The effect of calcitonin (CT) on free fatty acid concentration in the serum and liver
of fed rats was investigated. A single subcutaneous administration of CT (synthetic
[Asu1,7] eel CT; 80 MRC mU/100 g body weight) produced a significant increase in serum free
fatty acid concentration. An appreciable effect of CT was observed at a dose of 5
MRC mU/100 g body weight. The hormonal effect was also observed in thyroparathyroidectomized
rats. The effect of CT on serum free fatty acid was diminished by fasting. Free fatty
acid content in the hepatic cytosol of fed rats was markedly increased by CT administration.
The hormonal effect was observed at a dose of 5 MRC mU/100 g body weight. Furthermore,
stimulation of fatty acid synthesis caused by intraperitoneal injection of alanine
(1.122 mmoles/100 g body weight) was markedly enhanced by administration of CT (5,
20 and 80 MRC mU/100 g body weight). This effect of CT on the liver may be the cause
of increased level of fatty acid in the serum. The present results suggest that CT
may stimulate synthesis of free fatty acid in the liver of fed rats.
Calcitonin
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Fatty Acid Synthesis
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Rat Liver
