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Hedyotis Diffusa Willd extract induces apoptosis via activation of the mitochondrion-dependent pathway in human colon carcinoma cells

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Hedyotis Diffusa Willd has been used as a major component in several Chinese medicine formulations for the clinical treatment of colorectal cancer. However, the molecular mechanism of the anti-cancer activity of Hedyotis Diffusa Willd remains unclear. In the present study, we investigated the cellular effects of the ethanol extract of Hedyotis Diffusa Willd (EEHDW) in the HT-29 human colon carcinoma cell line. We found that EEHDW inhibited the growth of HT-29 cells demonstrating EEHDW-induced cell morphological changes and reduced cell viability in a dose- and time-dependent manner. Furthermore, we observed that EEHDW treatment resulted in DNA fragmentation, loss of plasma membrane asymmetry, collapse of mitochondrial membrane potential, activation of caspase-9 and caspase-3, and increase of the ratio of pro-apoptotic Bax to anti-apoptotic Bcl-2, suggesting that the HT-29 cell growth inhibitory activity of EEHDW was due to mitochondrion-mediated apoptosis, which may partly explain the anti-cancer activity of Hedyotis Diffusa Willd.
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Document Type: Research Article

Affiliations: Fujian Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Minhou Shangjie, Fuzhou, Fujian 350108, P.R. China

Publication date: November 1, 2010

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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