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Fisetin reduces MMP-9 expression in ischemic myocardium. (A) Representative photomicrographs of rat ischemic myocardium stained for MMP-9 (brown; magnification, x400). (B) Quantification of MMP-positive staining. The expression of MMP-9 was markedly inhibited in fisetin-pretreated groups (15 and 45 mg/kg). **P<0.01 vs. model group. MMP, matrix metalloproteinase.
