| Literature DB >> 15337265 |
Yuanbin Xie1, Yanling Liu, Chi Ma, Zhongmin Yuan, Wenya Wang, Zhenyu Zhu, Guoquan Gao, Xianguo Liu, Hengxin Yuan, Ruzhu Chen, Shoujian Huang, Xuelan Wang, Xiaonan Zhu, Xuemin Wang, Zixu Mao, Mingtao Li.
Abstract
Previous studies have demonstrated that c-Jun NH2-terminal protein kinase (JNK) plays a crucial role in neuronal apoptosis. Here, we report that indirubin-3'-oxime, a known effective inhibitor of cyclin-dependent kinases (CDKs) and glycogen synthase kinase 3-beta (GSK-3beta), has a significant inhibitory effect on JNK. Kinase assay showed that indirubin-3'-oxime directly inhibited the activity of all three isoforms of JNK (JNK1, and JNK3) in vitro, with half inhibition dose (IC50) of 0.8 microM, 1.4 microM, and 1.0 microM, respectively. In cerebellar granule neurons (CGNs), indirubin-3'-oxime blocked c-Jun phosphorylation induced by potassium withdrawal and prevented CGNs from apoptosis in a dose dependent manner. However, inhibitors of CDKs and GSK-3beta were ineffective in reducing c-Jun phosphorylation both in vitro and in vivo, suggesting that indirubin-3'-oxime prevents c-Jun phosphorylation independent of its inhibition on CDKs and GSK-3beta. Our studies give further supports for JNK-targeting strategy in preventing neuronal apoptosis.Entities:
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Year: 2004 PMID： 15337265 DOI： 10.1016/j.neulet.2004.06.044
Source DB: PubMed Journal: Neurosci Lett ISSN： 0304-3940 Impact factor: 3.046