The effects of corticosterone and ACTH(1-24) on lipoprotein lipase (LPL) activity of rat epididymal fat tissue were studied. Hypercorticism induced by s.c. administration of 10 mg corticosterone acetate for 3 days led to a decrease in LPL activity. This decrease could be prevented by treatment of the rats simultaneously with synthetic ACTH(1-24). Adrenalectomy also reduced LPL activity. Corticosterone and ACTH(1-24) treatment had a similar effect on LPL activity in adrenalectomized and intact rats. These results indicate that ACTH(1-24) may affect adipose tissue LPL in the rat by a mechanism in which corticosterone is not involved.
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