Effect of dietary-fish-oil feeding on muscle growth and damage in the rat
1988
Jackson, M.J. | Roberts, J. | Edwards, R.H.T.
Giving diets containing 100 g fully-refined, non-hydrogenated fish oil/kg to rats caused substantial modification of skeletal-muscle-membrane fatty acid composition compared with control animals fed on an equivalent diet containing 100 g maize oil/kg. Total muscle arachidonic acid (20:4w6) was reduced from 138 (SD 25) mg/g total fatty acids to 15 (SD 2) mg/g and phospholipid arachidonic acid content showed equivalent changes. Reduction in muscle arachidonic acid content had no influence on the growth of individual muscles. Variation in muscle fatty acid composition exacerbated the response of muscle to calcium-induced damage assessed by efflux of intracellular creatinine kinase (EC 2.7.3.2.). It is concluded that metabolites of arachidonic acid are unlikely to be primary controlling factors of muscle growth or specific mediators of muscle sarcolemmal damage leading to enzyme efflux.
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