title: Globular CTRP3 promotes mitochondrial biogenesis in cardiomyocytes through AMPK/PGC-1α pathway.
abstract: Mitochondrial biogenesis is crucial for the maintenance of mitochondrial function and cellular homeostasis. C1q/tumor necrosis factor-related protein-3 (CTRP3) is an adipokine that owns multiple functions on metabolic and cardiovascular diseases. However, whether CTRP3 affects mitochondrial biogenesis in cardiomyocytes remains unknown.
  
  
  
  Neonatal rat ventricular myocytes were cultured and treated with globular CTRP3 (gCTRP3). The expression of mitochondrial biogenesis related genes was measured by real-time PCR and western blot analysis. Mitochondrial morphology was assessed by a transmission electron microscope. ATP content, oxygen consumption rate (OCR), and sirtuin1 activity were measured with commercial kits.
  
  
  
  gCTRP3 increased the expression of peroxisome proliferators activated receptor-γ co-activator-1α (PGC-1α), nuclear respiratory factor 1 (NRF-1), NRF-2, mitochondrial transcription factor A (TFAM), cytochrome B, and oxidative phosphorylation complexes III and V, and increased mitochondrial cristae components and OCR. Additionally, gCTRP3 enhanced mitochondrial DNA copy number and ATP content, while the induction was inhibited by knockdown of PGC-1α via small interfering RNA. gCTRP3 increased phosphorylation of AMP-activated protein kinase (AMPK), whereas adenine 9-β-d-arabinofuranoside (AraA), an AMPK inhibitor, attenuated gCTRP3-mediated induction of NRF-1, TFAM, and complexes III and V. gCTRP3 increased both the expression and activity of sirtuin1, whereas inhibition of sirtuin1 by EX-527 attenuated gCTRP3-induced responses. Meanwhile, gCTRP3-mediated activation of sirtuin1 was attenuated by AraA. Moreover, gCTRP3 restored the reduction of sirtuin1, PGC-1α, NRF-1, complex III and ATP content induced by hypoxia-reoxygenation injury.
  
  
  
  CTRP3 promotes mitochondrial biogenesis in cardiomyocytes via AMPK/PGC-1α pathway.
  
  
  
  CTRP3 is an endogenous modulator for mitochondrial biogenesis, and may protect cardiomyocytes by ameliorating mitochondrial dysfunction.
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
authors: Cheng-Lin
authors: CL
authors: Zhang
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
authors: Han
authors: H
authors: Feng
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
authors: Li
authors: L
authors: Li
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
authors: Jin-Yu
authors: JY
authors: Wang
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.
authors: Dan
authors: D
authors: Wu
authors: Department of Geriatrics, Peking University Third Hospital, Beijing 100191, China.
authors: Yan-Ting
authors: YT
authors: Hao
authors: Department of Geriatrics, Peking University Third Hospital, Beijing 100191, China.
authors: Zheng
authors: Z
authors: Wang
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.. Electronic address: zhangy18@bjmu.edu.cn.
authors: Yan
authors: Y
authors: Zhang
authors: Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, China.; Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China.. Electronic address: pathophy@bjmu.edu.cn.
authors: Li-Ling
authors: LL
authors: Wu
mesh_terms: D055372:AMP-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D000107:Acetylation / Q000187:drug effects; D000818:Animals; D002478:Cells, Cultured; D000860:Hypoxia / Q000378:metabolism; D024101:Mitochondrial Proteins / Q000378:metabolism; D008954:Models, Biological; D032383:Myocytes, Cardiac / Q000187:drug effects / Q000378:metabolism* / Q000648:ultrastructure; D001678:Organelle Biogenesis; D010100:Oxygen / Q000494:pharmacology; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha / Q000378:metabolism*; D017207:Rats, Sprague-Dawley; D015398:Signal Transduction / Q000187:drug effects; D056564:Sirtuin 1 / Q000378:metabolism; D048069:Tumor Necrosis Factors / Q000378:metabolism*
chemical_list: C506069:C1QTNF3 protein, human; D024101:Mitochondrial Proteins; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; C501429:Ppargc1a protein, rat; D048069:Tumor Necrosis Factors; D055372:AMP-Activated Protein Kinases; D056564:Sirtuin 1; D010100:Oxygen
keywords: AMP-activated protein kinase; C1q/tumor necrosis factor-related protein-3; Mitochondrial biogenesis; Peroxisome proliferators activated receptor-γ co-activator-1α; Sirtuin1