alexa Entry of vesicular stomatitis virus into L cells.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Heine JW, Schnaitman CA

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Abstract Early stages of the entry of vesicular stomatitis (VS) virus into L cells were followed by electron microscopy with the aid of ferritin antibody labeling. Cells which were infected at 0 C and incubated for 10 min at 37 C were reacted first with antiviral-antiferritin hybrid antibody and then with ferritin or fluorescein-labeled apoferritin. Extensive ferritin labeling of the cell surface was detected by both electron and fluorescence microscopy. The labeled regions of the cell surface were continuous with and indistinguishable from the rest of the host cell membrane, suggesting incorporation of viral antigens into the cell surface during viral penetration. Fusion of parental viral membrane with host cell membrane was further demonstrated by examining the localization of (3)H-labeled viral structural proteins in cells infected at 0 C and incubated for short periods at 37 C. Viral nucleoprotein was found in a soluble fraction of the cells which was derived primarily from the cytoplasm, whereas a particulate fraction from the cells was enriched in viral envelope proteins. Cytoplasmic membrane was isolated from these cells, and this membrane contained viral envelope proteins. These results suggest that penetration by VS virus occurs by fusion of the viral and cellular membranes followed by release of nucleo-protein into the cytoplasm.
This article was published in J Virol and referenced in Journal of Antivirals & Antiretrovirals

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