42 results about "Helper epitope" patented technology

The present invention provides for novel immungens that are comprised of an activated polyhydroxypolymer backbone to which is attached 2 separate antigenic determinants. The 1st antigenic determinant includes a B-cell or CTL epitope and the 2nd antigenic determinant includes a T-helper epitope. In preferred embodiments, the antigenic determinants are derived from different molecules and species. Exemplary immunogens of the invention are constituted of a linear tresyl-activated dextran backbone to which is coupled B-cell or CTL epitopes of an antigen and to which is also coupled universal T-helper epitopes. Also disclosed are immunogenic compositions comprising the immunogens, methods of immunisation and a method for identification of suitable immunogens of the invention.

[Problem] To provide a polypeptide which enables stimulation of numerous T cells of different derivation, and to induce strong immunological response against numerous types of cancers.

[Solution] Provided is a fused polypeptide that includes a helper epitope derived from the WT1 protein, and a killer epitope derived from the WT1 protein, wherein the polypeptide includes a total of 3 to 6 of the helper epitopes and the killer epitopes per molecule of the fused polypeptide.

The present invention provides for methods for immunizing actively against autologous carcinoembryonic antigen (CEA). The method encompasses that the immune system is engaged with variant CEA which is either administered as a protein vaccine, or is effected expressed by nucleic acid vaccination or live-viral vaccination. Preferred embodiments include immunization with variants that include at least one foreign T-helper epitope introduced in the CEA sequence. Also disclosed is variant proteins, DNA, vectors, and host cells useful for practising the method of the invention.

Nucleic acid molecules comprising a nucleotide sequence that encodes a chimeric protein are disclosed. The chimeric proteins comprise at least one epitope of a mucosally restricted antigen, at least one CD4+ helper epitope, and, optionally, a secretion sequence. Chimeric proteins that comprise at least one epitope of a mucosally restricted antigen, at least one CD4+helper epitope and, optionally a secretion sequence are also disclosed. Compositions including pharmaceutical compositions and injectables comprising nucleic acid molecule and proteins are disclosed. Methods of treating individuals diagnosed with cancer of a mucosal tissue and methods of preventing cancer of a mucosal tissue are disclosed.

The present invention provides synthetic immunogenic lipopeptide molecules comprising co-linear T-helper and B cell epitopes, and methods for their production and use in the generation of primary and secondary immune responses, and for the vaccination of animal subjects against particular antigens. More particularly, the present invention provides highly soluble lipopeptides wherein the lipid moiety is attached to the terminal side-chain group of an internal lysine or lysine analog, preferably to the terminal side-chain group of an internal diamino acid residue. Preferably the internal lysine or lysine analog is positioned between the T-helper epitope and the B cell epitope or within the T-helper epitope.

The present invention relates to immunotherapeutic methods, and molecules and cells for use in immunotherapeutic methods. In particular, the present invention relates to the immunotherapy of cancer, in particular renal cancer. The present invention furthermore relates to tumour-associated T-helper cell peptide epitopes, alone or in combination with other tumour-associated peptides, that serve as active pharmaceutical ingredients of vaccine compositions which stimulate anti-tumour immune responses. In particular, the present invention relates to 338 novel peptide sequences derived from HLA class II molecules of human tumour cell lines which can be used in vaccine compositions for eliciting anti-tumour immune responses.

The present invention relates to isolated immunogens and their use in the treatment of diseases that are treatable with neutralization of IL-13, such as COPD, asthma and atopic disorders such as hayfever, contact allergies and atopic dermatitis. In particular the invention relates to the neutralization of the biological effects of IL-13 by raising an immune response against the IL-13 by vaccination of a mammal with immunogens comprising the native or mutated amino acid sequence of IL-13, and foreign T-helper epitopes either inserted in, or attached to the IL-13 sequence or present in carrier polypeptides. Also provided by the present invention are DNA vaccines that comprise a polynucleotide sequence that encodes the immunogens of the present invention. The invention further relates to pharmaceutical compositions comprising such immunogens and their use in medicine and to methods for their production.

A peptide-based marker vaccine against Porcine Reproductive and Respiratory Syndrome (PRRS) and a set of immunodiagnostic tests for the prevention, monitoring and control of Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) are disclosed. Vaccine formulations according to various embodiments of the invention contain a mixture of peptides derived from PRRSV GP2, GP3, GP4, or GP5 proteins; each peptide individually contains a B cell PRRSV neutralizing/receptor binding epitope which is individually linked to an artificial T helper epitope for enhancement of the respective peptide's immunogenicity; and which can be supplemented with a mixture of peptides representing the T helper epitopes derived from the PRRSV GP4, GP5, M and Nucleocapsid proteins to provide cell mediated immunity. Such viral peptide compositions are prepared in an acceptable delivery system as vaccine formulations and can provide cross protection of PRRSV antibody free pigs from infection upon PRRSV challenge.

The present invention relates to a synthetic immunogen represented by the general formula 1, useful for generating long lasting protective immunity against various intracellular pathogens which are the causative agents of tuberculosis, leishmaniasis, AIDS, trypanosomiasis, malaria and also allergy, cancer and a process for the preparation thereof. The developed immunogen is able to circumvent HLA restriction in humans and livestock. The invention further relates to a vaccine comprising the said immunogen for generating enduring protective immunity against various diseases. The said vaccine is targeted against intracellular pathogens, more particularly the pathogen M. tuberculosis in this case. In the present invention, promiscuous peptides of M. tuberculosis are conjugated to TLR ligands especially; Pam2Cys to target them mainly to dendritic cells and therefore elicit long-lasting protective immunity. (The formula (I) should be inserted here) General formula (I) wherein, X₁=a promiscuous CD4 T helper epitope selected from SEQ ID No. 1 to 98 OR nil; X₂=a promiscuous CD8 T cytotoxic epitope selected from SEQ ID No. 99 to 103 OR nil; when X1=nil; X2=SEQ ID No. 99 to 103 and when X2=nil; X1=SEQ ID No. 1 to 98; Y=Lysine; and S=Serine.

The present invention provides for novel immungens that are comprised of an activated polyhydroxypolymer backbone to which is attached 2 separate antigenic determinants. The 1st antigenic determinant includes a B-cell or CTL epitope and the 2nd antigenic determinant includes a T-helper epitope. In preferred embodiments, the antigenic determinants are derived from different molecules and species. Exemplary immunogens of the invention are constituted of a linear tresyl-activated dextran backbone to which is coupled B-cell or CTL epitopes of an antigen and to which is also coupled universal T-helper epitopes. Also disclosed are immunogenic compositions comprising the immunogens, methods of immunization and a method for identification of suitable immunogens of the invention.

The present invention provides synthetic immunogenic lipopeptide molecules comprising co-linear T-helper and CTL epitopes, and methods for their production and use in the generation of primary and secondary immune responses, and for the vaccination of animal subjects against particular CTL epitopes. More particularly, the present invention provides highly soluble lipopeptides wherein the lipid moiety is attached to the terminal side-chain group of an internal lysine or lysine analog, preferably to the terminal side-chain group of an internal diamino acid residue. Preferably the internal lysine or lysine analog is positioned between the T-helper epitope and the CTL epitope.

The present invention relates to chimeric peptides having a caveolin-1 binding domain of an HIV-1 gp41 (CBD1) peptide or a variant of said CBD1, fused to a T helper epitope. In one aspect, the T epitope is from a peptide selected from the group consisting of a tetanus toxin, an HIV-1 Gag p24 and an HIV-1 Env-gp120. Compositions containing these chimeric peptides and pharmaceutical and immunogenic compositions as well as vaccines comprising these chimeric peptides also are part of the present invention. Methods to induce neutralizing antibodies against HIV-1 activity and uses of the chimeric peptides to treat or to prevent HIV-1 infection are also disclosed.

Porcine circovirus (PCV2) vaccine compositions comprising a peptide antigen derived from a PCV2 capsid protein are described. In various embodiments, the peptide antigen contains amino acids of the capsid protein from about amino acid 47 to about amino acid 202. In some embodiments, the peptide antigen is optionally linked to an artificial T helper epitope and/or mixed with T helper epitopes derived from the ORF1 and ORF3 proteins of PCV2. Methods of using PCV2 vaccine compositions are also described. In various embodiments, a vaccine composition is used in animals for the prevention of PCV2 infection. In other embodiments, a PCV2 vaccine composition is used as an antigen for diagnosing PCV2 infection.

The present invention relates to novel amino acid sequences of peptides derived from HPV16 that are able to bind to MHC complexes of class II, and elicit an immune response. The present invention further relates to pharmaceutical products, such as vaccines and T-cells, based on said epitopes.

The invention relates to construction and application of a fusion protein vaccine platform. The present invention provides a vaccine, which comprises a fusion protein containing an interferon-target antigen-immunoglobulin Fc region (or antibody) and a Th cell helper epitope. The invention also relates to the use of a fusion protein containing an interferon-target antigen-immunoglobulin Fc (or antibody) region and a Th cell helper epitope for the preparation of a prophylactic or therapeutic composition. The vaccine provided by the invention can be generated through an eukaryotic cell expression system, the vaccine can be inoculated through subcutaneous/muscle or nasal cavity immune ways and the like, and can cause strong immune response of a body. The vaccine of the present invention can be used as a prophylactic or therapeutic vaccine.

The invention relates to a self-assembled DNA tetrahedron and a peptide vaccine delivery system. And the self-assembled DNA tetrahedron is composed of four single-stranded DNAs. The recombinant self-assembled DNA tetrahedron is obtained by recombining a self-assembled DNA tetrahedron. According to the peptide vaccine delivery system, a recombinant self-assembly DNA tetrahedron serves as a main body, and the 5'end or the 3 'end of each single-stranded DNA of the main body is coupled with helper epitope peptide or peptide vaccine.By means of the delivery system, the vaccines can efficiently reside in lymph nodes and are taken and presented by DC cells, so that antigen-specific T cells are effectively activated, and tumor growth is inhibited.

The invention relates to a fusion protein for preventing O-type foot-and-mouth disease virus, and a preparation method and application of the fusion protein. In particular, the present invention relates to a fusion protein, and the fusion protein comprises a molecular adjuvant IL-2 polypeptide, a T cell helper epitope polypeptide, a polypeptide with seven segments of epitopes related to O/Mya98 and O/PanAsia type foot-and-mouth disease virus strain main structural protein VP1, VP2 and VP3, and a killer T cell epitope polypeptide. The invention also relates to the preparation method and application of the fusion protein. The vaccine production preparation process is stable and is suitable for large-scale production. Tests show that the vaccine is safe to use and can effectively prevent infection of different O-type foot-and-mouth disease epidemic strains.