Abstract:Objective To observe the protective effects of phycocyanin on myocardium in rats with acute myocardial ischemia reperfusion injuries (MIRI), and explore the mechanism. Methods The model of acute myocardial ischemia reperfusion injury was established by ligating the left anterior descending coronary artery of 48 SPF SD rats with 30 min after reperfusion, then they were divided into 3 groups: model control group, phycocyanin group A and group B, another 8 rats were selected as normal control group. Rats in phycocyanin group A and group B were treated with phycocyanin by intragastric administration [100, 400 mg/(kg·d)] for 10 d, rats in model control group and normal control group were treated with the same does of 0.9% sodium chloride solution by intragastric administration. The activity of T-SOD and GSH-PX were detected in the tail venous blood, the content of MDA in myocardium was detected, the expression of iNOS in cardiac myocytes was detected by immunohistochemistry. The expression of cyclin dependent kinase inhibitor P21 and P27 in coronary artery was detected by image analysis. Results Compared with model control group and after modelling, the activity of T-SOD and GSH-PX in group A and group B improved significantly, the content of MDA reduced significantly, the expression of cyclin dependent kinase inhibitor P21 and P27 in coronary artery improved significantly, the expression of iNOS in cardiac myocytes reduced significantly, the differences were statistically significant (P < 0.05). Phycocyanin group A were compared with Phycocyanin group B, the differences were not statistically significant (P > 0.05). Conclusion Phycocyanin can protect myocardium with MIRI by promoting P21 and P27 gene expression, improving T-SOD and GSH-PX enzyme activity, controlling iNOS and lipid peroxidation of ischemic myocardium and reducing the myocardial cell pathological vascular remodeling.
曹觅 许丽琴 刘清忠 齐旭升. 藻蓝蛋白对大鼠急性心肌缺血再灌注损伤的保护作用[J]. 中国医药导报, 2017, 14(14): 25-28.
CAO Mi XU Liqin LIU Qingzhong QI Xushen. Protective effects of phycocyanin on myocardium in rats with acute myocardial ischemia reperfusion injuries. 中国医药导报, 2017, 14(14): 25-28.