Regulation of Mitoflash Biogenesis and Signaling by Mitochondrial Dynamics.
Regulation of Mitoflash Biogenesis and Signaling by Mitochondrial Dynamics.
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线粒体动力学对线粒体生物发生和信号传导的调节
DOI:
10.1038/srep32933
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发表时间:
2016-09-13
影响因子:
4.6
通讯作者:
Cheng H
中科院分区:
文献类型:
--
作者:
Li W;Sun T;Liu B;Wu D;Qi W;Wang X;Ma Q;Cheng H
Mitochondria are highly dynamic organelles undergoing constant network reorganization and exhibiting stochastic signaling events in the form of mitochondrial flashes (mitoflashes). Here we investigate whether and how mitochondrial network dynamics regulate mitoflash biogenesis and signaling. We found that mitoflash frequency was largely invariant when network fragmentized or redistributed in the absence of mitofusin (Mfn) 1, Mfn2, or Kif5b. However, Opa1 deficiency decreased spontaneous mitoflash frequency due to superimposing changes in respiratory function, whereas mitoflash response to non-metabolic stimulation was unchanged despite network fragmentation. In Drp1- or Mff-deficient cells whose mitochondria hyperfused into a single whole-cell reticulum, the frequency of mitoflashes of regular amplitude and duration was again unaltered, although brief and low-amplitude “miniflashes” emerged because of improved detection ability. As the network reorganized, however, the signal mass of mitoflash signaling was dynamically regulated in accordance with the degree of network connectivity. These findings demonstrate a novel functional role of mitochondrial network dynamics and uncover a magnitude- rather than frequency-modulatory mechanism in the regulation of mitoflash signaling. In addition, our data support a stochastic trigger model for the ignition of mitoflashes.
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影响因子:
4.8
作者:
Lee, Hakjoo;Yoon, Yisang
通讯作者:
Yoon, Yisang
影响因子:
3.5
作者:
Chen H;Chan DC
通讯作者:
Chan DC
影响因子:
2
作者:
POZNANSKI, RR
通讯作者:
POZNANSKI, RR
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
影响因子:
11.4
作者:
Santo-Domingo, Jaime;Giacomello, Marta;Poburko, Damon;Scorrano, Luca;Demaurex, Nicolas
通讯作者:
Demaurex, Nicolas