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Hepatitis C virus (HCV) enters hepatocytes via various entry factors, including scavenger receptor BI (SR-B1), cluster of differentiation 81 (CD81), epidermal growth factor receptor (EGFR), claudin-1 (CLDN1), and occludin (OCLN). As CLDN1 and OCLN are not readily accessible due to their tight junctional localization, HCV likely accesses them by either disrupting cellular polarity or migrating to the tight junction. In this study, we image HCV entry into a three-dimensional polarized hepatoma system and reveal that the virus sequentially engages these entry factors through actin-dependent mechanisms. HCV initially localizes with the early entry factors SR-B1, CD81, and EGFR at the basolateral membrane and then accumulates at the tight junction in an actin-dependent manner. HCV associates with CLDN1 and then OCLN at the tight junction and is internalized via clathrin-mediated endocytosis by an active process requiring EGFR. Thus, HCV uses a dynamic and multi-step process to engage and enter host cells.
Pubmed ID: 29544098 RIS Download
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View all literature mentionsCell line HEK293T is a Transformed cell line with a species of origin Homo sapiens (Human)
View all literature mentionsCell line NT2-N is a Cancer cell line with a species of origin Homo sapiens (Human)
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