Disuse-induced muscle wasting

Sue C. Bodine

Research output: Contribution to journalArticle

154 Scopus citations

Abstract

Loss of skeletal muscle mass occurs frequently in clinical settings in response to joint immobilization and bed rest, and is induced by a combination of unloading and inactivity. Disuse-induced atrophy will likely affect every person in his or her lifetime, and can be debilitating especially in the elderly. Currently there are no good therapies to treat disuse-induced muscle atrophy, in part, due to a lack of understanding of the cellular and molecular mechanisms responsible for the induction and maintenance of muscle atrophy. Our current understanding of disuse atrophy comes from the investigation of a variety of models (joint immobilization, hindlimb unloading, bed rest, spinal cord injury) in both animals and humans. Under conditions of unloading, it is widely accepted that there is a decrease in protein synthesis, however, the role of protein degradation, especially in humans, is debated. This review will examine the current understanding of the molecular and cellular mechanisms regulating muscle loss under disuse conditions, discussing the similarities and areas of dispute between the animal and human literature. This article is part of a Directed Issue entitled: Molecular basis of muscle wasting.

Original languageEnglish (US)
Pages (from-to)2200-2208
Number of pages9
JournalInternational Journal of Biochemistry and Cell Biology
Volume45
Issue number10
DOIs
StatePublished - 2013

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Keywords

  • Protein degradation
  • Protein synthesis
  • Reloading
  • Ubiquitin ligases
  • Unloading

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology

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