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Sökning: WFRF:(Levene Cyril)

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  • Lund, Nicole, et al. (författare)
  • The human P-k histo-blood group antigen provides protection against HIV-1 infection
  • 2009
  • Ingår i: Blood. - : American Society of Hematology. - 1528-0020 .- 0006-4971. ; 113:20, s. 4980-4991
  • Tidskriftsartikel (refereegranskat)abstract
    • Several human histo-blood groups are glycosphingolipids, including P/P1/P-k. Glycosphingolipids are implicated in HIV-host-cell-fusion and some bind to HIV-gp120 in vitro. Based on our previous studies on Fabry disease, where P-k accumulates and reduces infection, and a soluble P-k analog that inhibits infection, we investigated cell surface-expressed P-k in HIV infection. HIV-1 infection of peripheral blood-derived mononuclear cells (PBMCs) from otherwise healthy persons, with blood group P-1(k), where P-k is overexpressed, or blood group p, that completely lacks P-k, were compared with draw date-matched controls. Fluorescence-activated cell sorter analysis and/or thin layer chromatography were used to verify P-k levels. P-1(k) PBMCs were highly resistant to R5 and X4 HIV-1 infection. In contrast, p PBMCs showed 10- to 1000-fold increased susceptibility to HIV-1 infection. Surface and total cell expression of P-k, but not CD4 or chemokine coreceptor expression, correlated with infection. Pk liposome-fused cells and CD4(+) HeLa cells manipulated to express high or low P-k levels confirmed a protective effect of P-k. We conclude that P-k expression strongly influences susceptibility to HIV-1 infection, which implicates P-k as a new endogenous cell-surface factor that may provide protection against HIV-1 infection. (Blood. 2009;113:4980-4991)
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