HIV: early virus-cell interactions.

C Grewe; A Beck; H R Gelderblom

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PubMed · 2398460

HIV: early virus-cell interactions.

C Grewe·A Beck·H R Gelderblom

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Abstract

Two entry mechanisms of HIV occur in both lymphocytes and macrophages incubated with purified virus suspensions: (a) direct fusion of the viral envelope with the cell membrane and (b) receptor-mediated endocytosis via clathrin-coated pits and vesicles. Both mechanisms are shown in detail in a time-interval series of electron micrographs. The two lipid bilayers of the viral envelope and of the cellular membrane usually fuse seamlessly within 1-3 min at 37 degrees C, but occasionally membrane ruptures occur, leading to rapid cytopathic effects, i.e., vacuolization and cytolysis only a few minutes later. In the course of virus-cell fusion, gp 120 is integrated into the cell membrane; subsequent syncytia formation was observed after 1 h of incubation. The core disintegrates and releases the viral ribonucleoprotein through the opening at the fusion site into the cytoplasm.

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Adsorption Cell Line Cell Membrane Cells, Cultured Clone Cells Cytopathogenic Effect, Viral Endocytosis HIV Envelope Protein gp120 HIV Envelope Protein gp41 HIV-1 HIV-2 Humans Immunohistochemistry Lipid Bilayers Lymphocytes Macrophages Microscopy, Electron Journal Article

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C Grewe, A Beck, H R Gelderblom. 1990. HIV: early virus-cell interactions.. https://pubmed.ncbi.nlm.nih.gov/2398460/

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