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Abstract
The role of platelet-activating factor (PAF) in the induction of rat gastric mucosal damage by ischemia-reperfusion was examined with reference to hemodynamic characteristics. Gastric mucosal hemodynamics was measured continuously, using laser-Doppler flowmetry and reflectance spectrophotometry. Not only gastric mucosal damage but also characteristic hemodynamic change—that is, ischemia with congestion—was observed in the PAF infusion and reperfusion periods of the ischemia-reperfusion model. CV-6209, a specific PAF antagonist, significantly alleviated gastric mucosal damage and hemodynamic disturbance induced by ischemia-reperfusion. These results strongly suggest that PAF is a potent mediator of gastric mucosal damage during reperfusion in the ischemia-reperfusion model.