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氧化应激标志物在房颤患者心房结构重构中的变化及意义

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Keywords: 房颤,心房重构,氧化应激,NADPH氧化酶,晚期氧化蛋白产物

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Abstract:

目的通过分析多种氧化应激标志物在血清及组织中的动态变化,观察其在心房结构重构中的表达,探讨房颤(atrialfibrillation,AF)的发生机制。方法选择我中心44例2014年2-5月行单纯二尖瓣置换手术的风湿性心脏病患者,根据病史及术前动态心电图记录分为2组:持续性房颤(AF)组26例,窦性心律(SR)组18例。术中取部分右心耳组织,行Masson染色观察纤维化情况,采用免疫组化、免疫荧光染色法观察右心耳组织NOX2蛋白表达,用ELISA法测定右心耳组织中丙二醛(malondialdehyde,MDA)、超氧化物歧化酶(superoxidedismutase,SOD)、活性氧(reactiveoxygenspecies,ROS)、晚期氧化蛋白产物(advancedoxidativeproteinproducts,AOPP)浓度以及血清中ROS、AOPP含量。结果AF组心房组织中MDA[(15.41±1.69)μmol/mg]、SOD[(13.32±1.25)μmol/mg]、ROS[(18.53±3.47)μmol/mg]、AOPP[(29.69±2.09)μmol/mg]含量与SR组MDA[(11.46±1.83)μmol/mg]、SOD[(10.65±1.15)μmol/mg]、ROS[(13.65±3.29)μmol/mg]、AOPP[(21.94±1.94)μmol/mg]比较差异有统计学意义(P<0.05),AF组血清中ROS含量[(34.6±2.61)μmol/L]明显高于SR组[(17.8±1.03)μmol/L],2组患者血清中AOPP含量差异无统计学意义(P>0.05)。与SR组相比,AF组右心耳组织胶原纤维增生明显,NOX2蛋白表达呈强阳性。结论房颤时发生以间质纤维化改变的心房结构重构,氧化应激参与了房颤发生和结构重构过程。

References

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