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논문 기본 정보

자료유형
학술저널
저자정보
Li, Hai-Bo (School of Basic Medical Sciences, Liaoning University of TCM) Yi, Xin (Department of pathobiology, Institute of Basic Medical Sciences) Gao, Jian-Mei (Department of Pharmacy, Shenyang Pharmaceutical University) Ying, Xi-Xiang (School of Pharmacy, Liaoning University of TCM) Guan, Hong-Quan (School of Basic Medical Sciences, Liaoning University of TCM) Li, Jian-Chun (Department of Pharmacy, Shenyang Pharmaceutical University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제30권 제12호
발행연도
2007.1
수록면
1,566 - 1,574 (9page)

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We have reported that the protective effect of Magnolol on TBHP-induced injury in human non-small lung cancer H460 cells is partially via a p53 dependent mechanism. In this study, we found that Magnolol displayed a stimulatory effect at low concentrations $(\leq20{\mu}M)$ whilst inhibitory effect at high concentrations $(\geq20{\mu}M)$ in H460 cells. To investigate the mechanism of inducing the biphasic effect in H460 cells with Magnolol, we showed that Magnolol stimulated DNA synthesis at low concentrations and displayed an inhibition effect at high concentrations in H460 cells. More importantly, the inhibition of DNA synthesis was accompanied by the S phase cell cycle arrest and the appearance of intense intracytoplasmic vacuoles. These vacuoles can be labeled by autophagic marker monodansylcadaverin (MDC), 3-methyladenine (3-MA), an inhibitor of autophagy, was able to inhibit the occurrence of autophagy. The results of the LDH activity assay and TUNEL assay also showed that Magnolol at high concentrations inhibiting H460 cell growth was not via apoptotic pathway. Furthermore, accompanied by the occurrence of autophagy, the expression of phospho-Akt was down-regulated but PTEN significantly was up-regulated. In conclusion, Magnolol induces H460 cells death by autophagy but not apoptotic pathway. Blockade of PI3K/PTEN/Akt pathway is maybe related to Magnolol-induced autophagy. Autophagic cells death induction by Magnolol underlines the potential utility of its induction as a new cancer treatment modality.

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