Substantial envelope-specific CD8 T-cell immunity fails to control SIV disease.

Abstract:

:It is unknown which HIV proteins to target by vaccination in order to generate the most effective CD8 T-cell immunity. We recently immunized SIV(mac251)-infected pigtail macaques with Gag peptides or a cocktail of peptides spanning all SIV proteins, including SIV Env. High-level SIV Env-specific CD8 T-cell responses were generated and 7 novel Env-specific CD8 T-cell epitopes in 10 animals were mapped. Env-specific CD8 T-cell responses were significantly inferior to Gag-specific responses, and no better than unvaccinated control animals, in the control of SIV replication and prevention of disease. Escape mutations emerged within several Env-specific CTL epitopes, suggesting at least some pressure imparted by the Env CTL responses, but this did not correlate with significantly reduced SIV replication. We conclude Env-specific CTL may not be the most effective response to induce by vaccination.

journal_name

Virology

journal_title

Virology

authors

Peut V,Kent SJ

doi

10.1016/j.virol.2008.11.030

subject

Has Abstract

pub_date

2009-02-05 00:00:00

pages

21-7

issue

1

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(08)00755-1

journal_volume

384

pub_type

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