St. Louis encephalitis virus induced pathology in cultured cells

St. Louis encephalitis virus induced pathology in cultured cells Apoptosis is a highly regulated process of cellular self-destruction with diverse functions in multicellular organisms. It is known to be one of the mechanisms of viral pathogenesis. St. Louis encephalitis virus (SLEV), an arthropod-borne flavivirus, causes encephalitis disease of varying severity mostly in North America and in some regions of South America. This virus induces cytopathic effects in vertebrate cell lines, however, the mechanism by which this occurs is yet to be elucidated. SLEV induced cytopathic effects in K562 cells, a human mononuclear cell line, and in Neuro 2a cells, a mouse neuroblastoma cell line. SLEV-infected K562 and Neuro 2a cells underwent apoptotic cell death, whereas neither the cells inoculated with UV-inactivated virus nor the mock-infected cells developed cytopathic effects. The gene expression of regulators of apoptosis was investigated in K562 cells. A rise in the expression of the pro-apoptotic bax gene was detected specifically in the SLEV-infected K562 cells. These findings suggest that up-regulation of bax mRNA is correlated with cytopathic effects in SLEV-infected K562 cells. Archives of Virology Springer Journals

St. Louis encephalitis virus induced pathology in cultured cells

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