Striking Antiviral Potential Allows Induction of CD8 T Cells That Have a from Multispecific DNA-Based Vaccines Elimination of Immunodominant Epitopes
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Identification of Mycobacterium tuberculosis CTL Epitopes Restricted by HLA-A*0201 in HHD Mice
CD8+ T cells are thought to play an important role in protective immunity to tuberculosis. The major histocompatibility complex class I subtype HLA-A*0201 is one of the most prevalent class I alleles, with a frequency of over 30% in most populations. HLA-A*0201 transgenic, H-2Db/mouse beta2-microglobulin double-knockout mice (HHD) which express human HLA-A*0201 but no mouse class I, was shown t...
متن کاملCostimulatory Effects of an Immunodominant Parasite Antigen Paradoxically Prevent Induction of Optimal CD8 T Cell Protective Immunity
Trypanosoma cruzi infection is controlled but not eliminated by host immunity. The T. cruzi trans-sialidase (TS) gene superfamily encodes immunodominant protective antigens, but expression of altered peptide ligands by different TS genes has been hypothesized to promote immunoevasion. We molecularly defined TS epitopes to determine their importance for protection versus parasite persistence. Pe...
متن کاملThe immunodominant CD8 T cell response to the human cytomegalovirus tegument phosphoprotein pp65(495-503) epitope critically depends on CD4 T cell help in vaccinated HLA-A*0201 transgenic mice.
Immunodominance hierarchies operating in immune responses to viral Ags limit the diversity of the elicited CD8 T cell responses. We evaluated in I-A(b+)/A2-HHD-II and HLA-DR1(+)/A2-DR1 mice the HLA-A*0201-restricted, multispecific CD8 T cell responses to the human CMV tegument phosphoprotein pp65 (pp65) Ag. Vaccination of mice with pp65-encoding DNA elicited high IFN-γ(+) CD8 T cell frequencies...
متن کاملشناسایی اپی توپهای سلولهای CD4+ T در پروتئین ترشحی MPB51 مایکوباکتریوم توبرکلوزیس در موشهای C57BL/6
Introduction & Objective: Both CD4+ type 1 helper (Th1) cells and CD8+ T cells play effective roles in protection against Mycobacterium tuberculosis infection. DNA vaccine encoding MPB51 can induce Th1-type immune responses and protective immunity upon challenge with M.tuberculosis. This study address to identify T-cell immunodominant epitopes on MPB51 in C57BL/6 mice. Materials & Methods : ...
متن کاملIn silico analysis of Ta9 gene polymorphism in an Iranian Theileria annulata schizont-infected cell line S15 vaccine strain and native isolates
Bovine theileriosis is a tick-borne disease caused by obligate intracellular parasites related to the genus Theileria. Cellular immune responses protect cattle against pathogens through the activation of immune cells. Nowadays, live, attenuated vaccine of Theileria annulata (T. annulata) is being produced in Iran and is recommended for active cattle immunization. Detection of the immunogenic a...
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