Vitamin E in gastric mucosal injury induced by ischemia-reperfusion.
To clarify the relationship among vitamin E, oxygen radicals, and lipid peroxidation in ischemia-reperfusion, we produced an experimental model of gastric mucosal injury in rats by ischemia-reperfusion with clamping of the celiac artery and measurements of the area of gastric erosion, thiobarbituric acid (TBA)-reactive substances, and alpha-tocopherol in serum and gastric mucosa during ischemia-reperfusion. The area of gastric erosions and TBA-reactive substances in gastric mucosa were significantly increased after 30 and 60 min of reperfusion. The serum alpha-tocopherol-cholesterol ratio and gastric mucosal alpha-tocopherol were significantly decreased after 30 and 60 min of reperfusion. On the other hand, in vitamin E-deficient rats, gastric mucosal injury induced by ischemia-reperfusion was more severe than that in vitamin E-nondeficient rats. These results indicate that vitamin E is consumed in the process of lipid peroxidation induced by oxygen radicals in ischemia-reperfusion to prevent the development of tissue damage.
Yoshikawa
T
T
First Department of Medicine, Kyoto Prefectural University Medicine, Japan.
Yasuda
M
M
Ueda
S
S
Naito
Y
Y
Tanigawa
T
T
Oyamada
H
H
Kondo
M
M
D000818:Animals; D002784:Cholesterol / Q000097:blood; D005753:Gastric Mucosa / Q000098:blood supply / Q000737:chemistry / Q000378:metabolism* / Q000473:pathology; D007511:Ischemia; D015227:Lipid Peroxidation; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D015427:Reperfusion Injury / Q000378:metabolism* / Q000473:pathology; D014810:Vitamin E / Q000032:analysis / Q000097:blood / Q000378:metabolism*; D014811:Vitamin E Deficiency / Q000378:metabolism* / Q000473:pathology
D014810:Vitamin E; D002784:Cholesterol