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- W4313356049 abstract "Abstract CD8+ T cells detect and clear virus-infected cells. During human immunodeficiency virus-1 (HIV-1) infection, different HIV-specific CD8+ T cell populations are expanded, each targeting a discreet epitope. These different HIV-specific CD8+ T cell populations do not arise equally, and instead establish a hierarchy (immunodominance) based on strength of T cell response to a given viral epitope. Our previous work has shown that relative immunodominance is a major determinant of the rate at which HIV can mutate to escape T cell immune pressure. The precise mechanism of how the first CD8+ T cell response to HIV is generated, and which factors determine T cell dominance is unclear. To investigate determinants of T cell immunodominance in acute HIV-1 infection (~45 days following infection), we determined all primary HIV-1 specific CD8+ T cell responses in 10 individuals in the RV217 early HIV cohort (ECHO). T cell responses were mapped against the unique infecting HIV virus/es in each individual using IFN-γ ELISpot. Across participants, the dominant T cell response mostly targeted variable regions of the HIV-1 genome. We detected a wide (4–13 epitopes) breadth of T cell response across our cohort that was independent of HLA haplotype, with all HIV-1 proteins targeted and different rates of virus escape observed. Ongoing studies are focusing on better understanding how factors, such as T cell receptor repertoire, avidity, antigen presentation and function contribute to T cell immunodominance, which in turn will inform HIV-1 vaccine design." @default.
- W4313356049 created "2023-01-06" @default.
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- W4313356049 date "2017-05-01" @default.
- W4313356049 modified "2023-09-26" @default.
- W4313356049 title "Understanding the determinants of CD8+ T cell immunodominance in acute HIV infection" @default.
- W4313356049 doi "https://doi.org/10.4049/jimmunol.198.supp.151.14" @default.
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