61 results about "T-Cell Epitopes" patented technology

Compositions containing a nucleic acid nanostructure having a desired geometric shape and an antigen and / or immunostimulatory agent(s) bound to its surface are provided. The nanostructure design allows for control of the relative position and / or stoichiometry of the immunostimulatory agent(s) bound to its surface. The antigen and / or immunostimulatory agent(s) displayed on the nanostructure surface are arranged with the preferred number, spacing, and 3D organization to elicit a robust immune response. The displayed antigen can be eOD-GT8. The immunostimulatory agent can be, e.g., T cell epitope such as a pan HLA DR-binding epitope (PADRE) and / or a lectin such as MBL or C3, or ligand thereof such as a glycan including mannose. Also provided are antigen-T cell epitope fusions such as eOD-PADRE and nanostructures presenting the same. The immunostimulatory compositions may thus be useful as immunogens, vaccines, adjuvants, and the like. Methods of inducing immune responses are also provided.

The invention provides a polypeptide for activating cellular immunity in chronic hepatitis B and application of the polypeptide, and belongs to the technical field of biological medicine. A polypeptide library is designed and synthesized on the basis of a preS1 structural domain for coding HBV large HBsAg, a full-length core protein Core, a polymerase protein fragment rich in T cell epitopes and an mRNA-PreS1CPX holoantigen sequence (as shown in SEQ ID NO.1) of full-length X protein HBX, and peptide fragments capable of activating T cell immunity are screened by utilizing ELISPOT and flow cytometry. Experimental results show that the polypeptide sequences as shown in SEQ ID NO.2-15 can promote HBV antigen specific immune response by stimulating CD8 + T lymphocytes to secrete IFN-gamma, so that immune activation treatment of hepatitis B is realized.

The invention provides a tulabacillus Tul4 protein trimer, according to the Tul4 protein trimer, an N-terminal natural Loop region of a monomer of the Tul4 protein trimer is used as flexible connection, Tul4 proteins are connected in series to form the trimer Tul4-trimer, the trimer can retain monomer conformation before fusion and fully expose important T cell epitopes of the monomer, an Ad5-Tul4-trimer vector based on type-5 adenovirus is constructed, and the tulabacillus Tul4 protein trimer can be used for preparing the Tul4 protein trimer. According to the present invention, the Tul4 trimer with the high expression can be obtained in the host cell, the Tul4 trimer can induce the efficient specific humoral immune response under the intramuscular injection and nasal drip immune pathway, the latter can induce the strong mucosal immune response, and the Tul4 trimer can be used for preparing the vaccine for preventing the Tul4 infection or the drug for treating the Tul4 infection.

The invention provides a vaccine composition comprising an influenza virus peptide comprising a CD8+ T cell epitope and an influenza virus peptide comprising a B cell epitope, wherein each peptide is attached to a nanoparticle.

Provided herein are T cell epitopes associated with Type 1 diabetes. Also provided are antigen-presenting cells presenting such epitopes. T cells reactive to such epitopes, and related compositions and therapies.

The invention relates to the technical field of mRNA vaccine research and development, and discloses a Tp0136T cell epitope mRNA vaccine based on lipid nanoparticle delivery and application of the Tp0136T cell epitope mRNA vaccine in syphilis prevention, the vaccine contains an mRNA sequence and an LNP delivery system, the mRNA sequence contains a Tp0136T1T cell epitope coding region (amino acid L477-S486, optimized by codon), a Cap 1 structure, optimized UTR and poly (A) tails of 65-76 adenosine, and psi or m5C is used for replacing trona; the LNP is prepared from SM-102, DSPC (Distearoyl Pyrrolidone), cholesterol and DMG-PEG (Dimethyl Glycol-Polyethylene Glycol) according to a molar ratio of 50 The particle size of the vaccine is less than or equal to 150nm, PDIlt; 0.2, the Zeta potential is-5 to-15 mV, and the encapsulation efficiency is greater than or equal to 93.47%. The preparation method comprises the steps of mRNA design synthesis, mRNA-LNP preparation characterization and in-vitro expression verification, through intramuscular injection inoculation, strong Th1 type and CD8 + CTL immune response can be induced, treponema pallidum load and skin ulcer rate can be reduced, and the method can be used for syphilis prevention.

This disclosure provides a method for treating cancer in human subjects, comprising the administration of a recombinant polypeptide containing a cancer-specific CD8+ T cell epitope. The peptide, recognized by a major histocompatibility complex (MHC) molecule, can activate a T cell immune response to target cancer cells in the subject. This disclosure further provides a cancer-specific CD8+ T cell epitope constrained to an MHC molecule expressed by a specific HLA allele in the subject. This disclosure further provides a composition encoding a recombinant polypeptide capable of inducing an augmented memory CD8+ T cell response.

The application discloses a recombinant FCV antigen and a construction method and application thereof. The construction method of the recombinant FCV antigen comprises the following steps: fusing a T cell epitope coding sequence of a non-structural protein NS7 of FCV and a coding sequence of a SpyTag peptide segment through a coding sequence of a linker, then cloning into a baculovirus transfer vector to obtain a recombinant plasmid, and finally integrating the T cell epitope coding sequence into Bacmid through Tn7 transposition to finally obtain the recombinant FCV antigen. The application selects NS7 as a core immunogen, guides the immune system to produce a high cellular immune response, and thus makes up for the deficiency of an existing vaccine in clearing intracellular viruses; meanwhile, a specific T cell epitope is selected in the sequence of NS7 as an immunogen, which can avoid the immunological escape caused by the variation degree of antigens among different strains and virus antigen drift, and thus provides broader protection.

The present invention provides Claudin-6-specific immunoreceptors (T cell receptors and artificial T cell receptors (chimeric antigen receptors; CARs)) and T cell epitopes which are useful for immunotherapy.

The application discloses a SARS-CoV-2 epitope type vaccine multi-epitope combination and application, and belongs to the technical field of coronavirus vaccine research and development.The first aspect of the application relates to a fusion protein, which comprises in sequence: (a) a SARS-CoV-2 spike protein receptor binding domain or a functional fragment thereof; (b) a T cell epitope domain, comprising: a CTL epitope cluster, the CTL epitope cluster comprising at least one CD8+ T cell epitope polypeptide selected from SEQ ID NO: 1-15; and (c) an immunoglobulin Fc domain.The application adopts a tandem strategy of immunodominant epitopes + conserved epitopes, predicts high-affinity T cell epitopes by computational biology methods, evaluates the HLA restriction in different populations, introduces a flexible linker peptide for optimization design, evaluates the immune effect difference of different combinations through in vitro and animal models, analyzes the synergistic or competitive relationship between epitopes, and optimizes the vaccine design.Through systematic comparison of the immunological effect difference of different epitope combinations and the adaptability to various vaccine platforms, the application establishes an optimized safe, efficient, broad-spectrum and long-acting multi-epitope vaccine design strategy, and has significant application value and important transformation value.

Recombinant adeno-associated virus (AAV) vectors encoding a modified VP1 protein lacking an immunodominant T cell epitope, as well as AAV vector particles containing the modified VP1 protein, are described. Use of the recombinant AAV vectors and vector particles as improved gene therapy vectors with reduced immunogenicity is also described. Isolated VP1 peptides containing an immunodominant T cell epitope, and use thereof, is further described.

The invention belongs to the technical field of biology, and particularly relates to a T cell epitope polypeptide based on ASFV F1055L or P1192R protein, the T cell epitope polypeptide comprises a polypeptide F1055L-1, a polypeptide F1055L-2, a polypeptide F1055L-3 and a polypeptide P1192R-1, and the amino acid sequence is shown as SEQ ID NO.1-4. The polypeptide is obtained through screening and has the characteristics of inducing ASFV specific T cells and assisting in controlling ASFV infection and virus clearance. In-vitro experiments prove that the epitope polypeptide has the capability of inducing ASFV specific T cell response, and a theoretical basis is provided for subsequent development of polypeptide vaccines and diagnostic preparations based on ASFV protein source epitopes.

The invention belongs to the technical field of immunotherapy of allergic diseases, and provides a method for identifying dominant B cell epitopes and T cell epitopes in wheat omega-5 prolamin. According to the identification method provided by the invention, an immunoinformatics tool, a proliferation test, a degranulation test and the like are comprehensively applied, and the cell proliferation capacity, cell factor release, IgG / IgE binding capacity and degranulation capacity of T / B cell epitopes are evaluated. Results show that the T cell epitopes T1 and T2 sharing the same sequence are relatively strong in multiplication capacity, can up-regulate Th2 related cell factors, but do not have degranulation activity. Three B cell peptide fragments B3, B4 and B9 which share a common motif region QQXPQQQ (X = F, L) can promote IgG / IgE binding and degranulation capabilities. These findings would contribute to the development of epitope-based immunotherapies against wheat allergy individuals.

The application belongs to the field of biology, and discloses a method for high-throughput screening of viral CTL epitopes based on immunopeptidomics, which comprises the following steps: transfecting mammalian cells with eukaryotic expression plasmids having MHC I molecules in series with the alpha chain and the beta2m chain to establish a mammalian cell line expressing animal MHC I molecules; using a virus to infect the mammalian cell line expressing MHC I molecules to prepare MHC I-peptide complexes; and obtaining antigen peptides existing in the MHC I-peptide complexes. The method takes chicken MHC I allele BF2*1901 molecules as the research object, takes H9N2 subtype avian influenza virus as the model virus, comprehensively characterizes chicken MHC I restricted H9N2 antigen peptide groups, and identifies immunodominant CTL epitope immunity, and is suitable for CTL epitope screening of different chicken MHC I molecules and different subtypes of avian influenza viruses, provides a fast, efficient and economical technical means for studying the specific binding of chicken MHC I molecules and antigen peptides, provides a favorable reference for T cell epitope screening of major animal pathogens, and provides a scientific basis for poultry disease-resistant breeding, development of new vaccines and immune evaluation strategies. Meanwhile, the application also discloses restricted epitope peptides, nucleic acid molecules and applications.

The application discloses O-type foot-and-mouth disease virus polyepitope biomimetic nano self-assembly virus-like particles and a preparation method and application thereof. The O-type foot-and-mouth disease virus polyepitope biomimetic nano self-assembly virus-like particles are obtained by self-assembly of a recombinant protein SPC-B4T and 2STAP205 in vitro; wherein the recombinant protein SPC-B4T is obtained by sequentially connecting SpyCatcher, antigen epitopes of four topological representative strains of O-type and T cell epitopes of 3A in sequence; and the recombinant protein 2STAP205 is obtained by connecting genes of SpyTag to both ends of a phage AP205 gene through flexible spacers respectively. In addition, the application also prepares the virus-like particles into vaccines, and it is found that the prepared vaccines have good immunization efficacy, are a new type of vaccine with wide prospects, can provide material reserves and technical support for O-type foot-and-mouth disease prevention and control in China, and can generate great economic benefits and important social benefits.

The invention belongs to the technical field of biology, and discloses a recombinant turkey herpesvirus, and a tandem epitope expression cassette is inserted between UL45 and UL46 of the recombinant turkey herpesvirus; the tandem epitope expression cassette is used for expressing a plurality of B cell epitopes and a plurality of T cell epitopes. According to the recombinant herpesvirus of turkeys, a tandem epitope is inserted into an HVT (herpesvirus of turkeys) vector, and experiments prove that the recombinant herpesvirus of turkeys can induce higher HI antibody and neutralizing antibody titer, obviously stimulate spleen T lymphocyte response of immunized chicken, and can generate an obvious challenge protection effect in 3 days; the challenge protection effect is obviously superior to that of a combined immunization scheme of H9N2 AIV multi-epitope recombinant baculovirus (BV-BNT) and InV provided by the applicant; meanwhile, the recombinant turkey herpesvirus is verified to be capable of performing intraembryonic vaccination and generating an obvious immune protection effect. Meanwhile, the invention further provides a preparation method and application of the recombinant turkey herpesvirus.

This invention provides a tumor peptide vaccine for treating breast cancer and a method for preparing the same, wherein the tumor peptide vaccine comprises: a peptide mixture containing 8 CD8+ molecules. + T cell epitopes peptide fragments and 3 CD4+ + polypeptide fragments of T cell epitopes; the eight CD8... + The amino acid sequences of the polypeptide fragments of T cell epitopes are shown in SEQ ID NO: 1-8, and the three CD4 lines... + The amino acid sequences of the polypeptide fragments of T cell epitopes are shown in SEQ ID NO: 9-11; all of the polypeptide fragments are synthesized from mutant polypeptide sequences of the tumor-associated gene SWAP70; the present invention has the beneficial effect of effectively promoting the generation of T cell responses in the body and is applicable to the field of tumor immunology.

The invention discloses a recombinant FCV antigen and a construction method and application thereof. The construction method of the recombinant FCV antigen comprises the following steps: fusing a T cell epitope coding sequence derived from a non-structural protein NS7 of FCV with a coding sequence of a SpyTag peptide fragment through a coding sequence of a linker, and cloning to a baculovirus transfer vector to obtain a recombinant plasmid; and finally, integrating the T cell epitope coding sequence into Bacmid through Tn7 transposition to finally obtain the recombinant FCV antigen. According to the invention, NS7 is selected as a core immunogen to guide an immune system to generate high cellular immune response, so that the defect of an existing vaccine in removing viruses in cells is overcome; meanwhile, T cell epitopes with specificity are selected from the sequence of NS7 as immunogens, so that the variability of antigens among different strains and immune escape caused by virus antigen drift can be avoided, and wider-spectrum protection is provided.

The application discloses a recombinant virus-like nanoparticle for immunotherapy of gastric cancer and application thereof. The recombinant virus-like nanoparticle is a chimeric recombinant virus-like nanoparticle formed by self-assembly of a fusion protein HBC-CLDN18.2 of a hepatitis B virus core protein and CLDN18.2 tight junction protein. The application uses genetic engineering technology to truncate the C-terminal end of a natural hepatitis B virus core antigen, and mutate cysteine residues at positions 48 and 107 into serine, so that the hepatitis B virus core antigen can self-assemble into a virus-like nanoparticle with strong stability. The virus-like nanoparticle is used as a carrier, a B cell epitope peptide (tight junction protein CLDN18.2) of a gastric cancer tumor-related antigen is inserted into an immunodominant site of the carrier, so that the humoral immune response against gastric cancer is enhanced. Two T cell epitope peptides of the heterologous hepatitis B virus core antigen are used to replace T cell epitope peptides on the carrier, so that the cellular immune response against gastric cancer is enhanced, and strong antitumor effect and immune memory effect are shown.

Compositions and methods disclosed herein can comprise a cell (e.g., gamma delta T cell) engineered to comprise a nucleic acid molecule that encodes an immunizing polypeptide, and the engineered cell can present one or more T cell epitopes from the immunizing polypeptide via HLA, thereby inducing activation of endogenous T cells in a subject (e.g., host or recipient of the engineered cell). The cells can further express a CAR, facilitating induction of (1) a direct immune response mediated by the CAR, and (2) induction of immune responses (e.g., anti-cancer) mediated by the subject's endogenous T cells, for example, against different target antigens or T cell epitopes than those targeted by the CAR. Such a cell can be described as a Dual-action Antigen-presenting CAR γδ T-cell (DACART). DACART can combine the strengths of CAR T-cell therapy with those of cancer vaccination.

The present invention relates to a fusion protein comprising a peptide antigen containing a T cell epitope, a first carrier protein linked to the N-terminus of the peptide antigen, and a second carrier protein linked to the C-terminus of the peptide antigen; a nucleic acid molecule encoding the fusion protein; an expression vector containing the nucleic acid molecule; a cell transformed with the expression vector; and an immunogenic composition comprising the fusion protein, the nucleic acid molecule, the expression vector, or the cell.

Disclosed herein are methods for treating cancer in a human subject comprising administering a recombinant polypeptide comprising a cancer-specific CD8 + T cell epitope. Peptides recognized by major histocompatibility complex (MHC) molecules can activate a T-cell immune response to a target cancer cell in a subject. The present disclosure also provides cancer-specific CD8 + T cell epitopes restricted to MHC molecules expressed by a specific HLA-allele in a subject. The present disclosure also provides compositions encoding recombinant polypeptides that are capable of eliciting swollen memory CD8 + T cell responses.

The present invention includes compositions, including epitope megapools, and methods for detecting the presence of: an influenza or an immune response relevant to an influenza infection including T cells responsive to one or more Influenza peptides or proteins comprising, consisting of, or consisting essentially of: one or more amino acid sequences selected from any sequence set forth in SEQ ID NOS: 1 to 929 or Tables 1 to 5, or a subsequence, portion, homologue, variant or derivative thereof; a fusion protein; a pool of 2 or more peptides; or a polynucleotide that encodes one or more peptides or proteins, comprising, consisting of, or consisting essentially of an amino acid sequence selected from any sequence set forth in SEQ ID NOS: 1 to 929 or Tables 1 to 5, or a subsequence, portion, homologue, variant or derivative thereof, vaccines, diagnostics, therapies, and kits, comprising such proteins or peptides.

Systems and methods for identifying cellular responses to candidate agents, including a processing cycle, are described. The systems and methods utilize fast reaction readout values in conjunction with mild removal and / or exchange of analyte fluids. For example, the systems and methods may be used in T cell epitope mapping, T cell diagnosis, and other cell-based high throughput screening methods.

The application discloses a kind of for preventing Bungowenia virus Polyepitope fusion protein, gene, vaccine and preparation method thereof, belong to biological medicine technical field.The Polyepitope fusion protein for preventing Bungowenia virus provided in the application is obtained in series by E. coli outer membrane anchoring protein ClyA, four MHC I class restricted T cell epitopes, four MHC II class restricted T cell epitopes, two B cell epitopes and BALB / c mouse immunoglobulin Fc fragment.The vaccine of the application is prepared by high-pressure homogenization process to obtain the engineered artificial nanovesicle (E-aBNV) with high-density surface display antigen array.The E-aBNV utilizes itself pathogen-associated molecular pattern to provide "self-adjuvant" effect, can efficiently activate B cell receptor and promote antigen cross-presentation, thereby synergistically inducing high level of neutralizing antibody and Th1-biased cellular immunity, which can effectively block the infection of Bungowenia virus to host cell.

This paper describes a composition and a method for using the same.The composition described herein can comprise a single-chain trimeric nucleic acid encoding a first T cell epitope, β2 microglobulin, and an MHC class I heavy chain sequence.The method described herein can be used to activate and / or expand antigen-presenting cells.The method described herein can also be used to treat or prevent viral infection, bacterial infection, parasitic infection, and / or cancer in subjects.

The present invention provides a modified protein of influenza A matrix 1 (M1), the modified protein inducing a humoral immune reaction and a cellular immune reaction against influenza A virus. The modified protein has the following characteristics: (a) at least one region of the M1 protein is substituted by a membrane fusion peptide derived from influenza A virus hemagglutinin; and (b) at least one T cell epitope in the M1 protein is preserved.

The present invention includes compositions, including epitope megapools, and methods for detecting the presence of: an Alphavirus or an immune response relevant to an Alphavirus infection including T cells responsive to one or more Alphavirus peptides or proteins comprising, consisting of, or consisting essentially of: one or more amino acid sequences selected from any sequence set forth in Table 1 (SEQ ID NOS: 1 to 150), or a subsequence, portion, homologue, variant or derivative thereof; a fusion protein; a pool of 2 or more peptides; a polynucleotide that encodes one or more peptides or proteins. The invention further provides vaccines, diagnostics, therapies, and kits, comprising such proteins or peptides.

The present application relates to nanoparticles comprising (a) an amphiphilic polymer; (b) a first lipid comprising a polar head group and a non-polar tail group; and (c) a peptide comprising a T cell epitope. Also disclosed are populations of said nanoparticles, processes for manufacturing said nanoparticles, precursors for manufacturing said nanoparticles, pharmaceutical compositions of said nanoparticles, and methods of treating a disease or disorder comprising administering said nanoparticles to a subject.

The invention provides a design method for improving the population coverage rate of a multi-epitope vaccine, which comprises the following steps: carrying out epitope prediction on B cells and T cells according to candidate proteins to obtain B cell epitopes and T cell epitopes; setting a sliding window for the candidate antigen protein; judging whether the needed epitope exists in the sliding window or not; if the needed epitope exists, shortening the length of the window by one amino acid, and judging whether the specifically bound MHC-I / II allele is reduced or not; if the MHC-1 / II allele is reduced, the window shortening operation is revoked, and overlapping epitopes which are specifically combined with the maximum MHC-1 / II allele are reserved, so that candidate overlapping epitopes are obtained. According to the invention, a three-type epitope maximization strategy based on a sliding window is adopted, and population coverage rate maximization and dual immune recognition are realized in a vaccine construct with a compact structure by recognizing the number of specific binding MHC-I / II alleles and the number of partially overlapped B cell epitope amino acids.