环维黄杨星D对培养大鼠乳鼠心肌细胞缺氧/复氧损伤的保护作用

目的研究环维黄杨星D对纯化培养大鼠乳鼠心肌细胞缺氧/复氧损伤的保护作用及机制。方法采用纯化培养的心肌细胞建立缺氧/复氧损伤模型,测定细胞凋亡率、caspase-3、超氧化物歧化酶(SOD)、丙二醛(MDA)和乳酸脱氢酶(LDH)含量。结果与正常组比较,模型组LDH、MDA含量、caspase-3活性及细胞凋亡率明显增高(P<0.01),SOD活性明显降低(P<0.01);CVB-D(1×10-5mol.L-1)组降低LDH、MDA含量、caspase-3活性和细胞凋亡率,提高SOD活性,与缺氧/复氧组比较各实验指标均差异具有显著性(P<0.05)。结论CVB-D对缺氧/复氧造成的心肌细胞损伤具有保护作用,作用机制与清除氧自由基,抗脂质过氧化及降低细胞凋亡率有关。

Protective effects of Cyclovirobuxine D on neonatal rat cardiomyocytes exposed to hypoxia-reoxygenation injury

Aim To investigate the cardioprotective effects of Cyclovirobuxine D on pure cultared neonatal rat cardiomyoeytes exposed to hypoxia-reoxygenation (H/R) injury and the mechanisms. Methods The hypoxia/reoxygenation(H/R) injury model of pure cultured neonatal rat cardiomyocytes was developed.The concentration of lactate dehydrogenase (LDH) and malonialdehvde (MDA), the activity of super-oxide dismutes (SOD) and caspase-3, the apoptosis rate of cardiomyocyte were measured.Results Compared with the control group, the model group showed lower activity of SOD and higher concentrations of LDH , MDA, the apoptosis rate and activity of caspase-3(P<0.01).After treated with CVB-D(1×10-5 mol·L-1), the activity of SOD was significantly increased but the concentration of LDH and MDA, the activity of caspase-3 and the apoptosis rate were decreased(P<0.05).Conclusions CVB-D could protect cardiomyocytes against H/R injury. The cardioprotective mechanism maybe related to the reduction of apoptosis rate and lipid peroxidation.