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  • Title: Effects of antioxidative agents on apoptosis induced by ischaemia-reperfusion in rat intestinal mucosa.
    Author: Kojima M, Iwakiri R, Wu B, Fujise T, Watanabe K, Lin T, Amemori S, Sakata H, Shimoda R, Oguzu T, Ootani A, Tsunada S, Fujimoto K.
    Journal: Aliment Pharmacol Ther; 2003 Jul; 18 Suppl 1():139-45. PubMed ID: 12925152.
    Abstract:
    BACKGROUND AND AIM: We have previously demonstrated that ischaemia-reperfusion induces apoptosis in the intestinal mucosa. To evaluate that reactive oxygen species enhanced intestinal apoptosis after ischaemia-reperfusion, we examined whether antioxidants reduced apoptosis. METHODS: Rats were infused through a duodenal tube with antioxidative agents, glutathione, rebamipide and dymethylsulfoxide during 2 h before an ischaemic insult. The superior mesenteric artery was occluded for 60 min, followed by 60 min reperfusion. Apoptosis was evaluated by percentage fragmented DNA (fragmented DNA/total DNA) and immunochemical staining. RESULTS: Increase in apoptosis in the intestinal mucosa after ischaemia-reperfusion was attenuated by intraduodenal infusion of antioxidative agents, but was not completely abolished. CONCLUSION: Scavenging effects of the antioxidative agents attenuated increases in intestinal apoptosis, indicating that oxidative stress after ischaemia-reperfusion plays an important role in induction of apoptosis in the intestinal mucosa.
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