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31 January 2017 : Original article  

Comparative Analysis of Renin-Angiotensin System (RAS)-Related Gene Expression Between Hypertensive and Normotensive Rats

Chad R. Williamson1ABCDEF, Sandhya Khurana2ACDEF, Phong Nguyen1ABE, Collin J. Byrne1CD, T.C. Tai1234ACDEFG*

DOI: 10.12659/MSMBR.901964

Med Sci Monit Basic Res 2017; 23:20-24

Abstract

BACKGROUND: The renal renin-angiotensin system (RAS) is physiologically important for blood pressure regulation. Altered regulation of RAS-related genes has been observed in an animal model of hypertension (spontaneously hypertensive rats – SHRs). The current understanding of certain RAS-related gene expression differences between Wistar-Kyoto rats (WKYs) and SHRs is either limited or has not been compared. The purpose of this study was to compare the regulation of key RAS-related genes in the kidneys of adult WKYs and SHRs.

MATERIAL AND METHODS: Coronal sections were dissected through the hilus of kidneys from 16-week-old male WKYs and SHRs. RT-PCR analysis was performed for Ace, Ace2, Agt, Agtr1a, Agtr1b, Agtr2, Atp6ap2 (PRR), Mas1, Ren, Rnls, and Slc12a3 (NCC).

RESULTS: Increased mRNA expression was observed for Ace, Ace2, Agt, Agtr1a, Agtr1b, and Atp6ap2 in SHRs compared to WKYs. Mas1, Ren, Slc12a3, and Rnls showed no difference in expression between animal types.

CONCLUSIONS: This study shows that the upregulation of several key RAS-related genes in the kidney may account for the increased blood pressure of adult SHRs.

Keywords: Kidney, Rats, Inbred SHR, Rats, Inbred WKY, Receptor, Angiotensin, Type 1, Receptor, Angiotensin, Type 2, Renin-Angiotensin System

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Medical Science Monitor Basic Research eISSN: 2325-4416
Medical Science Monitor Basic Research eISSN: 2325-4416