Relationship between functional profile of HIV-1 specific CD8 T cells and epitope variability with the selection of escape mutants in acute HIV-1 infection.

Published online

Journal Article

In the present study, we analyzed the functional profile of CD8+ T-cell responses directed against autologous transmitted/founder HIV-1 isolates during acute and early infection, and examined whether multifunctionality is required for selection of virus escape mutations. Seven anti-retroviral therapy-naïve subjects were studied in detail between 1 and 87 weeks following onset of symptoms of acute HIV-1 infection. Synthetic peptides representing the autologous transmitted/founder HIV-1 sequences were used in multiparameter flow cytometry assays to determine the functionality of HIV-1-specific CD8+ T memory cells. In all seven patients, the earliest T cell responses were predominantly oligofunctional, although the relative contribution of multifunctional cell responses increased significantly with time from infection. Interestingly, only the magnitude of the total and not of the poly-functional T-cell responses was significantly associated with the selection of escape mutants. However, the high contribution of MIP-1β-producing CD8+ T-cells to the total response suggests that mechanisms not limited to cytotoxicity could be exerting immune pressure during acute infection. Lastly, we show that epitope entropy, reflecting the capacity of the epitope to tolerate mutational change and defined as the diversity of epitope sequences at the population level, was also correlated with rate of emergence of escape mutants.

Full Text

Duke Authors

Cited Authors

  • Ferrari, G; Korber, B; Goonetilleke, N; Liu, MKP; Turnbull, EL; Salazar-Gonzalez, JF; Hawkins, N; Self, S; Watson, S; Betts, MR; Gay, C; McGhee, K; Pellegrino, P; Williams, I; Tomaras, GD; Haynes, BF; Gray, CM; Borrow, P; Roederer, M; McMichael, AJ; Weinhold, KJ

Published Date

  • February 10, 2011

Published In

Volume / Issue

  • 7 / 2

Start / End Page

  • e1001273 -

PubMed ID

  • 21347345

Pubmed Central ID

  • 21347345

Electronic International Standard Serial Number (EISSN)

  • 1553-7374

Digital Object Identifier (DOI)

  • 10.1371/journal.ppat.1001273

Language

  • eng

Conference Location

  • United States