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논문 기본 정보

자료유형
학술대회자료
저자정보
Kim, Sang-Chul (Department of Medicine, College of Medicine, Cheju National University) Park, Soo-Young (Department of Medicine, College of Medicine, Cheju National University) Hyoun, Jae-Hee (Department of Medicine, College of Medicine, Cheju National University) Kang, Ji-Hoon (Department of Medicine, College of Medicine, Cheju National University) Lee, Young-Ki (Department of Medicine, College of Medicine, Cheju National University) Park, Deok-Bae (Department of Medicine, College of Medicine, Cheju National University) Yoo, Eun-Sook (Department of Medicine, College of Medicine, Cheju National University) Kang, Hee-Kyoung (Department of Medicine, College of Medicine, Cheju National University)
저널정보
한국응용약물학회 한국응용약물학회 추계학술발표논문집 한국응용약물학회 2003년도 Annual Meeting of KSAP : International Symposium on Pharmaceutical and Biomedical Sciences on Obesity
발행연도
2003.1
수록면
81 - 81 (1page)

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The present study was taken to examine the inhibitory effect of extracts of Scytosiphon lomentaria, a marine alga growing in Jeju Island, on the growth of cancer cells and to develop an anti-cancer agent using components of S. lomemtaria. The effect was observed by the measurement of metabolic activity using colorimetric 3-(4,5-dimethylthiazol)-2,5-diphenyltetrazolium bromide (MTT) assay. In results, crude extract of this alga markedly inhibited the growth of leukemia cell lines such as HL-60 and KG-1, but could scarcely inhibit the growth of normal cells (HEL299) and adenocarcinoma cells (SNU-16 and HCT-I5). When HL-60 cells were treated with the extract, DNA fragmentation and the increase of proportion of sub-G1 hypodiploid cells were observed. Therefore, the inhibitory effect of S. lomemtaria on the growth of HL-60 cells seems to arise from the induction of apoptosis. In order to understand the mechanism of apoptosis inducton by S. lomemtaria, we examined the changes of Bcl-2 and Bax expression. The extract reduced Bcl-2, an anti-apoptotic protein, but increased Bax, a pro-apoptotic protein in a dose-dependent manner. When we examined the activation of caspase-3, an effector of apoptosis, the expression of active form(19 kDa) of caspase-3 was increased and the increase of their activities was demonstrated by the cleavage of poly(ADP-ribose)polymerase, a substrate of caspase-3, to 85 kDa. The results indicate that extract of S. lomentaria induces the apoptosis of HL-60 cells via the down-regulation of Bc1-2 and the activation of caspases.

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