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Advances in Pharmacological Sciences
Volume 2016, Article ID 7294942, 8 pages
http://dx.doi.org/10.1155/2016/7294942
Research Article

Gender Difference in Renal Blood Flow Response to Angiotensin II Administration after Ischemia/Reperfusion in Rats: The Role of AT2 Receptor

1Water and Electrolytes Research Center, Isfahan University of Medical Sciences, Isfahan 81745, Iran
2Department of Physiology, Isfahan University of Medical Sciences, Isfahan 81745, Iran
3Isfahan MN Institute of Basic and Applied Sciences Research, Isfahan 81546, Iran

Received 29 November 2015; Accepted 7 February 2016

Academic Editor: Antonio Ferrer-Montiel

Copyright © 2016 Maryam Maleki and Mehdi Nematbakhsh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. Renal ischemia/reperfusion (I/R) is one of the major causes of kidney failure, and it may interact with renin angiotensin system while angiotensin II (Ang II) type 2 receptor (AT2R) expression is gender dependent. We examined the role of AT2R blockade on vascular response to Ang II after I/R in rats. Methods. Male and female rats were subjected to 30 min renal ischemia followed by reperfusion. Two groups of rats received either vehicle or AT2R antagonist, PD123319. Mean arterial pressure (MAP), and renal blood flow (RBF) responses were assessed during graded Ang II (100, 300, and 1000 ng/kg/min, i.v.) infusion at controlled renal perfusion pressure (RPP). Results. Vehicle or antagonist did not alter MAP, RPP, and RBF levels significantly; however, 30 min after reperfusion, RBF decreased insignificantly in female treated with PD123319 (). Ang II reduced RBF and increased renal vascular resistance (RVR) in a dose-related fashion (), and PD123319 intensified the reduction of RBF response in female (), but not in male rats. Conclusion. The impact of the AT2R on vascular responses to Ang II in renal I/R injury appears to be sexually dimorphic. PD123319 infusion promotes these hemodynamic responses in female more than in male rats.