A role for TSPO in mitochondrial Ca(2+) homeostasis and redox stress signaling.
A role for TSPO in mitochondrial Ca(2+) homeostasis and redox stress signaling.
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DOI:
10.1038/cddis.2017.186
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发表时间:
2017-06-22
影响因子:
9
通讯作者:
Campanella M
中科院分区:
文献类型:
--
作者:
Gatliff J;East DA;Singh A;Alvarez MS;Frison M;Matic I;Ferraina C;Sampson N;Turkheimer F;Campanella M
The 18 kDa translocator protein TSPO localizes on the outer mitochondrial membrane (OMM). Systematically overexpressed at sites of neuroinflammation it is adopted as a biomarker of brain conditions. TSPO inhibits the autophagic removal of mitochondria by limiting PARK2-mediated mitochondrial ubiquitination via a peri-organelle accumulation of reactive oxygen species (ROS). Here we describe that TSPO deregulates mitochondrial Ca2+ signaling leading to a parallel increase in the cytosolic Ca2+ pools that activate the Ca2+-dependent NADPH oxidase (NOX) thereby increasing ROS. The inhibition of mitochondrial Ca2+ uptake by TSPO is a consequence of the phosphorylation of the voltage-dependent anion channel (VDAC1) by the protein kinase A (PKA), which is recruited to the mitochondria, in complex with the Acyl-CoA binding domain containing 3 (ACBD3). Notably, the neurotransmitter glutamate, which contributes neuronal toxicity in age-dependent conditions, triggers this TSPO-dependent mechanism of cell signaling leading to cellular demise. TSPO is therefore proposed as a novel OMM-based pathway to control intracellular Ca2+ dynamics and redox transients in neuronal cytotoxicity.
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DOI:
10.1523/jneurosci.1497-12.2013
发表时间:
2013-02-20
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Chen Y;Khan RS;Cwanger A;Song Y;Steenstra C;Bang S;Cheah JH;Dunaief J;Shindler KS;Snyder SH;Kim SF
通讯作者:
Kim SF
DOI:
10.1007/978-1-61779-382-0_14
发表时间:
2012-01-01
期刊:
MITOCHONDRIAL BIOENERGETICS: METHODS AND PROTOCOLS
影响因子:
--
作者:
Davidson, Sean M.;Duchen, Michael R.
通讯作者:
Duchen, Michael R.
影响因子:
4.4
作者:
Altuntas, Sara;D'Eletto, Manuela;Campanella, Michelangelo
通讯作者:
Campanella, Michelangelo
影响因子:
4.7
作者:
Banerjee, Jyotirmoy;Ghosh, Subhendu
通讯作者:
Ghosh, Subhendu
影响因子:
4.3
作者:
Colombini, M
通讯作者:
Colombini, M