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AIDS Res Hum Retroviruses. 1994 Oct;10(10):1279-87.

An animal model for antilentiviral therapy: effect of zidovudine on viral load during acute infection after exposure of macaques to simian immunodeficiency virus.

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Laboratoire de Neuropathologie Expérimentale et Neurovirologie, Centre de Recherches du Service de Santé des Armèes, Fontenay-aux-Roses, France.


We analyzed the kinetics of the virological and immunological events that occurred in four AZT-treated cynomolgus macaques during the acute infection that followed their exposure to the simian immunodeficiency virus (SIVmac251) grown on monkey PBMCs in a cell-free stock solution. These events included changes in the CD4+ and CD8+ T lymphocyte subsets, p27 antigenemia, infectious serum virus, and cell-associated virus loads. The kinetics of these changes proved strikingly similar to those reported in human HIV-1 infection. Four other SIV-exposed macaques were treated with placebo instead of AZT. We demonstrated that AZT does not prevent SIV infection, even when administered before SIV inoculation. However, the peaks of p27 antigenemia and of serum and cellular viremia were significantly smaller and occurred significantly later in the monkeys given AZT than in those given placebo.

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