H2O2-induced mitochondrial fragmentation in C2C12 myocytes.
H2O2-induced mitochondrial fragmentation in C2C12 myocytes.
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DOI:
10.1016/j.freeradbiomed.2010.08.024
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发表时间:
2010-12-01
影响因子:
7.4
通讯作者:
Brooks, George A.
中科院分区:
文献类型:
--
作者:
Fan, Xiying;Hussien, Rajaa;Brooks, George A.
关键词:
In skeletal muscle and many other cell types, mitochondria exist as an elaborate and dynamic network in which “individual” mitochondria exist only transiently even under non-stimulated conditions. The balance of continuous mitochondrial fission and fusion defines the morphology of the mitochondrial reticulum. Environmental stimuli, such as oxidative stress, can influence fusion and fission rates, resulting in a transformation of the network's connectivity. Using confocal laser scanning microscopy of C2C12 mouse myocytes, we show that acute exposure to the reactive oxygen species (ROS) hydrogen peroxide (H2O2) induces a slow fragmentation of the mitochondrial reticulum that is reversible over 24 hours. Although H2O2 decomposes rapidly in culture medium, the full extent of fragmentation occurs 5-6 hours post-treatment, suggesting that H2O2 affects mitochondrial morphology by modulating cellular physiology. Supraphysiological (>1 mM) concentrations of H2O2 are cytotoxic, but lower concentrations (250 μM) sufficient to induce transient fragmentation do not lower cell viability. H2O2-induced mitochondrial fragmentation is preceded by decreases in inner mitochondrial membrane potential and maximal respiratory rate, suggesting a possible mechanism. Because H2O2 is produced in contracting muscle, our results raise the possibility that ROS generation may contribute to exercise-induced changes in mitochondrial morphology in vivo.
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影响因子:
64.5
作者:
Chen H;Vermulst M;Wang YE;Chomyn A;Prolla TA;McCaffery JM;Chan DC
通讯作者:
Chan DC
DOI:
10.1016/s0006-291x(03)00050-0
发表时间:
2003-02-21
影响因子:
3.1
作者:
Ishihara, N;Jofuku, A;Mihara, K
通讯作者:
Mihara, K
影响因子:
7.7
作者:
Bach, D;Naon, D;Zorzano, A
通讯作者:
Zorzano, A
影响因子:
11.4
作者:
Barsoum, Mark J.;Yuan, Hua;Bossy-Wetzel, Ella
通讯作者:
Bossy-Wetzel, Ella
DOI:
10.1083/jcb.200211046
发表时间:
2003-01-20
期刊:
The Journal of cell biology
影响因子:
--
作者:
Chen H;Detmer SA;Ewald AJ;Griffin EE;Fraser SE;Chan DC
通讯作者:
Chan DC