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Am J Physiol Regul Integr Comp Physiol 263: R840-R844, 1992;
0363-6119/92 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 263, Issue 4 840-R844, Copyright © 1992 by American Physiological Society

ARTICLES

Interleukin-1 stimulates aldosterone secretion: involvement of renin, ACTH, and prostaglandins

A. Bataillard, A. del Rey, I. Klusman, G. M. Arditi and H. O. Besedovsky
Department of Physiology and Clinical Pharmacology, Centre National de la Recherche Scientifique, School of Pharmacy, Lyon, France.

Interleukin-1 (IL-1), a cytokine produced during infection and inflammation, mediates some of the endocrinological alterations that parallel these processes. The purpose of this study was to determine whether human recombinant IL-1 (hrIL-1) affects aldosterone output as well as renin and adrenocorticotropic hormone (ACTH) release, two key factors in the regulation of mineralocorticoid secretion. We observed that intravenous administration of hrIL-1 into conscious unrestrained rats elicited a marked and rapid rise in aldosterone plasma levels in a dose-dependent manner. The hrIL-1-induced increase in aldosterone levels was associated with enhanced renin activity and increased ACTH levels in plasma. Furthermore, aldosterone levels of IL-1-injected rats were positively correlated with plasma renin activity (PRA), suggesting that the renin-angiotensin system contributes to the changes observed in the levels of the mineralocorticoid hormone. ACTH seems also to be implicated in the aldosterone response to hrIL-1 because the profile of the kinetic curves of changes in the levels of the pituitary hormone and aldosterone was similar. Pretreatment with the cyclooxygenase inhibitor indomethacin markedly reduced the increase in aldosterone plasma levels and PRA induced by IL-1, indicating that prostaglandins are involved in these effects of the cytokine. These results suggest that IL-1 may play an important role in the control of homeostasis during infectious and inflammatory diseases.


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