丹皮酚每天腹腔注射60mg/kg，连续15d，每天2次，然后结扎大鼠左降枝冠状动脉45min，解除结扎恢复血流灌注60min，复制大鼠心肌缺血再灌注损伤模型。观察丹皮酚对心肌细胞线粒体膜胆固醇/磷酯的比值、膜Ca⁺⁺－ATP酶活性、膜脂流动性及心肌细胞游离脂肪酸的影响。结果丹皮酚能降低线粒体膜胆固醇/磷脂的比值，减少心肌细胞游离脂肪酸含量，改善Ca⁺⁺－ATP酶活性，改善和调节线粒体膜脂的流动性。表明丹皮酚能明显改善缺血再灌注损伤心肌线粒体膜的结构和功能，与保护心肌细胞膜脂结构有关。

60mg /kg·d ip, of paeonol were given to rats for 15 days. The myocardial ischemia reperfusion injury model was produced by occluding the left coronary artery and releasing the occlusion in rats. This significantly decreased myocardial Ca++-ATPase activitics and CH/PL radical, FFA content, improved mitochondrial membrane fluidity and kept them away from oxygen free radical damage. These results indicated that paeonol has membrane protective effect on myocardial ischemia rcperfusion injury probably by inhibiting the oxygen free radicals and subsequent lipid peroxidation