Publication: Mitochondrial complex i deficiency increases protein acetylation and accelerates heart failure
Issued Date
2013-08-06
Resource Type
ISSN
19327420
15504131
15504131
Other identifier(s)
2-s2.0-84881348520
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Mahidol University
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SCOPUS
Bibliographic Citation
Cell Metabolism. Vol.18, No.2 (2013), 239-250
Suggested Citation
Georgios Karamanlidis, Chi Fung Lee, Lorena Garcia-Menendez, Stephen C. Kolwicz, Wichit Suthammarak, Guohua Gong, Margaret M. Sedensky, Philip G. Morgan, Wang Wang, Rong Tian Mitochondrial complex i deficiency increases protein acetylation and accelerates heart failure. Cell Metabolism. Vol.18, No.2 (2013), 239-250. doi:10.1016/j.cmet.2013.07.002 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/31245
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Title
Mitochondrial complex i deficiency increases protein acetylation and accelerates heart failure
Abstract
Mitochondrial respiratory dysfunction is linked to the pathogenesis of multiple diseases, including heart failure, but the specific mechanisms for this link remain largely elusive. We modeled the impairment of mitochondrial respiration by the inactivation of the Ndufs4 gene, a protein critical for complex I assembly, in the mouse heart (cKO). Although complex I-supported respiration decreased by >40%, the cKO mice maintained normal cardiac function in vivo and high-energy phosphate content in isolated perfused hearts. However, the cKO mice developed accelerated heart failure after pressure overload or repeated pregnancy. Decreased NAD+/NADH ratio by complex I deficiency inhibited Sirt3 activity, leading to an increase in protein acetylation and sensitization of the permeability transition in mitochondria (mPTP). NAD+precursor supplementation to cKO mice partially normalized the NAD+/NADH ratio, protein acetylation, and mPTP sensitivity. These findings describe a mechanism connecting mitochondrial dysfunction to the susceptibility to diseases and propose a potential therapeutic target. © 2013 Elsevier Inc.