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Protective mechanism of nitric oxide and mucus against ischemia/reperfusion-induced gastric mucosal injury

Authors
 Hyeyoung Kim  ;  Kwangsoo Nam  ;  Kyung Hwan Kim 
Citation
 KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY, Vol.2(4) : 511-519, 1998 
Journal Title
 KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY 
ISSN
 1226-4512 
Issue Date
1998
Abstract
This study investigated the role of nitric oxide on the oxidative damage in gastric mucosa of rats which received ischfmia/reperfusion and its relation to mucus. Nitric oxide synthesis modulators such as L-arginine and NG-nitro-L-arginine methyl ester, and sodium nitroprusside, a nitric oxide donor, were injected intraperitoneally to the rats 30 min prior to ischemia/reperfusion which was induced by clamping the celiac artery and the superior mesenteric artery for 30 min and reperfusion for 1 h. Lipid peroxide production, the contents of glutathione and mucus, and glutathione peroxidase activities of gastric mucosa were determined. Histological observation of gastric mucosa was performed by using hematoxylin-eosin staining and scanning electron microscopy. The result showed that ischemia/reperfusion increased lipid peroxide production and decreased the contents of glutathione and mucus as well as glutathione peroxidase activities of gastric mucosa. Ischemia/reperfusion induced gastric erosion and gross epithelial disruption of gastric mucosa. Pretreatment of L-arginine, a substrate for nitric oxide synthase, and sodium nitroprusside prevented ischemia/reperfusion-induced alterations of gastric mucosa. However, N G -nitro- L-arginine methyl ester, a nitric oxide synthase inhibitor, deteriorated oxidative damage induced by ischemia/reperfusion. In conclusion, nitric oxide has an antioxidant defensive role on gastric mucosa by maintaining mucus, glutathione, and glutathione peroxidase of gastric mucosa.
Files in This Item:
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pharmacology (약리학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Hwan(김경환)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/176515
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