PMID- 29126696 OWN - NLM STAT- MEDLINE DCOM- 20181022 LR - 20181022 IS - 1532-8600 (Electronic) IS - 0026-0495 (Linking) VI - 79 DP - 2018 Feb TI - Coordination of mitochondrial biogenesis by PGC-1alpha in human skeletal muscle: A re-evaluation. PG - 42-51 LID - S0026-0495(17)30303-7 [pii] LID - 10.1016/j.metabol.2017.11.001 [doi] AB - The transcriptional co-activator peroxisome proliferator-activated receptor gamma co-activator-1 alpha (PGC-1alpha) is proposed to coordinate skeletal muscle mitochondrial biogenesis through the integrated induction of nuclear- and mitochondrial-encoded gene transcription. This paradigm is based largely on experiments demonstrating PGC-1alpha's ability to co-activate various nuclear transcription factors that increase the expression of mitochondrial genes, as well as PGC-1alpha's direct interaction with mitochondrial transcription factor A within mitochondria to increase the transcription of mitochondrial DNA. While this paradigm is supported by evidence from cellular and transgenic animal models, as well as acute exercise studies involving animals, the up-regulation of nuclear- and mitochondrial-encoded genes in response to exercise does not appear to occur in a coordinated fashion in human skeletal muscle. This review re-evaluates our current understanding of this phenomenon by highlighting evidence from recent studies examining the exercise-induced expression of nuclear- and mitochondrial-encoded genes targeted by PGC-1alpha. We also highlight several possible theories that may explain the apparent inability of PGC-1alpha to coordinately up-regulate the expression of genes required for mitochondrial biogenesis in human skeletal muscle, and provide directions for future work exploring mitochondrial biogenic gene expression following exercise. CI - Copyright (c) 2017 Elsevier Inc. All rights reserved. FAU - Islam, Hashim AU - Islam H AD - School of Kinesiology and Health Studies, Queen's University, Kingston K7L 3N6, Ontario, Canada. Electronic address: hashim.islam@queensu.ca. FAU - Edgett, Brittany A AU - Edgett BA AD - School of Kinesiology and Health Studies, Queen's University, Kingston K7L 3N6, Ontario, Canada; Human Health and Nutritional Sciences, University of Guelph, Guelph N1G 2W1, Ontario, Canada. Electronic address: b.edgett@queensu.ca. FAU - Gurd, Brendon J AU - Gurd BJ AD - School of Kinesiology and Health Studies, Queen's University, Kingston K7L 3N6, Ontario, Canada. Electronic address: gurdb@queensu.ca. LA - eng PT - Journal Article PT - Review DEP - 20171108 PL - United States TA - Metabolism JT - Metabolism: clinical and experimental JID - 0375267 RN - 0 (PPARGC1A protein, human) RN - 0 (Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha) SB - IM MH - Exercise MH - Humans MH - Mitochondria, Muscle/metabolism/*physiology MH - Muscle, Skeletal/*growth & development/metabolism MH - Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha/*metabolism OTO - NOTNLM OT - Exercise metabolism OT - Mitochondrial gene regulation OT - PGC-1alpha OT - Skeletal muscle physiology OT - TFAM EDAT- 2017/11/12 06:00 MHDA- 2018/10/23 06:00 CRDT- 2017/11/12 06:00 PHST- 2017/08/15 00:00 [received] PHST- 2017/10/13 00:00 [revised] PHST- 2017/11/01 00:00 [accepted] PHST- 2017/11/12 06:00 [pubmed] PHST- 2018/10/23 06:00 [medline] PHST- 2017/11/12 06:00 [entrez] AID - S0026-0495(17)30303-7 [pii] AID - 10.1016/j.metabol.2017.11.001 [doi] PST - ppublish SO - Metabolism. 2018 Feb;79:42-51. doi: 10.1016/j.metabol.2017.11.001. Epub 2017 Nov 8.