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Baicalin Induces Apoptosis in SW620 Human Colorectal Carcinoma Cells in Vitro and Suppresses Tumor Growth in Vivo
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, No.155, Sec.2, Linong Street, Taipei 112, Taiwan
Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan
* Author to whom correspondence should be addressed.
Received: 24 March 2012; in revised form: 26 March 2012 / Accepted: 26 March 2012 / Published: 29 March 2012
Abstract: In the United States, colorectal cancer (CRC) is the second most frequent malignancy and the fourth most common cause of cancer death. Baicalin, a flavone derivative isolated and purified from the dry root of Scutellaria, was assessed for its antitumor effects in human SW620 CRC cells. Baicalin (200 μM) inhibited proliferation of SW620 cells. Baicalin (200 μM) increased activities of caspase-3, -8, and -9 in SW620 cells. Furthermore, flow cytometric analysis of baicalin-treated SW620 cells showed an increase in sub-G1 cells, and the dihydroethidium assay showed significant enhancement of intracellular peroxide production in baicalin-treated cells. Addition of N-acetylcysteine prevented most of the baicalin-induced apoptosis, which in turn mediated cytotoxicity in human SW620 cells. In vivo, baicalin (50 mg/kg/day, i.p.) treatment inhibited 55% of tumor growth in xenografted nude mice by 4 weeks, compared to that of the vehicle control (p < 0.05). Baicalin had no noteworthy influence on body weight. Thus, we suggest the development of baicalin as a potential leading antitumor agent in CRC.
Keywords: cancer; apoptosis; SW620
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Chen, W.-C.; Kuo, T.-H.; Tzeng, Y.-S.; Tsai, Y.-C. Baicalin Induces Apoptosis in SW620 Human Colorectal Carcinoma Cells in Vitro and Suppresses Tumor Growth in Vivo. Molecules 2012, 17, 3844-3857.
Chen W-C, Kuo T-H, Tzeng Y-S, Tsai Y-C. Baicalin Induces Apoptosis in SW620 Human Colorectal Carcinoma Cells in Vitro and Suppresses Tumor Growth in Vivo. Molecules. 2012; 17(4):3844-3857.
Chen, Wen-Cheng; Kuo, Tsu-Hsiang; Tzeng, Yi-Shiuan; Tsai, Ying-Chieh. 2012. "Baicalin Induces Apoptosis in SW620 Human Colorectal Carcinoma Cells in Vitro and Suppresses Tumor Growth in Vivo." Molecules 17, no. 4: 3844-3857.