Increased lipoprotein lipase activity of skeletal muscle in cold-acclimated rats

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Abstract
The activity of lipoprotein lipase (LPL) in the heart, diaphragm and soleus muscles was markedly increased in cold-acclimated rats and it was even greater in rats treated with oxytetracycline (OTC) while exposed to cold. Other skeletal muscles studied had low and variable activities which were not significantly increased by cold acclimation or by cold plus OTC treatment. It appears therefore that, apart from the heart and the muscles involved in respiratory movements, LPL activity is primarily associated with those muscles which contain a predominance of slow-twitch oxidative fibers, and that the enzyme in muscle, heart and diaphragm responds to cold acclimation and cold plus OTC treatment in a parallel fashion in these tissues.

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