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- W2125434190 abstract "Chondrosarcoma is a malignant primary bone tumor that responds poorly to both chemotherapy and radiation therapy. (-)-Epigallocatechin-3-gallate (EGCG), the major polyphenol in green tea, has been shown to inhibit tumorigenesis and cancer cell growth in animal models. The aim of this study was to elucidate the mechanism of EGCG-induced apoptosis of human chondrosarcoma cells. EGCG induced cell apoptosis in human chondrosarcoma cell lines but not primary chondrocytes. EGCG induced upregulation of Bax and Bak, downregulation of Bcl-2 and Bcl-XL, and dysfunction of mitochondria in chondrosarcoma. We also found that the accumulation of reactive oxygen species (ROS) is a critical mediator in EGCG-induced cell death. EGCG induced apoptosis signal-regulating kinase 1 (ASK1) dephosphorylation and its dissociation from 14-3-3. Treatment of chondrosarcoma cells with EGCG induced p38 and c-jun-NH2-kinase (JNK) phosphorylation. Transfection with ASK1 siRNA or p38 and JNK mutant antagonized the EGCG-induced cell apoptosis. Therefore, EGCG triggered ROS and activated the ASK1-p38/JNK pathway, resulting chondrosarcoma cell death. Importantly, animal studies revealed a dramatic reduction in tumor volume after 24 days of treatment. Thus, EGCG may be a novel anti-cancer agent for the treatment of chondrosarcoma." @default.
- W2125434190 created "2016-06-24" @default.
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- W2125434190 date "2011-04-18" @default.
- W2125434190 modified "2023-09-26" @default.
- W2125434190 title "Epigallocatechin-3-gallate induces cell apoptosis of human chondrosarcoma cells through apoptosis signal-regulating kinase 1 pathway" @default.
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- W2125434190 doi "https://doi.org/10.1002/jcb.23072" @default.
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