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• W1995087354 abstract "To elucidate the mechanisms underlying cross-clade T-cell reactivity, we evaluated responses to Gag peptides based on clades A, B, C, and M-group sequences at the epitope level by IFN-γ ELISpot assay in 25 subjects following primary clade B infection. T-cell reactivity to CON (consensus), COT (center of tree), and ANC (most recent common ancestor) B peptides was similar and a high level of cross-reactivity was noted to clade A, C, and M-group peptides. T-cell responses to 15 of the 16 epitopes reacted with at least 1 of the 2 heterologous peptides (A or C or both) and 7 epitopes were invariant across all 3 clades. The remaining 9 epitopes were associated with a total of 11 variant sequences, and with the exception of 1, all substitutions were outside the HLA anchor positions. We conclude that Gag-specific cross-clade T-cell responses producing IFN-γ can be detected in primary HIV-1 infection. Cross-reactivity is attributable to the recognized epitopes being either invariant across clades or differing by single amino acid substitutions outside the HLA anchor sites. Semi-conservative and non-conservative substitutions that presumably involve the T-cell receptor contact sites have significant effects on T-cell recognition. Finally, further studies are needed to determine if the detection of cross-clade IFN-γ T-cell responses indeed translates to cross-reactive antiviral activity." @default.
• W1995087354 created "2016-06-24" @default.
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• W1995087354 date "2007-01-01" @default.
• W1995087354 modified "2023-10-17" @default.
• W1995087354 title "Comprehensive epitope analysis of cross-clade Gag-specific T-cell responses in individuals with early HIV-1 infection in the US epidemic" @default.
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• W1995087354 doi "https://doi.org/10.1016/j.vaccine.2006.07.045" @default.
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