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Title: Angiotensin II receptors in the kidney. Localization and physiological significance.
Austin Authors: Yamada, H;Sexton, P M;Chai, Syn Y;Adam, W R;Mendelsohn, Frederick AO
Affiliation: Department of Medicine, Austin Hospital, Heidelberg, Victoria.
Issue Date: 1-Mar-1990
Publication information: American Journal of Hypertension; 3(3): 250-5
Abstract: Angiotensin II (Ang II) exerts a variety of actions through specific receptor binding in the kidney. These include modulation of renal hemodynamics, glomerular filtration rate (GFR), and tubular reabsorption. Quantitative in vitro autoradiography was used to localize the Ang II receptors and angiotensin converting enzyme (ACE) in rat, rabbit, and human kidney. We incubated 20 microns cryostat sections of kidney with either 125I-[Sar1]Ang II or 125I-[Sar1,Ile8]Ang II for Ang II binding or with 125I-351A for ACE localization. The resulting autoradiographs were analyzed by computerized densitometry. A high density of Ang II binding was found over glomeruli and vasa recta bundles in all species examined. The interbundle area of the outer medulla was associated with low to moderate binding of Ang II. Moderate binding of Ang II was observed over proximal convoluted tubules in the outer cortex of rat kidney. ACE was predominantly distributed in proximal convoluted tubules in all species. These studies reveal multiple sites where Ang II could modulate renal function by acting on the renal vasculature, glomeruli, vasa recta bundles, and proximal tubular sites.
Gov't Doc #: 2157468
Type: Journal Article
Subjects: Angiotensin II.pharmacology.physiology
Atrial Natriuretic Factor.physiology
Glomerular Filtration Rate.drug effects
Peptidyl-Dipeptidase A.pharmacology
Receptors, Angiotensin.physiology
Renal Circulation.drug effects
Appears in Collections:Journal articles

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