Molecular and Cellular Biochemistry

, Volume 349, Issue 1, pp 139–147

Muscle regeneration occurs to coincide with mitochondrial biogenesis

Authors

    • Department of Life Sciences, Graduate School of Arts and SciencesThe University of Tokyo
  • Naoki Kotake
    • Department of Advanced Interdisciplinary Studies (AIS), Graduate School of EngineeringThe University of Tokyo
  • Shigeru Yamada
    • Department of Life Sciences, Graduate School of Arts and SciencesThe University of Tokyo
Article

DOI: 10.1007/s11010-010-0668-2

Cite this article as:
Wagatsuma, A., Kotake, N. & Yamada, S. Mol Cell Biochem (2011) 349: 139. doi:10.1007/s11010-010-0668-2

Abstract

We investigated the expression of the nuclear-encoded genes controlling the mitochondrial properties in the mouse gastrocnemius muscle to gain insight into the mitochondrial biogenesis that occurs during the muscle degeneration/regeneration induced by freezing. In addition, we tested whether the muscle regeneration is affected by pharmacologically blocking the mitochondrial protein synthesis to elucidate the possible involvement of mitochondrial biogenesis in muscle regeneration. The activity of citrate synthase dramatically increased soon after the initial injury when the myoblasts began to differentiate into myotubes, indicating that mitochondrial biogenesis occurs early during the muscle regeneration. At the same time, the expression of mitochondrial biogenesis-related genes including PGC-1β, PRC, NRF-1, NRF-2, TFAM, mtSSB, fission 1, and Lon protease synchronized with that of the myogenic regulatory genes including MyoD and myogenin. The skeletal muscles forced to regenerate in the presence of chloramphenicol to block the mitochondrial protein synthesis were of poor repair with small myofibers and an increased amount of connective tissue. These results suggest that mitochondrial biogenesis activated early during the muscle regeneration and that mitochondrial biogenesis plays a role in muscle regeneration.

Keywords

Mitochondrial biogenesisMuscle regenerationMyogenic differentiation

Copyright information

© Springer Science+Business Media, LLC. 2010