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  • Title: The effects of sarcolipin over-expression in mouse skeletal muscle on metabolic activity.
    Author: Butler J, Smyth N, Broadbridge R, Council CE, Lee AG, Stocker CJ, Hislop DC, Arch JR, Cawthorne MA, Malcolm East J.
    Journal: Arch Biochem Biophys; 2015 Mar 01; 569():26-31. PubMed ID: 25660043.
    Abstract:
    Studies in sarcolipin knockout mice have led to the suggestion that skeletal muscle sarcolipin plays a role in thermogenesis. The mechanism proposed is uncoupling of the sarcoplasmic reticulum calcium pump. However, in other work sarcolipin was not detected in mouse skeletal tissue. We have therefore measured sarcolipin levels in mouse skeletal muscle using semi-quantitative western blotting and synthetic mouse sarcolipin. Sarcolipin levels were so low that it is unlikely that knocking out sarcolipin would have a measurable effect on thermogenesis by SERCA. In addition, overexpression of neither wild type nor FLAG-tagged variants of mouse sarcolipin in transgenic mice had any major significant effects on body mass, energy expenditure, even when mice were fed on a high fat diet.
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