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- W2081781444 abstract "The hepatocellular transport pathways and cellular proteins utilized during the packaging and secretion of hepatitis B virus are poorly understood. In this study, we tested if the large GTPase dynamin, a protein involved in vesicle formation and secretion at the trans-Golgi network in hepatocytes, is also used by hepatitis B virus (HBV) in secreting viral proteins.Using HepG2.2.15 cells expressing the full-length HBV genome, we tested the effects of wild-type and mutant dynamin on the localization and secretion of two hepatitis B antigens, hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg). Distribution of these two antigens was analyzed morphologically in cells transiently transfected with wild-type or mutant dynamin constructs, whereas secretion of the antigens was measured by testing for antigen levels in the media of transfected cells.Mutant dynamin was found to induce a striking redistribution of HBsAg and HBeAg to a perinuclear compartment, as well as a decrease in the levels of HBsAg and HBeAg present in cell culture media indicating a reduction in viral protein secretion. At the electron microscopy level, cells expressing the mutant dynamin showed a marked accumulation of viral particles in dilated cisternae of an uncharacterized cellular compartment.Intact dynamin function is required for secretion of HBV proteins from hepatocytes through an uncharacterized cellular compartment." @default.
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- W2081781444 date "2003-01-01" @default.
- W2081781444 modified "2023-09-27" @default.
- W2081781444 title "The large GTPase dynamin is required for hepatitis B virus protein secretion from hepatocytes" @default.
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- W2081781444 doi "https://doi.org/10.1016/s0168-8278(02)00326-4" @default.
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