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- W1972425992 abstract "Monocytes treated with interferon-alpha (IFN-alpha) at virus challenge show no evidence of human immunodeficiency virus (HIV) infection: no p24 antigen or reverse transcriptase (RT) activity, no viral mRNA and no proviral DNA. Levels of p24 antigen and RT activity in monocytes infected with HIV 1-3 weeks before IFN-alpha treatment gradually decrease to baseline. HIV-induced cytopathic changes are markedly reduced, as are levels of HIV mRNA: the frequency of productively infected cells is less than or equal to 1%. But, levels of proviral DNA in the IFN-alpha-treated and control HIV-infected cells are indistinguishable, and remain so through 3 weeks. Large quantities of proviral DNA in IFN-alpha-treated cells with little active transcription suggest true microbiological latency. The major potential source for IFN-alpha in HIV-infected patients is the macrophage. With any of 15 virus isolates, tumor necrosis factor-alpha, interleukin-1 beta, interleukin-6, IFN-omega or IFN-beta are not detected nor the mRNA expressed in HIV-infected or uninfected monocytes. Both uninfected and HIV-infected monocytes produce high levels of these cytokines after treatment with synthetic double-stranded RNA (poly-I:C). Uninfected monocytes also produce high levels of IFN-alpha after treatment with Poly-I:C, Newcastle disease virus or herpes simplex virus. In marked contrast, HIV-infected monocytes express no IFN-alpha activity or mRNA before or after treatment with any of these agents. The markedly diminished capacity of HIV-infected monocyte to produce IFN-alpha reflects a specific transcriptional block and may be an adaptive mechanism of virus to alter basic microbicidal functions of this cell.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1972425992 date "1991-01-01" @default.
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- W1972425992 title "Regulation of Cytokine and Viral Gene Expression in Monocytes Infected with the Human Immunodeficiency Virus" @default.
- W1972425992 doi "https://doi.org/10.1159/000163647" @default.
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