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Effects of vasopressin and prostaglandin E1 on the adenyl cyclase—cyclic 3′,5′-adenosine monophosphate system of the renal medulla of the rat
Nama P. Beck, … , James B. Field, Bernard B. Davis
Nama P. Beck, … , James B. Field, Bernard B. Davis
Published December 1, 1971
Citation Information: J Clin Invest. 1971;50(12):2461-2465. https://doi.org/10.1172/JCI106746.
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Research Article

Effects of vasopressin and prostaglandin E1 on the adenyl cyclase—cyclic 3′,5′-adenosine monophosphate system of the renal medulla of the rat

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Abstract

Vasopressin increased adenyl cyclase activity in homogenates of both inner and outer renal medulla of the rat. It also increased the concentration of cyclic 3′,5′-adenosine monophosphate (AMP) in slices of both inner and outer medulla but not in renal cortex. In the inner medulla, a concentration of prostaglandin E1 (PGE1), which was ineffective by itself significantly reduced the stimulation of adenyl cyclase activity and cyclic AMP concentration induced by vasopressin. These results are consistent with the hypothesis that PGE1 can compete with vasopressin for adenyl cyclase-binding sites. However, the findings in the outer medulla suggest the situation is more complex. Although 10-8 M PGE1 had no effect by itself and inhibited the vasopressin-induced elevation of cyclic AMP, larger amounts of PGE1 increased both adenyl cyclase activity and cyclic AMP levels. The maximum effect on the latter parameter was at least 6 times as great as that of maximum amounts of vasopressin.

Authors

Nama P. Beck, Toshio Kaneko, Uriel Zor, James B. Field, Bernard B. Davis

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