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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2006.1
- 수록면
- 27 - 36 (10page)
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Objectives : This study was performed for the investigation of anticancer effects of methanol extract of Rheum Rhizoma (MeOH-RR) on a human liver cancer cell line (HepG2). Methods : To study the cytotoxic effect of MeOH-RR on HepG2 cells, the cell viability was determined by XTT reduction method and trypan blue exclusion assay. The cleavage of poly ADP-ribose polymerase (PARP), a substrate for caspase-3 and a typical sign of apoptosis, and the activation of procaspase-3, -8 and -9 were examined by western blot analysis. Furthermore, MeOH-RR-induced apoptosis was confirmed by DNA fragmentation. The release of cytochrome c from mitochondria to cytosol, the level of Bcl-2 and Bax were examined by western blot analysis. Results : MeOH-RR reduced proliferation of HepG2 cells in a dose-dependent manner at 24 h and 48 h treatment. MeOH-RR induced the activation of caspase-3, -8, and -9 and the cleavage of poly ADP-ribose polymerase (PARP), a substrate for caspase-3. Furthermore, treatment with MeOH-RR resulted in internucleosomal DNA fragmentation, evidenced by the formation of a DNA ladder on agarose gel, a hallmark of cells undergoing apoptosis. MeOH-RR downregulated Bcl-2, upregulated Bax, and increased the release of cytochrome c from the mitochondria into cytosol in a dose-dependent manner. Moreover, MeOH-RP increased caspase-3 activity. Conclusion : There results suggest that MeOH-RR induce apoptosis via mitochondrial pathway and caspase-3-dependent pathway in HepG2 cells. There results suggest that MeOH-RR is potentially useful as a chemotherapeutic agent in human liver cancer.
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