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標題: Avian reovirus sigma C protein induces apoptosis in cultured cells
作者: Shih, W.L.
Hsu, H.W.
Liao, M.H.
Lee, L.H.
Liu, H.J.
關鍵字: avian reovirus;apoptosis;sigma C;immunofluorescent assay;flow;cytometric analysis;virus-induced apoptosis;attachment protein;infected-cells;gene-expression;in-vitro;kappa-b;pathway;death;identification;chickens
Project: Virology
期刊/報告no:: Virology, Volume 321, Issue 1, Page(s) 65-74.
The avian reovirus (ARV) infection is associated with various disease conditions in poultry. However, the pathogenesis mechanisms are poorly characterized. In the present study, we clearly demonstrated that the sigmaC of ARV S1133 strain induced apoptosis in both BHK-21 and Vero cells. Five kinds of assays for apoptosis were used in analyzing ARV-infected BHK-21 and Vero cells: (1) assay for DNA ladders, (2) ELISA detection of cytoplasmic histone-associated DNA fragments, (3) nuclear staining with acridine orange, (4) Western blot, Northern blot, and immunofluorescent assay (IFA), and (5) flow cytometric analysis. The sigmaC protein of ARV could elicit apoptosis occurring in a dose- and time-dependent manner. The current results further our understanding of the function of sigmaC in cultured cells and suggest that sigmaC is a viral-encoded apoptin and possesses apoptosis-inducing ability. Furthermore, deletion analysis of the ARV sigmaC protein suggests that the carboxyl-terminus of sigmaC is important in mediating sigmaC-induced apoptosis because its deletion abolished the induction of apoptosis. (C) 2004 Elsevier Inc. All rights reserved.
ISSN: 0042-6822
DOI: 10.1016/j.virol.2003.12.004
Appears in Collections:分子生物學研究所

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