Regulation of renin secretion by angiotensin II-AT1 receptors.

Angiotensin II (AngII) resulting as the end product of a proteolytic cascade initiated by renin inhibits the secretion of renin in the sense of a negative feedback. A direct effect of AngII on renal juxtaglomerular epithelioid cells as the main source of renin secretion is mediated via AngII-AT1 receptors and involves calcium-dependent reactions. These reactions may comprise activation of protein kinase C and activation of chloride channels.