - 2.00 (m, 3H), 1.70 - 1.89 (m, 2H), 1.52 (quin, J = 7.4 Hz, 2H), 1.19 - 1.40 (m, 36H), 1.05 - 1.13 (m, 6H), 0.92 - 0.98 (m, 3H), 0.89 (t, J = 6.8 Hz, 6H). Preparation of Compound SL272

[0434] SL272

[0435]

[0250] Adapted from the synthesis of SL273 to yield Compound SL272. LCMS: Rt = 2.162 min. 'H NMR: (400 MHz, CDCh) 5 6.45 (br t, J = 5.6 Hz, 1H), 4.86 (quin, J = 6.4 Hz, 2H), 3.29 (q, J = 7.0 Hz, 2H), 2.91 - 3.03 (m, 2H), 2.76 - 2.90 (m, 1H), 2.30 - 2.43 (m, 3H), 2.26 (t, J = 7.6 Hz, 6H), 1.78 - 2.04 (m, 6H), 1.55 - 1.64 (m, 5H), 1.51 (q, J = 6.8 Hz, 9H), 1.17 - 1.38 (m, 36H), 1.09 (d, 7 = 6.4 Hz, 9H), 0.91 - 0.96 (m, 3H), 0.88 (t, J = 6.8 Hz, 12H).

[0436] Example 2: Formulation of ionizable cationic lipids into LNPs with a mRNA

[0437]

[0251] This is a general description of how each ionizable cationic lipid was used to formulate an saRNA LNP. The specifics for each lipid are listed in Table 1. The ionizable cationic lipid (see Table 1), l,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), cholesterol, and l,2-dimyristoyl-rac-glycero-3 -methylpolyoxyethylene (DMG- PEG) were combined in a 40: 10:48:2 molar ratio in ethanol at a concentration of 3.2 mM (for 0.5 mg saRNA scale) or 6.4 mM (for 1.5 mg saRNA scale). A solution of saRNA expressing the antigen of interest in 50 mM citrate buffer at pH 6 with 10 mM Tris (2- carboxyethyl) phosphine (TCEP) was prepared. When mixing at an aqueous to ethanol flow rate ratio (FRR) of 2: 1, the RNA concentration was 0.025 mg / mL (for 0.5 mg saRNA scale) or 0.050 mg / mL (for 1.5 mg saRNA scale). When mixing at an aqueous to ethanol flow rate ratio (FRR) of 3: 1, the RNA concentration was 0.017 mg / mL (for 0.5 mg saRNA scale) or 0.034 mg / mL (for 1.5 mg saRNA scale). The lipid solution in ethanol was then rapidly mixed with the saRNA solution using a staggered herringbone micromixer chip using a Nanoassemblr benchtop instrument (Precision Nanosystems) at a total flow rate (TFR) of 12 mL / min and a flow rate ratio (FRR) of either 2: 1 or 3: 1 aqueous buffer to ethanol. This mixing ratio results in a 8: 1 molar ratio of ionizable cationic lipid (see Table 1) to saRNA phosphate groups and a total lipid to saRNA mass ratio of 37: 1. The resulting mixed solution was then diluted 10-fold into 50 mM citrate buffer at pH 4 or pH 6 with 10 mM TCEP and subjected to tangential flow filtration (TFF) using a 300k molecular weight cut-off membrane (mPES) until concentrated to the original volume. Subsequently, the citrate buffer was replaced with a buffer containing 20 mM Tris buffer at pH 7.5, 80 mM sodium chloride, and 3% sucrose using diafiltration with 10 diavolumes. The LNP solution was concentrated to a volume between 4-10 mL, filtered using a 0.2 micron PES syringe filter, aliquoted into vials, and frozen at l°C / min using a Coming® CoolCell® LX Cell Freezing Container until the samples reached -80°C. Samples were stored at -80°C and thawed on wet ice before analysis or use. The total RNA concentration, the percentage of input RNA recovered (% recovery), and the encapsulation efficiency (%EE) were determined using a Ribogreen assay, which is described elsewhere. The Z-avg diameter (nm) and polydispersity index (PDI) were measured using dynamic light scattering (Malvern Zetasizer) following a 1: 100 dilution in phosphate buffered saline (PBS).

[0438] Biophysical characterization of lipid nanoparticles

[0439]

[0252] The RNA-containing LNP compositions were characterized using analytical methods to determine the loading of RNA, the percentage of RNA that is encapsulated, the size of the particles, and the surface charge of the particles. The total amount of RNA contained in the sample and the percentage of that RNA that is encapsulated was determined using a fluorescence assay employing a dye that becomes more emissive upon binding RNA, such as Ribogreen. The total amount of RNA was determined by disrupting the LNP with a detergent to expose the encapsulated RNA, adding the dye, and comparing the emission intensity against a standard curve prepared using ribosomal RNA. The amount of unencapsulated RNA was estimated in a similar manner if the detergent disruption of the LNP is omitted. With the total amount of RNA known and the amount of unencapsulated RNA known, the percent encapsulated RNA was calculated:

[0440] Percent Encapsulation (%) = ((RNATOTAL - RNAUNENCAPSULATED) / RNATOTAL) X 100 where RNATOTAL and RNAUNENCAPSULATED are, respectively, the concentrations of total RNA and unencapsulated RNA. The size of LNP was estimated using dynamic light scattering of a sample diluted in an appropriate medium, such as purified water or PBS buffer. The surface charge of the particle was characterized by using dynamic light scattering to determine the zeta potential of a sample diluted in purified water or another appropriate aqueous buffer. The size of the particle was measured by DLS.

[0441] Characterization of the in vitro potency of LNPs

[0442]

[0253] The ability of the samRNA-LNPs to transfect cultured cells was characterized using a high throughput microscopy imaging-based assay. In summary, 4xl05BHK-21 cells were incubated with a concentration range of the LNPs varying from 0-1 ng in presence of 4% FBS and the DMEM media for over 18 hr in a PS-96 well flatbottom plates at 37 °C with 5% CO2. Subsequently, the cells are fixed and permeabilized using the BD Cytofix / Perm kit) reagent, followed by staining with the (in- house) human-anti-H5 specific antibody using the Thermofisher cy5-zenon-anti-human labelling kit and DAPI. The plates are further imaged using Agilent high throughput cytation5 instrument. The analysis is performed by counting the DAPI spots as the total cell number and the cy-5 red spots as the number of antigen positive cells. To increase the linearity range of the assay, the absolute value of natural log of percentage of negative cells i.e., ln(l -(total red spot) / (total blue spots)) was calculated. Reference lipid LKY750 (2,5-bis((9z,12z)-octadeca-9,12,dien-l-yloxyl)benzyl-4-(dimethylamino)butanoate;

[0443] WO 2016 / 037053 herein incorporated by reference) was always included as a positive control for normalization. The normalized absolute numbers of lipids to LKY750 were reported. The higher the normalized absolute value for a sample, the higher the transfection rate of that particular LNP chemistry is. The assay exhibits average value of 20% with minimum and maximum of 10 and 30% variability in nature, respectively.

[0444]

[0254] The results are depicted in FIG 1, in which the potency of each of the lipid formulations is assessed relative to LKY750 control. The FACS potency results indicate the assessed lipid formulations show improved in vitro potency to the LKY750 control CY087.

[0445] Characterization of the in vivo potency of lipid nanoparticles

[0446]

[0255] The ability of an saRNA LNP to act as a vaccine was evaluated using a in vivo mouse immunogenicity study. Groups of 10, 6-8 week old female Balb / c mice were administered either 0.1 pg saRNA LNP or 0.001 pg saRNA as an intramuscular injection on study day 0 and and on study day 21. On study day 42, the mice were euthanised and serum and spleens were collected for serological and cell-based immune assays. The vaccine antibody response in serum was measured using a H5-binding IgG ELISA, a hemagglutination inhibition assay (HAI), a pseudovirus microneutralization assay (MN), and an enzyme linked lectin assay (ELLA). As shown in FIGs 2 and 3, LNPs encapsulating saRNA expressing influenza antigens H5 and N1 led to high levels of neutralizing antibodies in mice as measured by a hemagglutination inhibition (HAI) assay and a pseudovirus microneutralization (MN) assay following a prime-boost vaccination schedule. At a 0.1 pg saRNA dose, the values for several lipids of the present disclosure, including SL112 and SL113, were comparable to those elicited by an inactivated virus vaccine adjuvanted with MF59 (LKY750).

[0447] Table 1. Example formulations with ionisable cationic lipids SL112 and SL113.

[0448] ITEMIZED LIST OF EMBODIMENTS

[0449] 1. A compound of Formula A:

[0450] Formula A; wherein W is selected from the group consisting of Formula Al, Formula All, and wherein

[0451] R1and R2are each independently selected from the group consisting of -H, -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0452] X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2; wherein

[0453] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6; R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-CioalkcnyL and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyk and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0454] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0455] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0456] L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0457] Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; and

[0458] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0459] 2. The compound of item 1, wherein the compound is of Formula Ala:

[0460]

[0461] Formula Ala; wherein

[0462] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0463] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0464] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0465] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0466] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0467] L\ L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0468] Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; and

[0469] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0470] 3. The compound of item 1, wherein the compound is of Formula Alla:

[0471] Formula Alla; wherein

[0472] X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2;

[0473] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0474] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0475] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0476] L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0477] Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; and

[0478] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0479] 4. The compound of item 1, wherein the compound is of Formula Allla:

[0480] Formula Allla; wherein

[0481] V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;

[0482] R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-Cioalkcnyl, and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyk and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;

[0483] R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:

[0484] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0485] L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0486] Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; and

[0487] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0488] 5. The compound of item 1, wherein the compound is of Formula I:

[0489] Formula I; wherein n is an integer from 0 to 6;

[0490] R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;

[0491] R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; and

[0492] R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:

[0493] Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;

[0494] L\ L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;

[0495] Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; and

[0496] R7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

[0497] 6. The compound of item 1, wherein V is -H.

[0498] 7. The compound of item 1, wherein X1is -H.

[0499] 8. The compound of item 1, wherein X1is -Cialkyl.

[0500] 9. The compound of item 1, wherein X2is -H.

[0501] 10. The compound of item 1, wherein X3is -Cialkyl.

[0502] 11. The compound of item 1, wherein t is 2.

[0503] 12. The compound of item 1, wherein u is 1.

[0504] 13. The compound of item 1, wherein R1is -Ci-Ci2alkyl.

[0505] 14. The compound of item 1, wherein R1is -Ci-Csalkyl.

[0506] 15. The compound of item 1, wherein R2is -Ci-Ci2alkyl.

[0507] 16. The compound of item 1, wherein R2is -Ci-Csalkyl.

[0508] 17. The compound of item 1, wherein R1and R2cyclise together to form a 5-7- membered heterocyclyl.

[0509] 18. The compound of item 1, wherein R1and R2cyclise together to form a 5- membered heterocyclyl.

[0510] 19. The compound of item 1, wherein R1and R2cyclise together to form a 6- membered heterocyclyl.

[0511] 20. The compound of item 1, wherein R1and R2cyclise together to form a 6- membered heterocyclyl substituted with one -Ci-Cealkyl substituent.

[0512] 21. The compound of item 1, wherein R1and R2cyclise together to form a 7- membered heterocyclyl.

[0513] 22. The compound of item 1, wherein R3is -H and R4is -Ci-Cealkyl.

[0514] 23. The compound of item 1, wherein R3is -H and R4is -C4alkyl. 24. The compound of item 1, wherein n is 3.

[0515] 25. The compound of item 1, wherein R5is Formula la.

[0516] 26. The compound of item 1, wherein R5is Formula la, and m is 0.

[0517] 27. The compound of item 1, wherein R5is Formula la, and Q1is -Ci-Ci2alkyl-.

[0518] 28. The compound of item 1, wherein R5is Formula la, Q1is -Ci-Ci2alkyl-, and L1is

[0519] -O(C=O)-.

[0520] 29. The compound of item 1, wherein R5is Formula lb.

[0521] 30. The compound of item 1, wherein R5is Formula lb, and Q2is -Ci-Ci2alkyl-.

[0522] 31. The compound of item 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, and L2is

[0523] -O(C=O)-.

[0524] 32. The compound of item 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, L2is - O(C=O)-, p is 1, and q is 1.

[0525] 33. The compound of item 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, L2is - O(C=O)-, m is 1, p is 1, L3is -O(C=O)-, and L4is -O(C=O)-.

[0526] 34. The compound of item 1, wherein R5is -C2-C3oalkyl.

[0527] 35. The compound of item 1, wherein R5is -C2-C3oalkenyl.

[0528] 36. The compound of item 1, wherein R5is Formula la and R6is -Ci-Csoalkyl.

[0529] 37. The compound of item 1, wherein R5is Formula la and R6is -C2-C3oalkenyl.

[0530] 38. The compound of item 1, wherein R5is Formula lb and R6is -Ci-Csoalkyl.

[0531] 39. The compound of item 1, wherein R5is Formula lb and R6is -C2-C3oalkenyl.

[0532] 40. The compound of item 1, wherein the compound of Formula I is selected from

[0533]

[0534]

[0535] 41. A lipid nanoparticle (LNP) comprising a lipid component comprising a compound of any one of items 1 to 40.

[0536] 42. The lipid nanoparticle of item 41, wherein the lipid component further comprises one or more of a neutral lipid, a structural lipid, and a PEGylated lipid.

[0537] 43. The lipid nanoparticle of item 42, wherein the neutral lipid is selected from the group consisting of l,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), 1,2-dioleoyl- sn-glycero-3-phosphoethanolamine (DOPE), l,2-dilinoleoyl-sn-glycero-3- phosphocholine (DLPC), 1,2-dimyristoyl-sn-glycero-phosphocholine (DMPC), 1,2- dioleoyl-sn-glycero-3-phosphocholine (DOPC), l,2-dipalmitoyl-sn-glycero-3- phosphocholine (DPPC), 1,2-diundecanoyl-sn-glycero-phosphocholine (DUPC), 1- palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), 1,2-di-O-octadecenyl-sn- glycero-3-phosphocholine (18:0 Diether PC), l-oleoyl-2-cholesterylhemisuccinoyl-sn- glycero-3-phosphocholine (OChemsPC), l-hexadecyl-sn-glycero-3-phosphocholine (C16 Lyso PC), l,2-dilinolenoyl-sn-glycero-3-phosphocholine, 1,2-diarachidonoyl-sn- glycero-3-phosphocholine, l,2-didocosahexaenoyl-sn-glycero-3-phosphocholine, 1,2- diphytanoyl-sn-glycero-3-phosphoethanolamine (ME 16.0 PE), 1,2-distearoyl-sn- glycero-3-phosphoethanolamine, l,2-dilinoleoyl-sn-glycero-3-phosphoethanolamine, l,2-dilinolenoyl-sn-glycero-3-phosphoethanolamine, l,2-diarachidonoyl-sn-glycero-3- phosphoethanolamine, 1 ,2-didocosahexaenoyl-sn-glycero-3-phosphoethanolamine, 1 ,2- dioleoyl-sn-glycero-3-phospho-rac-(l-glycerol) sodium salt (DOPG), and sphingomyelin.

[0538] 44. The lipid nanoparticle of item 42, wherein the structural lipid is selected from the group consisting of cholesterol, fecosterol, sitosterol, campesterol, stigmasterol, brassicasterol, ergosterol, tomatidine, tomatine, ursolic acid and alpha-tocopherol.

[0539] 45. The lipid nanoparticle of item 42, wherein the PEGylated lipid is selected from the group consisting of PEG-modified phosphatidylethanolamines, PEG-modified phosphatidic acids, PEG-modified ceramides, PEG-modified dialkylamines, PEG- modified diacylglycerols, and PEG-modified dialkylglycerols, optionally PEG-c- DOMG, PEG-DMG, PEG-DLPE, PEG-DMPE, PEG-DPPC, and PEG-DSPE.

[0540] 46. The lipid nanoparticle of item 42, wherein the lipid component comprises: about 25 mol % to about 60 mol % of a compound of item 1 ; about 2 mol % to about 25 mol % neutral lipid; about 18.5 mol % to about 60 mol % structural lipid; and about 0.2 mol % to about 10 mol % of PEGylated lipid.

[0541] 47. The lipid nanoparticle of item 42, wherein the lipid nanoparticle further comprises a polynucleotide.

[0542] 48. The lipid nanoparticle of item 47, wherein the polynucleotide is selected from the group consisting of: a messenger RNA (mRNA), a self-amplifying mRNA (sa-mRNA), a small interfering RNA (siRNA), a microRNA (miRNA), miRNA inhibitors (antagomirs / antimirs), messenger-RNA-interfering complementary RNA (micRNA), short hairpin RNA (shRNA), multivalent RNA, dicer substrate RNA, an antisense oligonucleotide, plasmid DNA, DNA, and complementary DNA (cDNA).

[0543] 49. The lipid nanoparticle of item 47, wherein the polynucleotide is a ribonucleic acid (RNA).

[0544] 50. The lipid nanoparticle of item 47, wherein the polynucleotide is a conventional or self-amplifying mRNA.

[0545] 51. The lipid nanoparticle of item 42, wherein the lipid nanoparticle has a diameter of from about 30 nm to about 160 nm.

[0546] 52. A pharmaceutical composition comprising a plurality of lipid nanoparticles of item 42, and a pharmaceutically acceptable carrier.

[0547] 53. A method of delivering a polynucleotide to a mammalian cell, including administering the lipid nanoparticle of item 42, or the pharmaceutical composition of item 52, to a subject to thereby contact the mammalian cell with the lipid nanoparticle or pharmaceutical composition and deliver the polynucleotide to the mammalian cell.

[0548] 54. The method of item 53, wherein the mammalian cell is a human cell. 55. A method of producing a polypeptide of interest in a mammalian cell, including the step of contacting the mammalian cell with a lipid nanoparticle of item 42, or the pharmaceutical composition of item 52, wherein the lipid nanoparticle comprises a conventional mRNA or a self-amplifying mRNA encoding the polypeptide. 56. A method of treating a disease, disorder, or condition in a subject in need of such treatment, comprising administering a lipid nanoparticle of item 42, or the pharmaceutical composition of item 52, to the subject to thereby treat the disease, disorder, or condition.

[0549] 57. The method of item 56, wherein the disease, disorder, or condition is selected from the group consisting of a rare disease, an infectious disease, cancer, a proliferative disease, a genetic disease, an autoimmune disease, diabetes, a neurodegenerative disease, a cardiovascular disease, a reno-vascular disease, and a metabolic disease.

[0550] 58. A vaccine comprising a lipid nanoparticle of item 42, or the pharmaceutical composition of item 52, and an mRNA encoding a polypeptide. 59. The vaccine of item 58, wherein the vaccine is selected from a tumor vaccine and an infectious disease vaccine.

[0551] 60. The vaccine of item 59, wherein the infectious disease vaccine is selected from an influenza vaccine, and a coronavirus vaccine, including a SARS-CoV-2 vaccine.

Claims

1. CLAIMSFormula A; wherein W is selected from the group consisting of Formula Al, Formula All, andwhereinR1and R2are each independently selected from the group consisting of -H, -C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;X1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2; whereinV is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-CioalkcnyL and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyk and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; andR7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

2. The compound of claim 1, wherein the compound is of Formula Ala:Formula Ala; whereinV is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;R5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:Formula lb;wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;L\ L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; andR7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

3. The compound of claim 1, wherein the compound is of Formula Alla:Formula Alla; whereinX1, X2, and X3are each independently selected from the group consisting of -H and -Ci-Ci2alkyl; t is an integer from 1 to 3; and u is an integer from 1 to 2;V is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; andR7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

4. The compound of claim 1, wherein the compound is of Formula Allla:Formula Allla;whereinV is selected from the group consisting of -H and -OH; n is an integer from 0 to 6;R3and R4are each independently selected from the group consisting of -H, -Ci- Cioalkyl, -Ci-Cioalkcnyl, and -Ci-Cioalkynyl; wherein the -Ci-Cioalkyl, -Ci-Cioalkcnyk and -Ci-Cioalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-;R5and R6are each independently selected from the group consisting of -Ci- Csoalkyl, -Ci-Csoalkenyl, Formula la, and Formula lb:Formula lb; wherein m is an integer from 0 to 6; p is an integer from 1 to 6 q is an integer from 1 to 6;L1, !?, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; andR7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

5. The compound of claim 1, wherein the compound is of Formula I:Formula I; wherein n is an integer from 0 to 6;R1and R2are each independently selected from the group consisting of -H, - C(=S)-N(H)-C(H)2-C(H)(OH)-C(H)2(OH)-, and -Ci-Ci2alkyl; or R1and R2cyclise together to form a 5-7-membered heterocyclyl; wherein the 5-7-membered heterocyclyl is optionally substituted with one to six -Ci-Cealkyl substituents;R3and R4are each independently selected from the group consisting of -H, -Ci- C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl; wherein the -Ci-C2oalkyl, -C2-C2oalkenyl, and -C2-C2oalkynyl are optionally interrupted with -O(C=O)- or -(C=O)O-; andR5and R6are each independently selected from the group consisting of -Ci- Caoalkyl, -C2-C3oalkenyl, Formula la, and Formula lb:Formula lb; wherein m is an integer from 0 to 6;p is an integer from 1 to 6 q is an integer from 1 to 6;L\ L2, L3, and L4are each independently selected from the group consisting of -(C=O)O- and -O(C=O)-;Q1and Q2are each independently selected from the group consisting of - Ci-Ci2alkyl- and -C2-Ci2alkenyl-; andR7, R8, R9, and R10are each independently -Ci-Ci2alkyl; or a pharmaceutically acceptable salt or solvate thereof.

6. The compound of claim 1, wherein V is -H.

7. The compound of claim 1, wherein X1is -H.

8. The compound of claim 1, wherein X1is -Cialkyl.

9. The compound of claim 1, wherein X2is -H.

10. The compound of claim 1, wherein X3is -Cialkyl.

11. The compound of claim 1, wherein t is 2.

12. The compound of claim 1, wherein u is 1.

13. The compound of claim 1, wherein R1is -Ci-Ci2alkyl.

14. The compound of claim 1, wherein R1is -Ci-Csalkyl.

15. The compound of claim 1, wherein R2is -Ci-Ci2alkyl.

16. The compound of claim 1, wherein R2is -Ci-Csalkyl.

17. The compound of claim 1, wherein R1and R2cyclise together to form a 5-7- membered heterocyclyl.

18. The compound of claim 1, wherein R1and R2cyclise together to form a 5- membered heterocyclyl.

19. The compound of claim 1, wherein R1and R2cyclise together to form a 6- membered heterocyclyl.

20. The compound of claim 1, wherein R1and R2cyclise together to form a 6- membered heterocyclyl substituted with one -Ci-Cealkyl substituent.

21. The compound of claim 1, wherein R1and R2cyclise together to form a 7- membered heterocyclyl.

22. The compound of claim 1, wherein R3is -H and R4is -Ci-Cealkyl.

23. The compound of claim 1, wherein R3is -H and R4is -C4alkyl.

24. The compound of claim 1, wherein n is 3.

25. The compound of claim 1, wherein R5is Formula la.

26. The compound of claim 1, wherein R5is Formula la, and m is 0.

27. The compound of claim 1, wherein R5is Formula la, and Q1is -Ci-Ci2alkyl-.

28. The compound of claim 1, wherein R5is Formula la, Q1is -Ci-Ci2alkyl-, and L1is -O(C=O)-.

29. The compound of claim 1, wherein R5is Formula lb.

30. The compound of claim 1, wherein R5is Formula lb, and Q2is -Ci-Ci2alkyl-.

31. The compound of claim 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, and L2is -O(C=O)-.

32. The compound of claim 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, L2is - O(C=O)-, p is 1, and q is 1.

33. The compound of claim 1, wherein R5is Formula lb, Q2is -Ci-Ci2alkyl, L2is - O(C=O)-, m is 1, p is 1, L3is -O(C=O)-, and L4is -O(C=O)-.

34. The compound of claim 1, wherein R5is -C2-C3oalkyl.

35. The compound of claim 1, wherein R5is -C2-C3oalkenyl.

36. The compound of claim 1, wherein R5is Formula la and R6is -Ci-Csoalkyl.

37. The compound of claim 1, wherein R5is Formula la and R6is -C2-C3oalkenyl.

38. The compound of claim 1, wherein R5is Formula lb and R6is -Ci-Csoalkyl.

39. The compound of claim 1, wherein R5is Formula lb and R6is -C2-C3oalkenyl.

40. The compound of claim 1, wherein the compound of Formula I is selected from the group consisting of:

41. A lipid nanoparticle (LNP) comprising a lipid component comprising a compound of any one of claims 1 to 40.

42. The lipid nanoparticle of claim 41 , wherein the lipid component further comprises one or more of a neutral lipid, a structural lipid, and a PEGylated lipid.

43. The lipid nanoparticle of claim 42, wherein the neutral lipid is selected from the group consisting of l,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), 1,2-dioleoyl- sn-glycero-3-phosphoethanolamine (DOPE), l,2-dilinoleoyl-sn-glycero-3- phosphocholine (DLPC), 1,2-dimyristoyl-sn-glycero-phosphocholine (DMPC), 1,2- dioleoyl-sn-glycero-3-phosphocholine (DOPC), l,2-dipalmitoyl-sn-glycero-3- phosphocholine (DPPC), 1,2-diundecanoyl-sn-glycero-phosphocholine (DUPC), 1- palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), 1,2-di-O-octadecenyl-sn- glycero-3-phosphocholine (18:0 Diether PC), l-oleoyl-2-cholesterylhemisuccinoyl-sn- glycero-3-phosphocholine (OChemsPC), l-hexadecyl-sn-glycero-3-phosphocholine (C16 Lyso PC), l,2-dilinolenoyl-sn-glycero-3-phosphocholine, 1,2-diarachidonoyl-sn- glycero-3-phosphocholine, l,2-didocosahexaenoyl-sn-glycero-3-phosphocholine, 1,2- diphytanoyl-sn-glycero-3-phosphoethanolamine (ME 16.0 PE), 1,2-distearoyl-sn- glycero-3-phosphoethanolamine, l,2-dilinoleoyl-sn-glycero-3-phosphoethanolamine, l,2-dilinolenoyl-sn-glycero-3-phosphoethanolamine, l,2-diarachidonoyl-sn-glycero-3- phosphoethanolamine, 1 ,2-didocosahexaenoyl-sn-glycero-3-phosphoethanolamine, 1 ,2- dioleoyl-sn-glycero-3-phospho-rac-(l-glycerol) sodium salt (DOPG), and sphingomyelin.

44. The lipid nanoparticle of claim 42, wherein the structural lipid is selected from the group consisting of cholesterol, fecosterol, sitosterol, campesterol, stigmasterol, brassicasterol, ergosterol, tomatidine, tomatine, ursolic acid and alpha-tocopherol.

45. The lipid nanoparticle of claim 42, wherein the PEGylated lipid is selected from the group consisting of PEG-modified phosphatidylethanolamines, PEG-modifiedphosphatidic acids, PEG-modified ceramides, PEG-modified dialkylamines, PEG- modified diacylglycerols, and PEG-modified dialkylglycerols, optionally PEG-c- DOMG, PEG-DMG, PEG-DLPE, PEG-DMPE, PEG-DPPC, and PEG-DSPE.

46. The lipid nanoparticle of claim 42, wherein the lipid component comprises: about 25 mol % to about 60 mol % of a compound of claim 1 ; about 2 mol % to about 25 mol % neutral lipid; about 18.5 mol % to about 60 mol % structural lipid; and about 0.2 mol % to about 10 mol % of PEGylated lipid.

47. The lipid nanoparticle of claim 42, wherein the lipid nanoparticle further comprises a polynucleotide.

48. The lipid nanoparticle of claim 47, wherein the polynucleotide is selected from the group consisting of: a messenger RNA (mRNA), a self-amplifying mRNA (sa- mRNA), a small interfering RNA (siRNA), a microRNA (miRNA), miRNA inhibitors (antagomirs / antimirs), messenger-RNA-interfering complementary RNA (micRNA), short hairpin RNA (shRNA), multivalent RNA, dicer substrate RNA, an antisense oligonucleotide, plasmid DNA, DNA, and complementary DNA (cDNA).

49. The lipid nanoparticle of claim 47, wherein the polynucleotide is a ribonucleic acid (RNA).

50. The lipid nanoparticle of claim 47, wherein the polynucleotide is a conventional or self-amplifying mRNA.

51. The lipid nanoparticle of claim 42, wherein the lipid nanoparticle has a diameter of from about 30 nm to about 160 nm.

52. A pharmaceutical composition comprising a plurality of lipid nanoparticles of claim 42, and a pharmaceutically acceptable carrier.

53. A method of delivering a polynucleotide to a mammalian cell, including administering the lipid nanoparticle of claim 42, or the pharmaceutical composition of claim 52, to a subject to thereby contact the mammalian cell with the lipid nanoparticle or pharmaceutical composition and deliver the polynucleotide to the mammalian cell.

54. The method of claim 53, wherein the mammalian cell is a human cell.

55. A method of producing a polypeptide of interest in a mammalian cell, including the step of contacting the mammalian cell with a lipid nanoparticle of claim 42, or the pharmaceutical composition of claim 52, wherein the lipid nanoparticle comprises a conventional mRNA or a self-amplifying mRNA encoding the polypeptide.

56. A method of treating a disease, disorder, or condition in a subject in need of such treatment, comprising administering a lipid nanoparticle of claim 42, or the pharmaceutical composition of claim 52, to the subject to thereby treat the disease, disorder, or condition.

57. The method of claim 56, wherein the disease, disorder, or condition is selected from the group consisting of a rare disease, an infectious disease, cancer, a proliferative disease, a genetic disease, an autoimmune disease, diabetes, a neurodegenerative disease, a cardiovascular disease, a reno-vascular disease, and a metabolic disease.

58. A vaccine comprising a lipid nanoparticle of claim 42, or the pharmaceutical composition of claim 52, and an mRNA encoding a polypeptide.

59. The vaccine of claim 58, wherein the vaccine is selected from a tumor vaccine and an infectious disease vaccine.

60. The vaccine of claim 59, wherein the infectious disease vaccine is selected from an influenza vaccine, and a coronavirus vaccine, including a SARS-CoV-2 vaccine.

Images