Inhibition of cell cycle progression by penta-acetyl geniposide in rat C6 glioma cells.

doi:10.1016/j.taap.2004.03.004

中山醫學大學機構典藏 CSMUIR > 醫學院 > 醫學系 > 期刊論文 > Item 310902500/11207

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Title:	Inhibition of cell cycle progression by penta-acetyl geniposide in rat C6 glioma cells.
Authors:	Chang, YC Chou, FP Huang, HP Hsu, JD Wang, CJ
Contributors:	中山醫學大學
Date:	2004
Issue Date:	2015-07-13T08:04:20Z (UTC)
ISSN:	0041-008X
Abstract:	Penta-acetyl geniposide, (Ac)5-GP, the acetylated compound of geniposide, is able to inhibit the growth of rat C6 glioma cells in culture and in the bearing rats. Our recent data indicated that the induction of cell apoptosis and cell cycle arrest at G0/gap phase 1 (G1) by (Ac)5-GP might be associated with the induction of p53 and c-Myc, and mediated via the apoptosis-related bcl-2 family proteins. In this report, we further investigated the mechanism involved in the cell cycle arrest induced by (Ac)5-GP in C6 glioma cells. The inhibitory effect of (Ac)5-GP on the cell cycle progression of C6 glioma cells which arrested cells at the G0/G1 phase was associated with a marked decrease in the protein expression of cyclin D1, and an induction in the content of cyclin-dependent kinase (cdk) inhibitor p21 protein. This effect was correlated with the elevation in p53 levels. Further immunoprecipitation studies found that, in response to the treatment, the formation of cyclin D1/cdk 4 complex declined, preventing the phosphorylation of retinoblastoma (Rb) and the subsequent dissociation of Rb/E2F complex. These results illustrated that the apoptotic effect of (Ac)5-GP, arresting cells at the G0/G1 phase, was exerted by inducing the expression of p21 that, in turn, repressed the activity of cyclin D1/cdk 4 and the phosphorylation of Rb.
URI:	https://ir.csmu.edu.tw:8080/ir/handle/310902500/11207 http://dx.doi.org/10.1016/j.taap.2004.03.004
Relation:	Toxicology and Applied Pharmacology [2004, 198(1):11-20]
Appears in Collections:	[醫學系] 期刊論文

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