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• W2023890537 startingPage "13125" @default.
• W2023890537 abstract "ABSTRACT Human immunodeficiency virus (HIV)-specific CD8 T lymphocytes are important for the control of viremia, but the relative utility of responses to the various HIV proteins is controversial. Immune responses that force escape mutations that exact a significant fitness cost from the mutating virus would help slow progression to AIDS. The HIV envelope (Env) protein is subject to both humoral and cellular immune responses, suggesting that multiple rounds of mutation are needed to facilitate viral escape. The Gag protein, however, has recently been shown to elicit a more effective CD8 T-cell immune response in humans. We studied 30 pigtail macaques for their CD8 T-lymphocyte responses to HIV-1 Env and simian immunodeficiency virus (SIV) Gag following prime/boost vaccination and intrarectal challenge with simian-human immunodeficiency virus SHIV mn229 . Eight CD8 Env-specific T-cell epitopes were identified and mapped in 10 animals. Animals that generated Env-specific CD8 T-cell responses had equivalent viral loads and only a modest advantage in retention of peripheral CD4 T lymphocytes compared to those animals without responses to Env. This contrasts with animals that generated CD8 T-cell responses to SIV Gag in the same trial, demonstrating superior control of viral load and a larger advantage in retention of peripheral CD4 T cells than Gag nonresponders. Mutational escape was common in Env but, in contrast to mutations in Gag, did not result in the rapid emergence of dominant escape motifs, suggesting modest selective pressure from Env-specific T cells. These results suggest that Env may have limited utility as a CD8 T-cell immunogen." @default.
• W2023890537 created "2016-06-24" @default.
• W2023890537 creator A5054025307 @default.
• W2023890537 creator A5081337080 @default.
• W2023890537 date "2007-12-01" @default.
• W2023890537 modified "2023-10-16" @default.
• W2023890537 title "Utility of Human Immunodeficiency Virus Type 1 Envelope as a T-Cell Immunogen" @default.
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• W2023890537 doi "https://doi.org/10.1128/jvi.01408-07" @default.
• W2023890537 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2169096" @default.
• W2023890537 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17898063" @default.
• W2023890537 hasPublicationYear "2007" @default.
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