Induction of apoptosis by Myagropsis myagroides extracts is associated with a caspase dependent pathway and reactive oxygen species generation in human cancer cells |
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Authors: | Byoung Ok Cho Hyung Won Ryu Yangkang So Chang Hyun Jin Myung-Woo Byun Dong Hyun Ahn Il Yun Jeong |
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Affiliation: | 1. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk, 580-185, Korea 2. Department of Culinary Nutrition, Woosong University, Daejeon, 300-718, Korea 3. Department of Food Science and Technology, Pukyong National University, Busan, 608-739, Korea
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Abstract: | The purpose of this study was to elucidate the mechanisms underlying apoptosis induced by an ethanol extracts from Myagropsis myagroides (ME) in HeLa, U937, and PC-3 cells. ME treatment for 24 h significantly inhibited cell viability in a dose-dependent manner, and induced apoptosis. Moreover, ME treatment triggered the cleavage of caspase-8, ?9, ?3, and poly(ADP-ribose) polymerase (PARP). A general caspase inhibitor (z-VAD-fmk) inhibited ME-induced activation of caspase-3, PARP cleavage, and cell death. ME treatment also triggered the release of cytochrome c from the mitochondria to the cytosol and stimulated the cleavage of Bid, up-regulation of Bax, and down-regulation of Bcl-2. Furthermore, ME treatment caused reactive oxygen species (ROS) generation. An antioxidant N-acetylcysteine (NAC) blocked MEinduced activation of caspase-3, PARP cleavage, and cell death. Overall, these results suggest that ME-induced apoptosis is mediated by a caspase dependent pathway and ROS generation in HeLa, U937, and PC-3 cells. |
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