Table of Contents Author Guidelines Submit a Manuscript
Advances in Pharmacological Sciences
Volume 2015, Article ID 801053, 9 pages
http://dx.doi.org/10.1155/2015/801053
Research Article

Role of Mas Receptor Antagonist A799 in Renal Blood Flow Response to Ang 1-7 after Bradykinin Administration in Ovariectomized Estradiol-Treated Rats

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

Received 31 May 2015; Revised 11 August 2015; Accepted 12 August 2015

Academic Editor: Thérèse Di Paolo-Chênevert

Copyright © 2015 Aghdas Dehghani et al. 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. The accompanied role of Mas receptor (MasR), bradykinin (BK), and female sex hormone on renal blood flow (RBF) response to angiotensin 1-7 is not well defined. We investigated the role of MasR antagonist (A779) and BK on RBF response to Ang 1-7 infusion in ovariectomized estradiol-treated rats. Methods. Ovariectomized Wistar rats received estradiol (OVE) or vehicle (OV) for two weeks. Catheterized animals were subjected to BK and A799 infusion and mean arterial pressure (MAP), RBF, and renal vascular resistance (RVR) responses to Ang 1-7 (0, 100, and 300 ng kg−1 min−1) were determined. Results. Percentage change of RBF (%RBF) in response to Ang1-7 infusion increased in a dose-dependent manner. In the presence of BK, when MasR was not blocked, %RBF response to Ang 1-7 in OVE group was greater than OV group significantly (). Infusion of 300 ng kg−1 min−1 Ang 1-7 increased RBF by % in OVE group versus % in OV group. However when MasR was blocked, %RBF response to Ang 1-7 in OV group was greater than OVE group insignificantly. Conclusion. Coadministration of BK and A779 compared to BK alone increased RBF response to Ang 1-7 in vehicle treated rats. Such observation was not seen in estradiol treated rats.