Renin and angiotensin II receptor gene expression in kidneys of renal hypertensive rats.

Details

Serval ID
serval:BIB_5FDE68A0FCD5
Type
Article: article from journal or magazin.
Collection
Publications
Title
Renin and angiotensin II receptor gene expression in kidneys of renal hypertensive rats.
Journal
Hypertension
Author(s)
Haefliger J.A., Bergonzelli G., Waeber G., Aubert J.F., Nussberger J., Gavras H., Nicod P., Waeber B.
ISSN
0194-911X
Publication state
Published
Issued date
1995
Peer-reviewed
Oui
Volume
26
Number
5
Pages
733-7
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Abstract
The aim of this investigation was to examine the interrelation between renal mRNA levels of renin and angiotensin II receptor type 1 (AT1) in a renin-dependent form of experimental hypertension. Rats were studied 4 weeks after unilateral renal artery clipping. Mean blood pressure and plasma renin activity were significantly higher in the hypertensive rats (n = 10 206 +/- mm Hg and 72.4 +/- 20.9 ng/mL-1/h-1, respectively) than in sham-operated controls (n = 10, 136 +/- 3 mm Hg and 3.3 +/- 0.5 ng/mL-1/h, respectively). Northern blot analysis of polyA+ RNA obtained from the kidneys of renal hypertensive rats showed increased levels of renin mRNA in the clipped kidney, whereas a decrease was observed in the unclipped kidney. Plasma renin activity was directly correlated with renin mRNA expression of the poststenotic kidney (r = .94, P < .01). AT1 mRNA expression was lower in both kidneys of the hypertensive rats. This downregulation was specific for the AT1A subtype since the renal expression of the AT1B subtype remained normal in hypertensive rats. The downregulation of the renal AT1A receptor may be due to high circulating angiotensin II levels. This is supported by the significant inverse correlation (r = .71, P < .01) between plasma renin activity and AT1A mRNA expression measured in the clipped kidney of the hypertensive rats.
Keywords
Animals, Down-Regulation, Hypertension, Renovascular, Kidney, Male, RNA, Messenger, Rats, Rats, Wistar, Receptors, Angiotensin, Renin
Pubmed
Web of science
Create date
05/03/2008 17:41
Last modification date
20/08/2019 15:17
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