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JCI table of contents: Nov. 8, 2007
Date:11/8/2007

EDITOR'S PICK: Atrogin breaks down the side effects of statins

Statins are a popular class of drugs used to successfully combat high cholesterol. However, the rare, but serious, and poorly understood side effect of skeletal muscle breakdown (a process known as atrophy) prevents more prevalent use of these drugs. New insight into the mechanism of statin-induced skeletal muscle atrophy has been provided by reserachers at Beth Israel Deaconess Medical Center, Boston.

In this study, the authors focused on the activity of atrogin-1, a gene highly associated with skeletal muscle atrophy. Following treatment with lovastatin, a commonly prescribed statin, atrogin-1 was induced in cultured mouse muscle cells and in zebrafish embryos. Furthermore, statin-induced muscle injury in the zebrafish was prevented by reducing the amount of atrogin-1 expressed. Finally, when the protein PGC-1a (which protects against skeletal muscle damage and atrophy) was expressed in zebrafish, both atrogin-1 expression and lovastatin-induced muscle damage were prevented. These data led the authors to conclude that atrogin-1 is a critical mediator of statin-induced muscle damage and that inhibiting atrogin-1 function might protect against this unwanted side effect of statins.

TITLE: The muscle-specific ubiquitin ligase atrogin-1/MAFbx mediates statin-induced muscle toxicity

AUTHOR CONTACT:
Stewart H. Lecker,
Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
Phone: (617) 667-2147; Fax: (617) 667-5276; E-mail: slecker@bidmc.harvard.edu

Vikas P. Sukhatme
Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
Phone: (617) 667-2147; Fax: (617) 667-5276; E-mail: vsukhatm@bidmc.harvard.edu

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Journal of Clinical Investigation
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