P53-mediated mitochondrial dysfunction by proteasome inhibition in dopaminergic SH-SY5Y

被引:31
作者
Nakaso, K [1 ]
Yoshimoto, Y [1 ]
Yano, H [1 ]
Takeshima, T [1 ]
Nakashima, K [1 ]
机构
[1] Tottori Univ, Fac Med, Inst Neurol Sci, Dept Neurol, Yonago, Tottori 6838504, Japan
关键词
p53; Bax; mitochondria; JC-1; ubiquitin-proteasome system; Parkinson's disease;
D O I
10.1016/j.neulet.2003.10.048
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Decreased proteasome activity is an important pathology in Parkinson's disease (PD), which is related to cell death and Lewy body formation. In this study, we show that p53-activity may correlate with neuronal death via the mitochondrial pathway in PD model. The proteasome inhibitor, MG132, induced the accumulation of p53 in human dopaminergic neuroblastoma SH-SY5Y cells. The increased stabilization of p53 upregulated the level of Bax and mitochondrial depolarization. These events were inhibited by the p53 inhibitor, pifithrin-alpha (PFT). Cell viability analyzes demonstrated that PFT partially prevented MG132-induced cell death. These results suggest that p53 is a candidate as an intermediary between the proteasome system and mitochondria-related neuronal death in PD. (C) 2003 Elsevier Ireland Ltd. All rights reserved.
引用
收藏
页码:213 / 216
页数:4
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