251 results about "Phosphatidylethanolamine" patented technology

The invention provides novel methods for treating disease based upon the medicinal use of lipids and phospholipids covalently bound to physiologically acceptable monomers or polymers. Phosphatidylethanolamine moieties conjugated to physiologically acceptable monomers and polymers (PE conjugates) manifest an unexpectedly wide range of pharmacological effects, including stabilizing cell membranes; limiting oxidative damage to cell and blood components; limiting cell proliferation, cell extravasation and (tumor) cell migratory behavior; suppressing immune responses; and attenuating physiological reactions to stress, as expressed in elevated chemokine levels. The surprisingly manifold pharmacological properties of the PL-conjugates allow for the invention, disclosed herein, of novel methods for the treatment of a diverse range of disease states, including obstructive respiratory disease, including asthma; colitis and Crohn's disease; central nervous system insult, including blood brain barrier compromise, ischemic stroke, and multiple sclerosis; contact dermatitis; psoriasis; cardiovascular disease, including ischemic conditions and prophylaxis for invasive vascular procedures; cellular proliferative disorders, including anti-tumor vasculogenesis, invasiveness, and metastases; anti-oxidant therapy; hemolytic syndromes; sepsis; acute respiratory distress syndrome; tissue transplant rejection syndromes; autoimmune disease; viral infection; and hypersensitivity conjunctivitis. The therapeutic methods of the invention include administration of phosphatidylethanolamine bound to carboxymethylcellulose, heparin, hyaluronic acid, polyethylene glycol, and Polygeline (haemaccel). Disclosed herein are also new compounds comprised of phospholipid moieties bound to low molecular weight monomers and dimers, including mono- and disaccharides, carboxylated disaccharides, mono- and dicarboxylic acids, salicylates, bile acids, and fatty acids.

Particles having a tap density less than about 0.4 g / cm3 are formed by spray drying from a colloidal solution including a carboxylic acid or salt thereof, a phospholipid, a divalent salt and a solvent such as an aqueous-organic solvent. The colloidal solution can also include a therapeutic, prophylactic or diagnostic agent. Preferred carboxylic acids include at least two carboxyl groups. Preferred phospholipids include phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phophstidylserines, phosphatidylinositols and combinations thereof. The particles are suitable for pulmonary delivery.

The present disclosure relates to nutritional compositions comprising a neurologic component, wherein, the neurologic component may promote brain and nervous system development and further provide neurological protection and repair. The neurologic component may include phosphatidylethanolamine, sphingomyelin, cytidine diphosphate-choline, ceramide, uridine, at least one ganglioside, and mixtures thereof. The disclosure further relates to methods of promoting brain and nervous system health by providing said nutritional compositions to target subjects, which includes pediatric subjects.

The invention relates to a nanoparticle and a preparation method thereof. Poly(lactide-glycolide acid) (PLGA) is in the center to serve as a core, phospholipid surrounds the surface of the PLGA core in monolayer and distearoyl phosphatidylethanolamine-polyethyleneglycol-carboxyl (DSPE-PEG-COOH) penetrates the monolayer phospholipid to serve as the shell. The phospholipid, the DSPE-PEG-COOH and the PLGA have good biocompatibility, can entrap hydrophobic drugs and control the drugs to release slowly in the human bodies. The phospholipid surrounds the surface of the PLGA, thus ensuring that the particle can avoid immune system recognition so that the circulating half life of the particle is lengthened. The PEG shell ensures the particle to have spatial stability, static stability, long circulation and other characteristics and to be not easily agglomerated. Meanwhile, carboxyl is easily crosslinked with such ligands as antibodies, peptide, probes and the like, thus ensuring the particle to have targeting characteristic. The preparation method of the nanoparticle is simple, convenient practical and is easy to operate and popularize.

The invention relates to conjugates comprising all or part of the amino acid sequences of at least one peptide derived from an extracellular loop of the P-170 protein. The peptide may be covalently attached to spacers which may be polyethyleneglycol (PEG), polyglycine, polylysine or any polymer chain suitable for human use and is coupled at its free end to a phospholipids, e.g., phosphatidylethanolamine or any other chemically suitable phospholipid.

Mixtures of natural phosphatidylcholine species, natural lysophosphatidylcholine species, phosphatidylserine species, phosphatidylethanolamine species, 1-hydroxy-2-acyl-phosphatidylcholine species, 1-hydroxy-2-acyl-phosphatidylserine molecular species, 1-hydroxy-2-acyl-phosphatidylethanolamine molecular species, 1-O-alkyl-2-hydroxy phosphatidylcholine species, 1-O-alkyl-2-docosaheaxnoyl phosphatidylcholine species 1-O-alkyl-2-docosahexaenoyl phosphatidylserine species, and 1-O-alkyl-2-docosahexaenoyl phosphatidylethanolamine species, Methods using the above disclosed mixtures in mammals to treat various conditions.

The invention discloses a reductively-responsive paclitaxel prodrug. The reductively-responsive paclitaxel prodrug is synthesized from paclitaxel (PTX) and dithiodicarboxylic acid in a mol ratio of 2: 1 through covalent combination via an ester bond, and the molecular structure of the synthesized paclitaxel prodrug is PTX-SS-PTX. A PTX prodrug nano-micelle carrier is mainly composed of PTX-SS-PTX and distearoyl-phosphatidylethanolamine-polyethylene glycol (DSPE-PEG). According to the PTX-SS-PTX prodrug in the invention, a disulfide bond can rotate freely; and on the condition that the paclitaxel prodrug and a paclitaxel prodrug nano-micelle drug delivery system provided by the invent are stimulated by a high-concentration glutathione reductive environment in tumor cells, the disulfide bond breaks, and a parent drug is released. The reductively-responsive paclitaxel prodrug can obviously improve the drug loading capacity and encapsulation efficiency of PTX and improves stability of a PTX nanometer drug delivery system.

Disclosed herein are polar lipid mixtures, comprising glycerophospholipids such as phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylserine (PS) and phosphatidyl-inositol (PI), and sphingolipids such as sphyngomyelin (SM). Most importantly, the ratio of phospholipids in said mixture is comparable to that of HMF, and is represented by SM>PC>PE>PS>PI or SM=PC>PE>PS>PI. Processes for the preparation of said mixtures and uses thereof are also described herein.

A lipid preparation including a glycerophospholipid or salt, conjugate and derivatives thereof, particularly phosphatidylserine (PS), phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidyl-inositol (PI), phosphatidylglycerol (PG) and phosphatidic acid (PA), and poly-unsaturated fatty acid (PUFA) acyl groups, particularly long-chain poly-unsaturated fatty acid (LC-PUFA) acyl groups such as omega-3 and / or omega-6 acyl groups, wherein said PUFA is covalently bound to said glycerophospholipid. The preparation possesses an improved bioactivity, and is useful in the treatment of various cognitive and mental conditions and disorders and for maintenance of normal functions of brain-related systems and processes.

This invention pertains to pharmaceutical formulations which comprise (i) a drug (e.g., an amphiphilic drug) (e.g., an anthracycline) (e.g., doxorubicin) and (ii) a short-chain sphingolipid (e.g., a short-chain glycosphingolipid or a short-chain sphingomyelin) (e.g., N-octanoyl-glucosylceramide, referred to as C8-GlcCer) (e.g., N-hexanoyl-sphingomyelin, referred to herein as C6-SM), and which provide improved drug delivery and efficacy. The short-chain sphingolipidis selected from compounds of the following formula: wherein: R1 is independently: an O-linked saccharide group; or an O-linked polyhydric alcohol group; or: R1 is independently: an O-linked (optionally N-(C1-4alkyl)-substituted amino)-C1-6alkyl-phosphate group; or an O-linked (polyhydric alcohol-substituted)-C1-6alkyl-phosphate group; R2 is independently C3-9alkyl, and is independently unsubstituted or substituted; R3 is independently C7-19alkyl, and is independently unsubstituted or substituted; R4 is independently —H, —OH, or —O—C1-4alkyl; RN is independently —H or C1-4alkyl; the bond marked with an alpha (α) is independently a single bond or a double bond; if the bond marked with an alpha (α) is a double bond, then R5 is —H; if the bond marked with an alpha (α) is a single bond, then R5 is —H or —OH; the carbon atom marked (*) is independently in an R-configuration or an S-configuration; the carbon atom marked (**) is independently in an R-configuration or an S-configuration; and pharmaceutically acceptable salts, solvates, esters, ethers, chemically protected forms thereof. In one embodiment, the pharmaceutical formulation is a liposomal pharmaceutical formulation prepared using a mixture of lipids comprising, at least, vesicle-forming lipids (e.g., phospholipids) (e.g., phosphatidylcholines) (e.g., fully hydrogenated soy phosphatidylcholine (HSPC)) (e.g., dipalmitoyl-phosphatidylcholine (DPPC)) and said short-chain sphingolipid, and optionally cholesterol and optionally a vesicle-forming lipid which is derivatized with a polymer chain (e.g., a phosphatidylethanolamine (PE) which is derivatized with polyethyleneglycol (PEG)) (e.g., N-(carbonyl-methoxypolyethylene glycol 2000)-1,2-distearoyl-sn-glycero-3-phosphoethanolamine sodium salt (MPEG2000-DSPE). The present invention also pertains to methods for the preparation and use of such formulations.

The present invention relates to a preparation suitable for the prevention and / or treatment of vascular disorders, comprising the following fractions:fraction a) consisting of long chain polyunsaturated fatty acids;fraction b) consisting of phospholipids, which fraction contains at least two different phospholipids selected from the group consisting of phosphatidylserine, phosphatidylinositol, phosphatidylcholine and phosphatidylethanolamine.fraction c) consisting of compounds which are a factor in methionine metabolism, which fraction contains at least one member selected from the group consisting of folic acid, vitamin B12, vitamin B6, magnesium and zinc.

The invention provides a lipid-mixed poly (lactic-co-glycolic acid) (PLGA) nanoparticle having a high drug loading amount and an active targeting effect. The nanoparticle is of a core-shell structure, wherein the core is a poly (lactic-co-glycolic acid) (PLGA), and distearoyl-phosphatidylethanolamine-polyethylene glycol-folic acid and cholesterol-arginine-histidine methyl ester are embedded in the surface of the core. The nanoparticle disclosed by the invention can be used for remarkably improving the drug loading amount and the encapsulation efficiency of adriamycin, enhancing the cytotoxicity of the adriamycin to tumor cells and presenting a certain anti-multidrug resistance activity; the nanoparticles loaded with the adriamycin are mainly concentrated in tumor tissues after entering a body, so that the anti-tumor effect of the adriamycin is improved, and toxic and side effects are remarkably reduced; and a new strategy for the development of antitumor pharmaceutical preparations is provided.

PCT No. PCT / EP92 / 00089 Sec. 371 Date Nov. 2, 1992 Sec. 102(e) Date Nov. 2, 1992 PCT Filed Jan. 17, 1992 PCT Pub. No. WO92 / 13525 PCT Pub. Date Aug. 20, 1992The phospholipid bilayer contains at least one pharmaceutically active drug and comprises cell-specific markers on the membrane which have at least 90% biological activity when measured according to Luescher & Glueck, Antiviral Research 14, 39-50. In the membrane, the cholesterol content is preferably less than 2% by weight, the detergent content preferably less than 1 ppb. The vesicle diameter preferably is about 80 nm. the phospholipid in the membrane may comprise 70 to 95% by weight of phosphatidylcholine and preferably 10 to 20% by weight of phosphatidylethanolamine; preferably 6-8% by weight of a crosslinker, preferably of a sulfosuccinimidyl derivate, and at least one cell-specific fusion peptide are linked to the membrane. The vesicles are used for the preparation of pharmaceuticals against AIDS and carcinomas.

The invention relates to a ginkgolide B nanoliposomes drug and a method for preparing the same. The invention provides the ginkgolide B nanoliposomes drug including the following materials and the following radios: 8-12 mol compositions of cephalin and distearoyl choline with mole ratio of 1:3-6; 6-8 mol compositions of sojasterol and cholesterin with mole ratio of 1:2-4; 4-6 mol compositions of gamma-cyclodextrin / 2-hychoxypropyl-beta-cyclodextrin and alpha-cyclodextrin with mole ratio of 3:1; 0.2-0.4 mol methoxy polyethylene glycol 2000-hydrogenated soybean phosphatidylethanolamine; 2 mol ginkgolide B; and 0.1-0.5 mol vitamine E. A method for preparing the ginkgolide B nanoliposomes drug is also provided in the invention to produce the ginkgolide B nanoliposomes for target treating blocking of vessel or endothelial cell thereof, with a better healing effect than ordinary preparations of ginkgolide B.

A freeze-dried powder of honokiol liposome for preparing the medicines to treat lung cancer and mammary cancer is proportionally prepared from honokiol, polyethanediol-phosphatidylethanolamine, lecithin and cholesterol. It has high synergistic and sensitizing action when it is applied in conjunction with chemicotherapeutic medicine.

The present invention provides gold nanocluster-liposome composite nanoparticles, which are a gold nanocluster encapsulated with a liposome vesicle, wherein the surface of the liposome vesicle is modified with distearoyl phosphatidylethanolamine-polyethylene glycol, the surface of the gold particle in the gold nanocluster is modified with a penetrating peptide and is bound to Cas9 protein and guiding ribonucleic acid, and the liposome vesicle comprises dioleoyl phosphoethanolamine, 2,3-dioleyloxypropyltrimethyl ammonium chloride and cholesterol. The invention further provides a preparation method and applications of the gold nanocluster-liposome composite nanoparticles. According to the present invention, by using the gold nanocluster-liposome composite nanoparticles, the CRISPR / Cas9 system can be efficiently delivered into cells without any other transfection reagents so as to improve the cell intake rate and the transfection efficiency, such that the gene treatment effects on a variety of tumors can be achieved, and the tracing effect can be achieved.

The invention refers to a lipid carrier composition for controlled release of a bioactive substance, which comprises at least one triglyceride oil, and at least one polar lipid selected from the group consisting of phosphatidylethanolamine and monohexosylceramide, and ethanol, which is characterised in that the carrier composition has the ability to form a cohesive structure, which structure is retained in an aqueous environment. The invention also refers to a pharmaceutical composition consisting of said lipid carrier and a bioactive substance dissolved or dispersed in the carrier, preferably an injectable composition.

The invention relates to a nano-drug simulating superoxide dismutase or catalase and a preparation method and application thereof. A nano-carrier is prepared from cyclodextrin derivatives with the hydrogen peroxide removing capacity, free radical scavenger drugs, lecithin and polyethylene glycol-distearoyl-phosphatidylethanolamine, wherein the mass ratio of the polyethylene glycol-distearoyl-phosphatidylethanolamine to the cyclodextrin derivatives is 2:100-1:1. The nano-drug prepared through the method is in a spherical shape, the particle size range is about 20-800 nm, and the free radical scavenger drugs are evenly distributed in the nano-drug. The preparation method comprises the steps that firstly, the lecithin and the polyethylene glycol-distearoyl-phosphatidylethanolamine are dissolved in water to obtain a water phase, and the cyclodextrin derivatives and the free radical scavenger drugs are dissolved in organic solvent to obtain an organic phase; secondly, the organic phase is slowly and dropwise added in the preheated water phase, centrifugal washing is performed, freeze drying is performed, and then the nano-drug is obtained. The nano-drug has the obvious preventing and treating effects on oxidative stress injury correlation diseases such as inflammatory bowel diseases, myocardial infarction and congestive heart failure.

The present invention provides a method for extracting a lipid mixture having a high percentage of phospholipids comprising polyunsaturated fatty acids. The method comprises the steps of (a) heating the viscera of fish with hot water or steam; and (b) extracting from the heated viscera of fish, using a solvent, the lipid mixture containing phospholipids comprising polyunsaturated fatty acids. The lipid mixture obtained by the present method contains phosphatidylserine comprising docosahexaenoic acid and phosphatidylethanolamine comprising docosahexaenoic acid in high concentration.

The present invention relates to a bilayer lipids membrane surface modified protein chip, a silicon substrate being a solid substrate on which being, in turn, a L-alpha-phosphatidylethanolamine monomolecular layer linked to the silicon substrate through covalent bonds and a p-nitrophenyl ester-polyethylene glycol-(1,2-dioleoyl-3-glycerophosphatide ethanolamine) layer associated with the phosphatidylethanolamine monomolecular layer by a hydrophobic effect. The protein chip is obtained by fixing the L-alpha-phosphatidylethanolamine monomolecular layer at the surface of the silicon substrate through covalent bonds in a micro- runner system and then adsorbing the p-nitrophenyl ester-polyethylene glycol-(1,2-dioleoyl-3-glycerophosphatide ethanolamine) layer. Said protein chip is capable of applied in an imaging ellipsometry biosensor to explore target molecules capable of associating specifically therewith by covalently fixing ligands molecules at terminal tetrafunctional radicals of the protein chip surface PEG, wherein the surface morphology changes of the protein chip are capable of being observed in said imaging ellipsometry system, after both are associated. The bilayer lipids membrane surface modified protein chip in accordance with the present invention is capable of avoiding effectively a nonspecific adsorption, with its ligands molecules having excellent stability and being kept high biological activities.

The invention relates to a macrocyclic polyamine [12]aneN3 compound based on TPA-BI, and a preparation method and an application thereof. The compound disclosed by the invention is mainly prepared andsynthesized by means of Suzuki coupling, esterification reaction and Click reaction. The compound provided by the invention has the advantages of great Stock displacement and two-photon fluorescenceproperty as well as long wave excitation, low self-Illumination and high 3D resolution. The compound has an aggregation-inductive effect (AIE). The compound provided by the invention can form a pH stimulation responding cationic liposome with dioleoyl phosphatidylethanolamine (DOPE) to promote release of DNA in cells. The cationic liposome can enter cell nucleus efficiently so as to improve the transfection efficiency of the cells.

Disclosed are the surprising discoveries that aminophospholipids, such as phosphatidylserine and phosphatidylethanolamine, are stable and specific markers accessible on the luminal surface of tumor blood vessels, and that the administration of an anti-aminophospholipid antibody alone is sufficient to induce thrombosis, tumor necrosis and tumor regression in vivo. This invention therefore provides anti-aminophospholipid antibody-based methods and compositions for use in the specific destruction of tumor blood vessels and in the treatment of solid tumors. Although various antibody conjugates and combinations are thus provided, the use of naked, or unconjugated, anti-phosphatidylserine antibodies is a particularly important aspect of the invention, due to simplicity and effectiveness of the approach.

Provided is a taste improver that improves or decreases unpleasant bitterness, astringent taste, harsh taste, bitter taste, or the like that results from potassium salts, magnesium salts, calcium salts, and ammonium salts without adversely affecting savoriness of a food or drink. The taste improver includes a vegetable extract and / or a phospholipid. In the taste improver, the aforementioned vegetable extract includes a vegetable-derived glycoside and / or glycoside aglycone. In the taste improver, the aforementioned phospholipid is phosphatidylcholine, phosphatidylserine, phosphatidylethanolamine, phosphatidylinositol, and / or a lyso form thereof. Arginine is further added to the aforementioned taste improver. Trehalose and / or hydrogenated starch syrup are further added to the taste improver. A manufacturing method of such and an improvement method for the unpleasant bitterness, astringent taste, harsh taste, bitter taste, or the like caused by potassium salts, magnesium salts, calcium salts, and ammonium salts using these taste improvers. A food or drink including these taste improvers.

The invention provides cabazitaxel long-circulation liposome injection and a preparation method thereof. The cabazitaxel long-circulation liposome injection comprises cabazitaxel or a pharmaceutically acceptable salt thereof, tocopherol polyethylene glycol succinate, distearoyl-phosphatidylethanolamine-polyethylene glycol-maleimide and phospholipid. The cabazitaxel long-circulation liposome injection is prepared by a film method. The liposome not only has the advantages of reduced toxicity, simple and convenient clinical use and improved bioavailability, but also has good stability of storage and use.

The invention relates to a fluorocarbon nanodrug delivery system, which comprises a superparamagnetic full fluorocarbon core and a drug delivery lipid layer, wherein the lipid layer is coated with a glucocorticoid anti-inflammatory agent, a magnetic resonance contrast agent and phosphatidylethanolamine which is connected with biotins; full fluorocarbon accounts for 26 to 32 weight percent of the nanodrug delivery system; the lipid layer accounts for 6.8 to 7.2 weight percent of the nanodrug delivery system; the balance is water; the glucocorticoid anti-inflammatory agent in the lipid layer accounts for 1.5 to 3 weight percent; the magnetic resonance contrast agent in the lipid layer accounts for 62 to 68 weight percent; the phosphatidylethanolamine which is connected with the biotins accounts for 0.5 to 1 weight percent in the lipid layer; and the balance is lipid material. Nano particles are connected with special antibodies through a biotin-avidin system and combined with antibody epi positions of target cells; the nano surface lipid layer and cell surfaces are subjected to lipid exchange to achieve the aim of slow release of medicines; the full fluorocarbon core can strengthen the strength of magnetic resonance detection signals of a paramagnetic contrast agent on the vector surface; and the fluorocarbon nanodrug delivery system can perform early diagnosis on diseases through a pathological mechanism of the diseases positioned and displayed by target molecules.

The invention provides a polyethylene glycol-modified phospholipid derivative taking a 4-substituted anilino-quinazoline group as a targeting ligand and a preparation method thereof. The method comprises the following steps of: performing condensation with para-methylbenzene sulfonyl chloride, substitution with phthalimide potassium salt and hydrolysis with a hydrazine hydrate by taking polyethylene glycol (PEG) as a starting raw material to obtain diamine PEG; and reacting with targeting ligands, i.e., N-(3-chlorin-4-fluorin)-6-(3-chloropropyl)-7-methoxylquinazoline-4-amine and distearoylphosphatidylethanolamine (DSPE) to respectively obtain 4-anilino-quinazoline group-PEG-DSPE. A liposome preparation of the 4-anilino-quinazoline group-PEG-DSPE can be used for realizing target administration of tumor cells and reducing the toxic and side effects of a tumor medicament; and the pharmacodynamic structure of gefitinib can give play to dual medicament effects together with other liposome-coated antitumor medicaments, so that the tumor treatment effect is enhanced greatly.

Disclosed is a lipid preparation comprising a glycerophospholipid or salt, conjugate and derivatives thereof, particularly phosphatidylserine (PS), phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidyl-inositol (PI), phosphatidylglycerol (PG) and phosphatidic acid (PA), and poly-unsaturated fatty acid (PUFA) acyl groups, particularly long-chain poly-unsaturated fatty acid (LC-PUFA) acyl groups such as omega-3 and / or omega-6 acyl groups, wherein said PUFA is covalently bound to said glycerophospholipid. The disclosed preparations possess an improved bioactivity, and are useful in the treatment of various cognitive and mental conditions and disorders and for maintenance of normal functions of brain-related systems and processes, for example ADHD.