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  • Title: Adrenal renin: a possible local regulator of aldosterone production.
    Author: Mulrow PJ.
    Journal: Yale J Biol Med; 1989; 62(5):503-10. PubMed ID: 2697984.
    Abstract:
    Extrarenal renin has been identified in a number of tissues, including the brain, the submaxillary gland, uterus, ovary, vascular endothelium, testes, pituitary gland, and the adrenal cortex. In some tissues, including the adrenal cortex, all of the components of the renin-angiotensin system have been identified; however, no specific physiologic role has been clearly demonstrated for these extrarenal renin-angiotensin systems. We have studied the role of the renin-angiotensin system in the adrenal cortex of the rat and have found that renin is localized and synthesized in the zona glomerulosa cells. Its production can be influenced by alterations in electrolyte balance, as well as the genetic background of the rat. In adrenal capsular explant cultures, a converting enzyme inhibitor can lower angiotensin II production and reduce the stimulation of aldosterone by potassium, suggesting that this system is involved in the aldosterone response to potassium. In addition to rat adrenals, renin has been identified in human adrenal tissue and human adrenal tumors, including aldosteronomas, and a patient with hypertension has been reported to have an adrenal tumor that appeared to be secreting renin into the circulation.
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