Pflügers Archiv - European Journal of Physiology

, Volume 461, Issue 3, pp 325–335

The role and regulation of MAFbx/atrogin-1 and MuRF1 in skeletal muscle atrophy

  • Victoria C. Foletta
  • Lloyd J. White
  • Amy E. Larsen
  • Bertrand Léger
  • Aaron P. Russell
Invited Review

DOI: 10.1007/s00424-010-0919-9

Cite this article as:
Foletta, V.C., White, L.J., Larsen, A.E. et al. Pflugers Arch - Eur J Physiol (2011) 461: 325. doi:10.1007/s00424-010-0919-9

Abstract

Skeletal muscle atrophy occurs in many chronic diseases and disuse conditions. Its severity reduces patient recovery, independence and quality of life. The discovery of two muscle-specific E3 ubiquitin ligases, MAFbx/atrogin-1 and Muscle RING Finger-1 (MuRF1), promoted an expectation of these molecules as targets for therapeutic development. While numerous studies have determined the conditions in which MAFbx/atrogin-1 and MuRF1 mRNA levels are regulated, few studies have investigated their functional role in skeletal muscle. Recently, studies identifying new target substrates for MAFbx/atrogin-1 and MuRF1, outside of their response to the initiation of muscle atrophy, suggest that there is more to these proteins than previously appreciated. This review will highlight our present knowledge of MAFbx/atrogin-1 and MuRF1 in skeletal muscle atrophy, the impact of potential therapeutics and their known regulators and substrates. Finally, we will comment on new approaches that may expand our knowledge of these two molecules in their control of skeletal muscle function.

Keywords

Skeletal muscleRegenerationMuscle damageMyosin heavy chainMyogenic response

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Victoria C. Foletta
    • 1
  • Lloyd J. White
    • 1
  • Amy E. Larsen
    • 1
  • Bertrand Léger
    • 1
  • Aaron P. Russell
    • 1
  1. 1.Centre for Physical Activity and Nutrition Research (C-PAN), School of Exercise and Nutrition SciencesDeakin UniversityBurwoodAustralia