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- W1978404744 abstract "It has recently been shown that cell entry of mouse hepatitis virus type 2 (MHV-2) is mediated through endocytosis (Z. Qiu et al., J. Virol. 80:5768-5776, 2006). However, the molecular mechanism underlying MHV-2 entry is not known. Here we employed multiple chemical and molecular approaches to determine the molecular pathways for MHV-2 entry. Our results showed that MHV-2 gene expression and infectivity were significantly inhibited when cells were treated with chemical and physiologic blockers of the clathrin-mediated pathway, such as chlorpromazine and hypertonic sucrose medium. Furthermore, viral gene expression was significantly inhibited when cells were transfected with a small interfering RNA specific to the clathrin heavy chain. However, these treatments did not affect the infectivity and gene expression of MHV-A59, demonstrating the specificity of the inhibitions. In addition, overexpression of a dominant-negative mutant of caveolin 1 did not have any effect on MHV-2 infection, while it significantly blocked the caveolin-dependent uptake of cholera toxin subunit B. These results demonstrate that MHV-2 utilizes the clathrin- but not caveolin-mediated endocytic pathway for entry. Interestingly, when the cells transiently overexpressed a dominant-negative form (DIII) of Eps15, which is thought to be an essential component of the clathrin pathway, viral gene expression and infectivity were unaffected, although DIII expression blocked transferrin uptake and vesicular stomatitis virus infection, which are dependent on clathrin-mediated endocytosis. Thus, MHV-2 entry is mediated through clathrin-dependent but Eps15-independent endocytosis." @default.
- W1978404744 created "2016-06-24" @default.
- W1978404744 creator A5047111567 @default.
- W1978404744 creator A5084142209 @default.
- W1978404744 date "2008-08-15" @default.
- W1978404744 modified "2023-10-11" @default.
- W1978404744 title "Mouse Hepatitis Virus Type 2 Enters Cells through a Clathrin-Mediated Endocytic Pathway Independent of Eps15" @default.
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- W1978404744 doi "https://doi.org/10.1128/jvi.00837-08" @default.
- W1978404744 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2519582" @default.
- W1978404744 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18550663" @default.
- W1978404744 hasPublicationYear "2008" @default.
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