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卡维地洛联合特布他林对心肌梗死大鼠心功能的影响及其作用机制 被引量:4

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摘要 目的探讨卡维地洛联合特布他林对心肌梗死(心梗)大鼠心功能的影响及其作用机制。方法结扎冠状动脉前降支制备心梗大鼠模型,术后1周随机分为安慰剂组,卡维地洛组,联合治疗组,另设假手术组(冠状动脉前降支穿线但不结扎)为对照组。卡维地洛组给予卡维地洛生理水溶液8mg/kg,一日两次灌胃。联合治疗组给予特布他林生理水溶液2mg/kg,卡维地洛生理水溶液8mg/kg一日两次灌胃。安慰剂组及假手术组均给予等量生理盐水,一日两次灌胃。干预8周后行超声心动图检查、血流动力学检测、心肌细胞中谷胱甘肽及凋亡蛋白测定。结果①安慰剂组左心室舒张末期内径(LVEDd)、左室收缩末期内径(LVESd)大于假手术组,射血分数(EF)、短轴缩短率(FS)则低于假手术组(P<0.05)。药物治疗组较安慰剂组LVEDd、LVESd缩小,EF、FS提高(P<0.05)。联合治疗组较卡维地洛组LVEDd、LVESd更小,EF、FS更高(P<0.05)。②安慰剂组血流动力学指标较假手术组明显恶化(P<0.01);药物干预组较安慰剂组心功能指标改善(P<0.05);联合治疗组较卡维地洛组心功能指标进一步改善(P<0.05)。③安慰剂组较假手术组心肌细胞凋亡蛋白(bcl-2)、还原型谷胱甘肽(GSH)减少,氧化性谷胱甘肽(GSSG)增加(P<0.01),药物治疗组较安慰剂组bcl-2、GSH增加,GSSG减少(P<0.01),联合治疗组较卡维地洛组bcl-2、GSH增加,GSSG减少(P<0.05)。结论特布他林联合卡维地洛可改善心梗大鼠心功能,减轻心室重构,增加GSH、bcl-2的表达。增强细胞的抗凋亡、抗氧化作用可能使其疗效提高的机制之一。
出处 《中西医结合心脑血管病杂志》 2013年第3期339-341,共3页 Chinese Journal of Integrative Medicine on Cardio-Cerebrovascular Disease
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