Activations of both extrinsic and intrinsic pathways in HCT 116 human colorectal cancer cells contribute to apoptosis through p53-mediated ATM/Fas signaling by Emilia sonchifolia extract, a folklore medicinal plant

Yu Hsuan Lan, Jo Hua Chiang, Wen Wen Huang, Chi Cheng Lu, Jing Gung Chung, Tian Shung Wu, Jia Hua Jhan, Kuei Li Lin, Shu Jen Pai, Yu Jen Chiu, Minoru Tsuzuki, Jai Sing Yang

研究成果: Article

30 引文 斯高帕斯(Scopus)

摘要

Emilia sonchifolia (L.) DC (Compositae), an herbaceous plant found in Taiwan and India, is used as folk medicine. The clinical applications include inflammation, rheumatism, cough, cuts fever, dysentery, analgesic, and antibacteria. The activities of Emilia sonchifolia extract (ESE) on colorectal cancer cell death have not been fully investigated. The purpose of this study explored the induction of apoptosis and its molecular mechanisms in ESE-treated HCT 116 human colorectal cancer cells in vitro. The methanolic ESE was characterized, and γ-humulene was formed as the major constituent (63.86%). ESE induced cell growth inhibition in a concentration- and time-dependent response by MTT assay. Apoptotic cells (DNA fragmentation, an apoptotic catachrestic) were found after ESE treatment by TUNEL assay and DNA gel electrophoresis. Alternatively, ESE stimulated the activities of caspase-3, -8, and -9 and their specific caspase inhibitors protected against ESE-induced cytotoxicity. ESE promoted the mitochondria-dependent and death-receptor- associated protein levels. Also, ESE increased ROS production and upregulated the levels of ATM, p53, and Fas in HCT 116 cells. Strikingly, p53 siRNA reversed ESE-reduced viability involved in p53-mediated ATM/Fas signaling in HCT 116 cells. In summary, our result is the first report suggesting that ESE may be potentially efficacious in the treatment of colorectal cancer.

原文English
文章編號178178
期刊Evidence-based Complementary and Alternative Medicine
2012
DOIs
出版狀態Published - 2012

All Science Journal Classification (ASJC) codes

  • Complementary and alternative medicine

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