Angiotensin-converting enzyme blockade by Captopril changes angiotensin II receptors and angiotensinogen concentrations in the brain of SHR-sp and WKY rats.

Abstract:

:Angiotensin II-sensitive neurons in the brain of spontaneously hypertensive rats (SHR-sp) and of Wistar Kyoto rats (WKY) treated with the angiotensin-converting enzyme inhibitor Captopril were investigated for possible differences at receptor sites. Furthermore, the concentrations of angiotensinogen and renin were measured in different brain regions of these animals by biochemical assay. The higher receptor sensitivity of septal neurons to angiotensin II which existed in SHR-sp as compared to WKY was diminished by Captopril. Angiotensinogen concentrations were lower in the anterior hypothalamus but not in the septum of SHR-sp as compared to WKY. Captopril increased the level in both strains. Renin concentrations did not differ in SHR-sp and WKY. Chronic treatment with Captopril induced an increase of about 20% in septum and hypothalamic regions of SHR-sp and WKY rats. Whether these changes are causally linked to the hypertension in SHR-sp remains to be investigated.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Felix D,Schelling P

doi

10.1016/0304-3940(82)90090-8

subject

Has Abstract

pub_date

1982-12-23 00:00:00

pages

45-50

issue

1

eissn

0304-3940

issn

1872-7972

pii

0304-3940(82)90090-8

journal_volume

34

pub_type

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