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Korean Society for Biochemistry and Molecular Biology (생화학분자생물학회)
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Sarcopenia targeting with autophagy mechanism by exercise

  • Park, Sung Sup (Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Seo, Young-Kyo (Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kwon, Ki-Sun (Aging Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB))
  • Received : 2018.10.30
  • Published : 2019.01.31
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Abstract

The loss of skeletal muscle, called sarcopenia, is an inevitable event during the aging process, and significantly impacts quality of life. Autophagy is known to reduce muscle atrophy caused by dysfunctional organelles, even though the molecular mechanism remains unclear. Here, we have discuss the current understanding of exercise-induced autophagy activation in skeletal muscle regeneration and remodeling, leading to sarcopenia intervention. With aging, dysregulation of autophagy flux inhibits lysosomal storage processes involved in muscle biogenesis. AMPK-ULK1 and the $FoxO/PGC-1{\alpha}$ signaling pathways play a critical role in the induction of autophagy machinery in skeletal muscle, thus these pathways could be targets for therapeutics development. Autophagy has been also shown to be a critical regulator of stem cell fate, which determines satellite cell differentiation into muscle fiber, thereby increasing muscle mass. This review aims to provide a comprehensive understanding of the physiological role of autophagy in skeletal muscle aging and sarcopenia.

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