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      Metabolic control of mitochondrial biogenesis through the PGC-1 family regulatory network.

      Biochimica et Biophysica Acta
      AMP-Activated Protein Kinases, metabolism, Animals, Chromatin Assembly and Disassembly, genetics, Gene Expression Regulation, Gene Knockout Techniques, Gene Regulatory Networks, Humans, Mice, Mitochondria, NF-E2-Related Factor 1, NF-E2-Related Factor 2, Receptors, Estrogen, Trans-Activators, Transcription Factors, biosynthesis, Transcription, Genetic

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          Abstract

          The PGC-1 family of regulated coactivators, consisting of PGC-1α, PGC-1β and PRC, plays a central role in a regulatory network governing the transcriptional control of mitochondrial biogenesis and respiratory function. These coactivators target multiple transcription factors including NRF-1, NRF-2 and the orphan nuclear hormone receptor, ERRα, among others. In addition, they themselves are the targets of coactivator and co-repressor complexes that regulate gene expression through chromatin remodeling. The expression of PGC-1 family members is modulated by extracellular signals controlling metabolism, differentiation or cell growth and in some cases their activities are known to be regulated by post-translational modification by the energy sensors, AMPK and SIRT1. Recent gene knockout and silencing studies of many members of the PGC-1 network have revealed phenotypes of wide ranging severity suggestive of complex compensatory interactions or broadly integrative functions that are not exclusive to mitochondrial biogenesis. The results point to a central role for the PGC-1 family in integrating mitochondrial biogenesis and energy production with many diverse cellular functions. This article is part of a Special Issue entitled: Mitochondria and Cardioprotection. Copyright © 2010 Elsevier B.V. All rights reserved.

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