| Literature DB >> 27667666 |
Martin D Brand1, Renata L S Goncalves2, Adam L Orr2, Leonardo Vargas3, Akos A Gerencser2, Martin Borch Jensen2, Yves T Wang4, Simon Melov2, Carolina N Turk3, Jason T Matzen3, Victoria J Dardov3, H Michael Petrassi3, Shelly L Meeusen3, Irina V Perevoshchikova2, Heinrich Jasper2, Paul S Brookes4, Edward K Ainscow3.
Abstract
Using high-throughput screening we identified small molecules that suppress superoxide and/or H2O2 production during reverse electron transport through mitochondrial respiratory complex I (site IQ) without affecting oxidative phosphorylation (suppressors of site IQ electron leak, "S1QELs"). S1QELs diminished endogenous oxidative damage in primary astrocytes cultured at ambient or low oxygen tension, showing that site IQ is a normal contributor to mitochondrial superoxide-H2O2 production in cells. They diminished stem cell hyperplasia in Drosophila intestine in vivo and caspase activation in a cardiomyocyte cell model driven by endoplasmic reticulum stress, showing that superoxide-H2O2 production by site IQ is involved in cellular stress signaling. They protected against ischemia-reperfusion injury in perfused mouse heart, showing directly that superoxide-H2O2 production by site IQ is a major contributor to this pathology. S1QELs are tools for assessing the contribution of site IQ to cell physiology and pathology and have great potential as therapeutic leads.Entities:
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Year: 2016 PMID： 27667666 PMCID： PMC5061631 DOI： 10.1016/j.cmet.2016.08.012
Source DB: PubMed Journal: Cell Metab ISSN： 1550-4131 Impact factor: 27.287