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• W2096302134 startingPage "4081" @default.
• W2096302134 abstract "Permissiveness of monocytes and macrophages to human immunodeficiency virus (HIV) infection is modulated by various stimuli. In this study we demonstrate that stimulation of primary monocytes and monocyte-derived macrophages (MDM) through the receptors for the Fc portion of immunoglobulin G (IgG) (FcgammaR) inhibits HIV type 1 (HIV-1) replication. Viral p24 production was decreased by 1.5 to 3 log units in MDM infected with both R5 and X4 HIV-1 strains upon stimulation by immobilized IgG but not upon stimulation by soluble IgG or by F(ab')(2) IgG fragments. Although MDM activation by immobilized IgG induced high levels of macrophage-derived chemokine secretion as well as a sustained down-regulation of CD4 and a transient decrease in CCR5 expression, these factors did not appear to play a major role in the suppression of HIV-1 replication. Single-cycle infection of FcgammaR-stimulated MDM with HIV-1 virions pseudotyped with either HIV-1 R5 or vesicular stomatitis virus G envelopes was inhibited, suggesting a postentry restriction of viral replication. PCR analyses of HIV-1 DNA intermediate replication forms suggested that reverse transcription is not affected by stimulation with immobilized human IgG, at least during the first replication cycle. The accumulation of PCR products corresponding to nuclear unintegrated two-long-terminal-repeat circles and the relative decrease of integrated HIV-1 DNA signals suggest an inhibition of proviral integration. Our data, showing that FcgammaR-mediated activation of MDM is a potent mechanism of HIV-1 suppression, raise the possibility that FcgammaR cross-linking by immune complexes may contribute to the control of viral replication in macrophages." @default.
• W2096302134 created "2016-06-24" @default.
• W2096302134 creator A5037084499 @default.
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• W2096302134 creator A5073406333 @default.
• W2096302134 creator A5081252030 @default.
• W2096302134 date "2003-04-01" @default.
• W2096302134 modified "2023-09-23" @default.
• W2096302134 title "Fcγ Receptor-Mediated Suppression of Human Immunodeficiency Virus Type 1 Replication in Primary Human Macrophages" @default.
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• W2096302134 doi "https://doi.org/10.1128/jvi.77.7.4081-4094.2003" @default.
• W2096302134 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/150663" @default.
• W2096302134 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12634367" @default.
• W2096302134 hasPublicationYear "2003" @default.
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