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Differential regulation of renal glomerular and preglomerular vascular angiotensin II receptors.
Am J Physiol. 1996 May; 270(5 Pt 1):E810-5.AJ

Abstract

The activity of the renin-angiotensin system (RAS) can be influenced by sodium intake and angiotensin II (ANG II) infusion. It has been shown that ANG II can regulate the density of its receptors. Therefore, we investigated the regulation of glomerular and preglomerular vascular ANG II receptors by changes in RAS activity. Sprague-Dawley rats were fed a low- or high-sodium diet or were infused with nonpressor or pressor doses of ANG II for 7 days. ANG II receptor characteristics were determined by radioligand binding assays with use of ANG II antagonists losartan and PD-123319. AT1 was the only receptor type found in membrane preparations from all groups. Glomerular ANG II receptor characteristics in all groups were unchanged compared with their controls, whereas vascular receptor density was significantly downregulated by sodium restriction. We conclude that glomerular and preglomerular vascular ANG II receptors are differentially regulated such that AT1 receptors in preglomerular vessels can be regulated by changes in endogenous RAS. ANG II infusion did not induce any modification of either glomerular or vascular AT1 receptors, suggesting a predominant role of the endogenous local renal RAS.

Authors+Show Affiliations

Laboratory of Experimental Hypertension and Vasoactive Peptides, Clinical Research Institute of Montreal, Quebec, Canada.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8967469

Citation

Amiri, F, and R Garcia. "Differential Regulation of Renal Glomerular and Preglomerular Vascular Angiotensin II Receptors." The American Journal of Physiology, vol. 270, no. 5 Pt 1, 1996, pp. E810-5.
Amiri F, Garcia R. Differential regulation of renal glomerular and preglomerular vascular angiotensin II receptors. Am J Physiol. 1996;270(5 Pt 1):E810-5.
Amiri, F., & Garcia, R. (1996). Differential regulation of renal glomerular and preglomerular vascular angiotensin II receptors. The American Journal of Physiology, 270(5 Pt 1), E810-5.
Amiri F, Garcia R. Differential Regulation of Renal Glomerular and Preglomerular Vascular Angiotensin II Receptors. Am J Physiol. 1996;270(5 Pt 1):E810-5. PubMed PMID: 8967469.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential regulation of renal glomerular and preglomerular vascular angiotensin II receptors. AU - Amiri,F, AU - Garcia,R, PY - 1996/5/1/pubmed PY - 1996/5/1/medline PY - 1996/5/1/entrez SP - E810 EP - 5 JF - The American journal of physiology JO - Am. J. Physiol. VL - 270 IS - 5 Pt 1 N2 - The activity of the renin-angiotensin system (RAS) can be influenced by sodium intake and angiotensin II (ANG II) infusion. It has been shown that ANG II can regulate the density of its receptors. Therefore, we investigated the regulation of glomerular and preglomerular vascular ANG II receptors by changes in RAS activity. Sprague-Dawley rats were fed a low- or high-sodium diet or were infused with nonpressor or pressor doses of ANG II for 7 days. ANG II receptor characteristics were determined by radioligand binding assays with use of ANG II antagonists losartan and PD-123319. AT1 was the only receptor type found in membrane preparations from all groups. Glomerular ANG II receptor characteristics in all groups were unchanged compared with their controls, whereas vascular receptor density was significantly downregulated by sodium restriction. We conclude that glomerular and preglomerular vascular ANG II receptors are differentially regulated such that AT1 receptors in preglomerular vessels can be regulated by changes in endogenous RAS. ANG II infusion did not induce any modification of either glomerular or vascular AT1 receptors, suggesting a predominant role of the endogenous local renal RAS. SN - 0002-9513 UR - https://www.unboundmedicine.com/medline/citation/8967469/Differential_regulation_of_renal_glomerular_and_preglomerular_vascular_angiotensin_II_receptors_ L2 - http://www.physiology.org/doi/full/10.1152/ajpendo.1996.270.5.E810?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -