Angiotensin AT1 receptor blockers suppress ischemia/reperfusion-induced gastric injury in rats.

Abstract:

:Ischemia/reperfusion (I/R) damages gastric mucosa via reactive oxygen species (ROS) activity. ROS was reportedly produced through angiotensin II stimulation in tissues such as kidney, heart and brain. To determine whether AT1 receptor plays a role in gastric mucosal damage, we examined the effect of AT1 receptor blocker (ARB; losartan, candesartan, valsartan) on I/R-induced gastric injury in rats. I/R produced microscopic gastric hemorrhagic injury, and increased gastric microvascular permeability and H(2)O(2) production in rats. The mucosal lesions induced by I/R were attenuated by pretreatment of each ARB. The increase in microvascular permeability was suppressed by losartan pretreatment. Additionally, I/R-caused H(2)O(2) activation was not observed by pretreatment of losartan, candesartan and valsartan. These results suggest that angiotensin II stimulation via AT1 receptor and following ROS production in the stomach contribute to the pathogenesis of the gastric I/R injury.

journal_name

Inflammopharmacology

journal_title

Inflammopharmacology

authors

Nakagiri A,Sunamoto M,Murakami M

doi

10.1007/s10787-006-1551-3

subject

Has Abstract

pub_date

2007-08-01 00:00:00

pages

171-4

issue

4

eissn

0925-4692

issn

1568-5608

journal_volume

15

pub_type

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