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• W1657655805 endingPage "15595" @default.
• W1657655805 startingPage "15590" @default.
• W1657655805 abstract "We have recently reported that the mean number of CCR5 coreceptors at the surface of CD4(+) T cells (CCR5 density) correlates with viral load and disease progression in HIV-1-infected persons. Here, we definitively establish that CCR5 density determines the level of virus production and identify the stages of HIV-1 replicative cycle modulated by this effect. We show, by transducing the CCR5 gene into CCR5(+) cells, that CCR5 overexpression resulted in an HIV-1 overinfectability. We sorted HOS-CD4(+)-CCR5(+) cells into two subpopulations, HOS(high) and HOS(low), the former expressing seven times more cell surface CCR5 molecules than the latter. Virus production was 30-80 times higher in HOS(high) cells than in HOS(low) cells after a single round of infection. In contrast, only twice as many viral particles entered the cytosol of HOS(high) cells as compared with the cytosol of HOS(low) cells. Yet, seven times as many early, and 24 times as many late, reverse transcription products were found in HOS(high) cells as compared with HOS(low) cells. Moreover, a 24- to 30-fold difference in the number of copies of integrated HIV-1 DNA was observed. No difference in HIV-1 LTR activation between the two cell lines was evident. Finally, we show that the higher virus production observed in HOS(high) cells is inhibited by pertussis toxin, a Galphai protein inhibitor. Thus, CCR5 density mainly modulates postentry steps of the virus life cycle, particularly the reverse transcription. These data explain why CCR5 density influences HIV-1 disease progression and underline the therapeutic interest of lowering CCR5 expression." @default.
• W1657655805 created "2016-06-24" @default.
• W1657655805 creator A5029233916 @default.
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• W1657655805 date "2002-11-14" @default.
• W1657655805 modified "2023-09-23" @default.
• W1657655805 title "Cell surface CCR5 density determines the postentry efficiency of R5 HIV-1 infection" @default.
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• W1657655805 doi "https://doi.org/10.1073/pnas.242134499" @default.
• W1657655805 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/137761" @default.
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• W1657655805 hasPublicationYear "2002" @default.
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