Importance of mitochondrial dysfunction in oxidative stress response: A comparative study of gene expression profiles

被引:42
作者
Shibanuma, Motoko [1 ]
Inoue, Anna [1 ]
Ushida, Kyota [1 ]
Uchida, Tetsu [1 ]
Ishikawa, Fumihiro [1 ]
Mori, Kazunori [1 ]
Nose, Kiyoshi [1 ]
机构
[1] Showa Univ, Sch Pharm, Dept Canc Cell Biol, Shinagawa Ku, Tokyo 1428555, Japan
关键词
H(2)O(2); pseudo rho 0 cell; DNA microarray; MMPs; NMuMG cell; MAMMARY EPITHELIAL-CELLS; RESPIRATORY-CHAIN; HYDROGEN-PEROXIDE; ETHIDIUM-BROMIDE; DNA; GENERATION; DEATH;
D O I
10.3109/10715762.2011.564169
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
Mitochondria are considered to play an important role in oxidative stress response since they are a source of reactive oxygen species and are also targeted by these species. This study examined the mitochondrial conditions in cells of epithelial origin that were exposed to H(2)O(2) and found a decline in the membrane potential along with a specific loss of UQCRC1, a sub-unit of complex III, suggesting that mitochondrial dysfunction occurs upon exposure to oxidative stress. This observation led to the hypothesis that certain cellular responses to oxidative stress occurred because of mitochondrial dysfunction. When mitochondria-less (pseudo rho 0) cells were examined as a model of mitochondrial dysfunction, striking similarities were found in their cellular responses compared with those found in cells exposed to oxidative stress, including changes in gene expression and gelatinolytic enzyme activities, thus suggesting that cellular responses to oxidative stress were partly mediated by mitochondrial dysfunction. This possibility was further validated by microarray analysis, which suggested that almost one-fourth of the cellular responses to oxidative stress were mediated by mitochondrial dysfunction that accompanies oxidative stress, thereby warranting a therapeutic strategy that targets mitochondria for the treatment of oxidative stress-associated diseases.
引用
收藏
页码:672 / 680
页数:9
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