Journal
JOURNAL OF BURN CARE & REHABILITATION
Volume 21, Issue 6, Pages 528-534Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00004630-200021060-00010
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Burn injuries are associated with muscle cachexia, which mainly reflects protein breakdown in the ubiquitin-proteasome pathway. Ubiquitination of proteins degraded by this mechanism is regulated by multiple enzymes, including the 14-kd ubiquitin-conjugating enzyme, E2(14k). In this study, burn injuries in rats resulted in increased levels of the 1.2 kilobase E2(14k) transcript in the white, fast-twitch extensor digitorum longus muscle with no changes or only minor changes in the red, slow-twitch soleus muscle, liver, and kidney. The results provide the first evidence that burn injuries upregulate the gene expression of E2(14k) in skeletal muscle and suggest that ubiquitin-proteasom-dependent muscle protein breakdown after thermal injuries may, at least in part, be regulated by E2(14k).
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