Mitochondrial biogenesis during skeletal muscle regeneration

Stéphanie Duguez, Léonard Féasson, Christian Denis, Damien Freyssenet

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

Myogenesis requires energy production for the execution of a number of regulatory and biosynthesis events. We hypothesized that mitochondrial biogenesis would be stimulated during skeletal muscle regeneration. Tibialis anterior muscles of male Sprague-Dawley rats were injected with 0.75% bupivacaine and removed at 3, 5, 7, 10, 14, 21, or 35 days after injection (n = 5-7/group). Two main periods emerged from the histochemical analyses of muscle sections and the expression of proliferating cell nuclear antigen, desmin, and creatine phosphokinase: 1) activation/proliferation of satellite cells (days 3-14) and 2) differentiation into muscle fibers (days 5-35). The onset of muscle differentiation was accompanied by a marked stimulation of mitochondrial biogenesis, as indicated by a nearly fivefold increase in citrate synthase activity and state 3 rate of respiration between days 5 and 10. Peroxisome proliferator-activated receptor-γ coactivator-1 (PGC-1) mRNA level and mitochondrial transcription factor A (mtTFA) protein level peaked on day 10 concurrently with the state 3 rate of respiration. Therefore, transcriptional activation by PGC-1 and mtTFA may be one of the mechanisms regulating mitochondrial biogenesis in regenerating skeletal muscle. Taken together, our results suggest that mitochondrial biogenesis may be an important regulatory event during muscle regeneration.

Original languageEnglish
Pages (from-to)E802-E809
JournalAmerican Journal of Physiology - Endocrinology and Metabolism
Volume282
Issue number4 45-4
DOIs
Publication statusPublished - 2002

Keywords

  • Mitochondrial respiration
  • Mitochondrial transcription factor A
  • Muscle precursor cells
  • Myogenesis
  • Peroxisome proliferator-activated receptor-γ coactivator-1

Fingerprint

Dive into the research topics of 'Mitochondrial biogenesis during skeletal muscle regeneration'. Together they form a unique fingerprint.

Cite this