Abstract
The aim of this study was to examine whether or not membrane fluidity directly influences infection by enveloped viruses, and, more precisely here, the susceptibility of A/J mouse hepatocytes to Mouse Hepatitis Virus type 3 (MHV3). We therefore studied, in parallel, the effects on hepatocyte membrane fluidity and on intracellular viral titre of two treatments, i) a hypercholesterolaemic diet to increase the hepatocyte membrane cholesterol content, ii) direct phosphatidylserine incorporation into hepatocyte membrane. Membrane fluidity was monitored on isolated hepatocytes by fluorescence anisotropy with TMA-DPH, and the viral titre was determined by plaque assay. The results clearly demonstrate that membrane fluidity is not directly involved in viral infection mechanisms.
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