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- W2096155110 abstract "The oligomeric nature of the viral envelope proteins has been partly held responsible for the observed differences in neutralization sensitivity between primary and laboratory-adapted strains of human immunodeficiency virus type 1 (HIV-1). However, recent evidence suggests that host factors can also modify the sensitivity of HIV-1 particles to neutralization. Having previously demonstrated that the acquisition of host-encoded intercellular adhesion molecule (ICAM)-1 proteins by newly formed viruses has a functional significance for the life cycle of HIV-1, we investigated whether the acquisition of host-derived ICAM-1 by HIV-1 could affect the virus sensitivity to neutralization. In this study, we have first shown that the physical presence of host cell membrane ICAM-1 on HIV-1 was not modifying virus sensitivity to neutralization by either two different anti-gp120 monoclonal antibodies (0.5β and 4.8D) or soluble CD4. However, the ability of the F105 anti-gp120 monoclonal antibody (specific for the CD4-binding site) to neutralize ICAM-1-bearing virions was diminished when target cells were pretreated with an lymphocyte function-associated antigen-1 (LFA-1)-activating antibody. Interestingly, ICAM-1/POS progeny viruses were found to be slightly more resistant to neutralization by individual human sera in target cells expressing a low-affinity form of LFA-1 than viruses devoid of host-encoded ICAM-1 proteins. This resistance was markedly enhanced when target cells expressed an activated LFA-1 form on their surface. These results suggest that the interaction between virally embedded host ICAM-1 and target cell surface LFA-1 should be considered a factor modulating neutralization sensitivity of HIV-1 by human sera from HIV-1-infected individuals." @default.
- W2096155110 created "2016-06-24" @default.
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- W2096155110 date "2000-03-01" @default.
- W2096155110 modified "2023-09-30" @default.
- W2096155110 title "Interaction between Virion-Bound Host Intercellular Adhesion Molecule-1 and the High-Affinity State of Lymphocyte Function-Associated Antigen-1 on Target Cells Renders R5 and X4 Isolates of Human Immunodeficiency Virus Type 1 More Refractory to Neutralization" @default.
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- W2096155110 doi "https://doi.org/10.1006/viro.2000.0190" @default.
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