Prostaglandins: Renin Release and Renal Function1

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Abstract
Renal prostaglandins have several potential functions in renal physiology. Perhaps their best documented role is the maintenance of renal blood flow during renal ischemia, although they are apparently not essential to blood flow autoregulation in the absence of ischemia. Alterations in sodium excretion parallel the hemodynamic changes induced by prostaglandin infusions and prostaglandin inhibition with indomethacin. A direct action on sodium balance is unproven. Numerous studies, in vivo and in vitro, have convincingly demonstrated that prostaglandins or their precursors stimulate renin release and prostaglandin inhibition blunts renin release independent of hemodynamic and electrolyte balance. These functions of prostaglandins have implicated them in the manifestations of Bartter's syndrome, the nephropathy of liver cirrhosis, renovascular hypertension, and other nephropathies.

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