Reactive oxygen species generated from the mitochondrial electron transport chain induce cytochrome c dissociation from beef-heart submitochondrial particles via cardiolipin peroxidation.: Possible role in the apoptosis

被引:195
作者
Petrosillo, G
Ruggiero, FM
Pistolese, M
Paradies, G
机构
[1] Univ Bari, Dept Biochem & Mol Biol, I-70126 Bari, Italy
[2] Univ Bari, CNR, Unit Study Mitochondria & Bioenerget, I-70126 Bari, Italy
关键词
reactive oxygen species; cytochrome c; cardiolipin; apoptosis;
D O I
10.1016/S0014-5793(01)03206-9
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Cytochrome c release from mitochondria is a critical event in the apoptosis induction. Dissociation of cytochrome c from the mitochondrial inner membrane (IMM) is a necessary first step for cytochrome c release. In the present study, the effect of reactive oxygen species (ROS) on the dissociation of cytochrome c from beef-heart submitochondrial particles (SMP) and on the cardiolipin content was investigated. Exposure of SNIP to mitochondrial-mediated ROS generation resulted in a large dissociation of cytochrome c from SMP and in a parallel loss of cardiolipin. Both these effects were directly and significantly correlated and also abolished by superoxide dismutase+catalase. These results demonstrate that ROS generation induces the dissociation of cytochrome c from IMM via cardiolipin peroxidation. The data may prove useful in clarifying the molecular mechanism underlying the release of cytochrome c from the mitochondria to the cytosol. (C) 2001 Published by Elsevier Science B.V. on behalf of the Federation of European Biochemical Societies.
引用
收藏
页码:435 / 438
页数:4
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