Mitochondrion-mediated apoptosis induced by Rana grylio virus infection in fish cells.
A fish cell line, fathead minnow (FHM) cell, was used to investigate the alteration of mitochondrial dynamics and the mechanism of apoptosis under Rana grylio virus (RGV) infection. Microscopy observations, flow-cytometry analysis and molecular marker detection revealed the apoptotic fate of the RGV-infected cells. Some typical apoptotic characteristics, such as chromatin condensation, DNA fragmentation and mitochondrial fragmentation, were observed, and significantly morphological changes of mitochondria, including size, shape, internal structure and distribution, were revealed. The mitochondria in RGV-infected cells were aggregated around the viromatrix, and the aggregation could be blocked by colchicine. Moreover, the Deltapsim collapse was induced, and caspase-9 and caspase-3 were activated in the RGV-infected cells. In addition, NF-kappaB activation and intracellular Ca(2+) increase were also detected at different times after infection. The data revealed the detailed dynamics of mitochondrion-mediated apoptosis induced by an iridovirus, and provided the first report on mitochondrial fragmentation during virus-induced apoptosis in fish cells.
Huang
You-Hua
YH
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Wuhan 430072, China.
Huang
Xiao-Hong
XH
Gui
Jian-Fang
JF
Zhang
Qi-Ya
QY
D000818:Animals; D017209:Apoptosis / Q000502:physiology*; D002118:Calcium / Q000378:metabolism; D053148:Caspase 3 / Q000378:metabolism; D053453:Caspase 9 / Q000378:metabolism; D002460:Cell Line; D003530:Cyprinidae / Q000821:virology; D004789:Enzyme Activation; D046529:Microscopy, Electron, Transmission; D008928:Mitochondria / Q000502:physiology* / Q000648:ultrastructure; D016328:NF-kappa B / Q000378:metabolism; D017995:Ranavirus / Q000472:pathogenicity*
D016328:NF-kappa B; D053148:Caspase 3; D053453:Caspase 9; D002118:Calcium