肢体远隔缺血适应对急性ST段抬高型心肌梗死直接经皮冠状动脉介入治疗患者循环血微小核糖核酸-208b水平及术后心功能影响

刘灿章; 谢莲娜; 郎明非; 曾凯东; 蒋梦; 王丽君; 解泽宙; 魏显敬; 王凯君

摘要

目的:探讨肢体远隔缺血适应(RIC)对急性ST段抬高型心肌梗死(STEMI)直接经皮冠状动脉介入治疗(PCI)成功患者循环血微小核糖核酸－208b(miR-208b) 表达量的影响.方法:入选2016-01至2017-07在大连大学附属中山医院循环四科连续入院接受直接PCI术的STEMI患者75例,每组患者根据不同梗死部位按入院顺序2:1比例分为肢体RIC组50例(前壁20例、非前壁30例)及对照组25例(前壁10例、非前壁15例).术前、术后即刻、术后24 h和术后48 h血清以实时荧光定量聚合酶链式反应(RT-qPCR)检测血清miR-208b的表达量.结果:(1)对照组患者循环血miR-208b表达量术后即刻较术前明显升高 (84.1±9.0 vs 77.8±9.4;P=0.032).(2)肢体RIC组循环血miR-208b表达量术后即刻较术前明显降低(71.0±9.3 vs 77.4±8.8;P=0.028).(3)肢体RIC组术前循环血miR-208b表达量与对照组比较无明显差异(77.8±9.4 vs 77.4±8.8;P=0.874),术后即刻肢体RIC组低于对照组(71.0±9.3 vs 84.1±9.0;P=0.021).(4)肢体RIC组肌酸激酶同工酶(CK-MB)峰值低于对照组[(135.2±18.6) U/L vs(167.7±17.2)U/L;P=0.038].肢体RIC组CK-MB曲线下面积(AUC)小于对照组[(3 060.7±17.1)U/L vs(3 635.9±15.1) U/L;P=0.047].(5)住院期间肢体RIC组左心室射血分数(LVEF)高于对照组[(57.8±7.8)% vs (51.9±7.9)%;P=0.003].(6)肢体RIC组患者术后血清miR-208b的表达量与CK-MB AUC 呈正相关(r=0.498, P<0.001).结论:肢体RIC降低STEMI直接PCI术患者循环血miR-208b水平,并可以改善术后心功能.%Objectives: To investigate whether remote ischemic conditioning (RIC) applied to patients with ST-segment elevation myocardial infarction (STEMI) before percutaneous coronary intervention (PCI) could affect circulating miR-208b level or not. Methods:Patients diagnosed with STEMI undergoing PCI from January 2016 to July 2017 were enrolled from the Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University.The patients were randomly allocated to two groups: (1) control group (n=25), PCI alone; (2) RIC group (n=50), PCI combined with RIC (three cycles of 5 min inflation and 5 min deflation of the right lower limb with blood pressure cuff performed before reperfusion). Serum miR-208b was measured before and immediately, at 24 h, and 48 h after PCI with real-time quantitative polymerase chain reaction. Results: The expression of miR-208b was significantly higher immediately post PCI than that before operation in the control group (84.1±9.0 vs 77.8±9.4; P=0.032), while it was significantly lower immediately post PCI than that before operationin RIC group (71.0±9.3 vs 77.4±8.8; P=0.028).miR-208b level was similar before PCI between the control and RIC groups (P=0.874), which was significantly reduced immediately post PCI in RIC group as compared with the control group (P=0.021).The peak value of creatine kinase isoenzyme (CK-MB) in the limb RIC group was significantly lower than that in the control group ([135.2±18.6] U/L vs [167.7±17.2] U/L; P=0.038).The area under the CK-MB curve of the RIC group was significantly smaller than that of the control group ([3 060.7±17.1] U/L vs [3 635.9±15.1] U/L); P=0.047]. The left ventricular ejection fraction (LVEF) in RIC group was significantly higher than that in the control group ([57.8±7.8]% vs [51.9±7.9]%; P=0.003) post PCI. The expression level of serum miR-208b was positively correlated with CK-MB AUC in RIC group (r=0.498, P<0.001). Conclusions: RIC of the lower limb prior to PCI could reduce miR-208b level and improve cardiac functionin STEMI patients.

肢体远隔缺血适应对急性ST段抬高型心肌梗死直接经皮冠状动脉介入治疗患者循环血微小核糖核酸-208b水平及术后心功能影响

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