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http://dx.doi.org/10.5352/JLS.2013.23.4.518

Induction of Apoptosis by Ethanol Extract of Scutellaria baicalensis in Renal ell Carcinoma Caki-1 Cells  

Hwang, Won Deok (Department of Internal Medicine, Dongeui University College of Oriental Medicine)
Im, Yong-Gyun (Department of Internal Medicine, Dongeui University College of Oriental Medicine)
Son, Byoung Yil (Blue-Bio Industry Regional Innovation Center)
Park, Cheol (Department of Molecular Biology, College of Natural Sciences, Dongeui University)
Park, Dong Il (Department of Internal Medicine, Dongeui University College of Oriental Medicine)
Choi, Yung Hyun (Department of Biochemistry, Dongeui University College of Oriental Medicine)
Publication Information
Journal of Life Science / v.23, no.4, 2013 , pp. 518-528 More about this Journal
Abstract
Scutellaria baicalensis, belonging to the family Labiatae, is widely distributed in Korea, China, Mongolia, and eastern Siberia. It has been used in traditional medicine for various diseases, such as dysentery, pyrexia, jaundice, and carbuncles. In addition, S. baicalensis is reported to possess various beneficial pharmacological activities, including anti-inflammatory, antidiabetic, antiviral, antihypertension, antioxidant, and anticancer effects. However, the molecular mechanisms of its anticancer activity have not been clearly elucidated. In the present study, we investigated the proapoptotic effects of ethanol extract of S. baicalensis (EESB) on human renal cell carcinoma Caki-1 cells. The anti-proliferative activity of EESB was associated with apoptosis induction, which was associated with the up-regulation of death receptor 4, the Fas ligand, and Bax and the down-regulation of Bid, XIAP, and cIAP-1 proteins. EESB treatment also induced mitochondrial dysfunction, proteolytic activation of caspase-3, -8, and -9 and degradation of caspase-3 substrate proteins, such as poly (ADP-ribose) polymerase, ${\beta}$-catenin, and phospholipase C-${\gamma}1$. However, pretreatment of a pan-caspase inhibitor, z-VAD-fmk, significantly attenuated the EESB-induced apoptosis. Taken together, these findings suggest that EESB may be a potential chemotherapeutic agent. Further studies will be needed to identify the active compounds that confer the anticancer activity of S. baicalensis.
Keywords
Scutellaria baicalensis; renal cell carcinoma; apoptosis; caspase;
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