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Am J Physiol Endocrinol Metab 238: E416-E420, 1980;
0193-1849/80 $5.00
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AJP - Endocrinology and Metabolism, Vol 238, Issue 5 416-E420, Copyright © 1980 by American Physiological Society

ARTICLES

Effect of adrenergic agonists on big and small renin

H. Iwao, C. S. Lin and A. M. Michelakis

The effect of alpha- and beta-adrenergic agonists on renal and submaxillary renin of different molecular weights was studied using male albino mice as experimental animals. Phenylephrine or isoproterenol was administered intravenously after removal of the submaxillary glands and/or kidneys. Renin was isolated from plasma by column chromatography and then measured by a direct radioimmunoassay. Phenylephrine increased both 68,500-dalton renin (big renin) and 38,000-dalton renin (small renin) in the plasma of nephrectomized mice. Isoproterenol increased big and small renin in the plasma of mice whose submaxillary glands were removed. In both cases, the increase of small renin was significantly greater than that of big renin. The results suggest that the alpha-adrenergic agonist phenylephrine affects the submaxillary gland, leading to the increase of both big and small plasma renin. In contrast, the beta-adrenergic agonist isoproterenol affects the kidney, leading to the increase of both big and small plasma renin.


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