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• W1981337355 startingPage "1365" @default.
• W1981337355 abstract "Colorectal cancer is the second most common cause of cancer death in the world and about half of the patients with colorectal cancer require adjuvant therapy after surgical resection. Therefore, the eradication of cancer cells via chemotherapy constitutes a viable approach to treating patients with colorectal cancer. In this study, the effects of bufalin isolated from a traditional Chinese medicine were evaluated and characterized in HT-29 and Caco-2 human colon cancer cells. Contrary to its well-documented apoptosis-promoting activity in other cancer cells, bufalin did not cause caspase-dependent cell death in colon cancer cells, as indicated by the absence of significant early apoptosis as well as poly(ADP-ribose) polymerase and caspase-3 cleavage. Instead, bufalin activated an autophagy pathway, as characterized by the accumulation of LC3-II and the stimulation of autophagic flux. The induction of autophagy by bufalin was linked to the generation of reactive oxygen species (ROS). ROS activated autophagy via the c-Jun NH(2)-terminal kinase (JNK). JNK activation increased expression of ATG5 and Beclin-1. ROS antioxidants (N-acetylcysteine and vitamin C), the JNK-specific inhibitor SP600125, and JNK2 siRNA attenuated bufalin-induced autophagy. Our findings unveil a novel mechanism of drug action by bufalin in colon cancer cells and open up the possibility of treating colorectal cancer through a ROS-dependent autophagy pathway." @default.
• W1981337355 created "2016-06-24" @default.
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• W1981337355 date "2011-10-01" @default.
• W1981337355 modified "2023-10-14" @default.
• W1981337355 title "Bufalin induces autophagy-mediated cell death in human colon cancer cells through reactive oxygen species generation and JNK activation" @default.
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• W1981337355 doi "https://doi.org/10.1016/j.freeradbiomed.2011.06.016" @default.
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