Abstract
Glutathione (GSH) is an important intracellular defense against reactive oxgen metabolites. Reaction of GSH with peroxides generates oxidized glutathione (GSSG). We hypothesized that reperfusion would cause oxidation of GSH and release of GSSG as a potential marker of intracellular oxidative reactions. Ten dogs underwent 90 min left anterior descending (LAD) occlusion and 30 min reperfusion. Coronary sinus (CS) plasma was sampled from the great cardiac vein, which drains the LAD region, and from the aorta at pre-ischemia (I), 90 min ischemia, and during reperfusion (R). We found that both GSSG and GSH increased in coronary sinus plasma during early reperfusion.
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