Protective effects of L-arginine on rat terminal ileum subjected to ischemia/reperfusion.

Abstract:

OBJECTIVES:Studies have shown that nitric oxide (NO) may play a major role in sustaining mucosal integrity; however, NO has been also implicated in the pathogenesis of ischemia/reperfusion (I/R)-related tissue injury. We investigated the effects of L-arginine and NG-nitro L-arginine methyl ester (L-NAME) on the acetylcholine-induced contractile response of ileum and the levels of malondialdehyde (MDA) and reduced glutathione (GSH). Histopathological changes were also evaluated in ileal preparations. MATERIALS AND METHODS:Male Wistar Albino rats were subjected to mesenteric ischemia (30 min) followed by reperfusion (3 hours). Four groups were designed: sham-operated control; I/R; I/R and L-arginine pretreatment; and I/R and L-NAME pretreatment. After reperfusion, ileum specimens were collected to determine the parameters mentioned above. RESULTS:Following reperfusion, a significant decrease in acetylcholine-induced contractile response, an increase in lipid peroxidation, a decrease in GSH content, and mucosal damage of the ileal preparations were observed. We showed that decreased contractility, increased lipid peroxidation, and reduced GSH content have been reversed by L-arginine but not by L-NAME. Mucosal injury was significantly lowered in the L-arginine group. CONCLUSIONS:Treatment with L-arginine exerted a protective effect in intestinal I/R injury, which was mediated in part by regulating MDA and GSH levels, consequently ameliorating impaired contractile response and mucosal injury.

authors

Sayan H,Ozacmak VH,Altaner S,Aktas RG,Arslan SO

doi

10.1097/01.mpg.0000304450.54057.96

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

29-35

issue

1

eissn

0277-2116

issn

1536-4801

pii

00005176-200801000-00007

journal_volume

46

pub_type

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