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학술대회자료
저자정보
Park, Soo-Young (Department of Medicine, College of Medicine) Kim, Sang-Chul (Department of Medicine, College of Medicine) Hyoun, Jae-Hee (Department of Medicine, College of Medicine) Lee, Nam-Ho (Department of Chemistry, College of Natural Science) Kim, Se-Jae (Department of Life Science, College of Natural Science, Cheju National University) Lee, Young-Ki (Department of Medicine, College of Medicine) Park, Deok-Bae (Department of Medicine, College of Medicine) Yoo, Eun-Sook (Department of Medicine, College of Medicine) Kang, Hee-Kyoung (Department of Medicine, College of Medicine)
저널정보
한국응용약물학회 한국응용약물학회 추계학술발표논문집 한국응용약물학회 2003년도 Annual Meeting of KSAP : International Symposium on Pharmaceutical and Biomedical Sciences on Obesity
발행연도
2003.1
수록면
82 - 82 (1page)

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The present study was undertaken to examine the cytotoxic effect of extract of Eurya emarginata against cancer cells and to develop an anti-cancer agent using components of its leaves. The crude extract of its leaves markedly inhibited the growth of leukemia cells including HL-60. When the HL-60 cells were treated with the extract, DNA fragmentation, morphologic changes and sub-Gl hypodiploid cells were observed. Therefore, the inhibitory effect of E. emarginata on the growth of the HL-60 cells appears to arise from the induction of apoptosis. Moreover, the extract markedly reduced c-Myc expression in a time-dependent manner. Eutigoside C showing the cytotoxic effect was isolated from the leaves of E. emarginata. Eutigoside C reduced the Bcl-2 protein and mRNA levels in a time-dependent manner, whereas the Bax protein and mRNA expression levels were slightly increased. When HL-60 cells were treated with eutigoside C, the release of cytochrome C from mitochondria into the cytosol was observed. Also, the expressions of the active forms of caspase 9 and 3 were increased and the activation of caspase 3 was demonstrated by the cleavage of Poly(ADP-ribose) polymerase, a vital substrate of effector caspase. The results indicate that the eutigoside C from E. emarginata induce apoptosis of HL-60 cells via the down-regulation of Bcl-2 expression and activation of caspases.

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