Bluetongue virus (BTV) causes haemorrhagic disease in sheep and induces death in cultured mammalian cells. In the present study, BTV-induced apoptotic pathways in Vero cells were elucidated. Cells infected with BTV at 0.1 m.o.i underwent DNA fragmentation and membrane blebbing within 48 h postinfection. BTV-induced apoptosis was blocked by the pan-caspase inhibitor, z-VAD-FMK. Immuno-blotting using anti-caspase-8 and -9 antibodies detected the activation of the respective caspases. Flow cytometry analyses following 3, 3′ dihexyloxacarbocyanine iodide staining revealed the loss of mitochondrial membrane potential. Our study confirms the involvement of both caspase-dependent extrinsic and intrinsic pathways of apoptosis in BTV-infected cells.
Archives of Virology – Springer Journals
Published: Sep 1, 2007
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