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Science. 2001 Nov 23;294(5547):1704-8. Epub 2001 Oct 25.

Identification of ubiquitin ligases required for skeletal muscle atrophy.

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  • 1Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY, 10591-6707, USA.

Abstract

Skeletal muscle adapts to decreases in activity and load by undergoing atrophy. To identify candidate molecular mediators of muscle atrophy, we performed transcript profiling. Although many genes were up-regulated in a single rat model of atrophy, only a small subset was universal in all atrophy models. Two of these genes encode ubiquitin ligases: Muscle RING Finger 1 (MuRF1), and a gene we designate Muscle Atrophy F-box (MAFbx), the latter being a member of the SCF family of E3 ubiquitin ligases. Overexpression of MAFbx in myotubes produced atrophy, whereas mice deficient in either MAFbx or MuRF1 were found to be resistant to atrophy. These proteins are potential drug targets for the treatment of muscle atrophy.

PMID:
11679633
[PubMed - indexed for MEDLINE]
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