丹参酮ⅡA对血瘀型大鼠急性心梗后心功能的影响
2020-08-21林冬铭陈超陆明陈菲王审周亚萍黄抒伟
林冬铭 陈超 陆明 陈菲 王审 周亚萍 黄抒伟



[摘要] 目的 探討丹参酮ⅡA对急性心梗大鼠再灌注损伤的保护作用。 方法 选取30只SD大鼠,建立血瘀模型,随机分为假手术组(Sham组)、AMI对照组(Control组)及丹参酮ⅡA干预组(TSN组)。Sham组只开胸穿线不结扎,Control组与TSN组建立心梗再灌注模型。造模前、再灌注4周后观察各组的超声心动图,再灌注4周后比较各组的血流动力学结果。 结果 超声心动图结果显示Control组的左室收缩末内径(LVIDs)和左室舒张末内径(LVIDd)较Sham组扩大(P<0.05),左室射血分数及左室短轴缩短率较假手术组降低(P<0.05);TSN组与Control组相比,LVIDs及LVIDd有改善(P<0.05),且LVEF%及FS%得到提高(P<0.05)。血流动力学结果显示,再灌注4周后,Control组与假手术组比较,可见HR加快、LVSP下降、LVEDP升高(P<0.05);与Control组比较,TSN组能升高LVSP,降低LVEDP,差异有统计学意义(P<0.05),但HR则无差异(P>0.05)。 结论 丹参酮ⅡA可改善血瘀型大鼠急性心梗后的心功能。
[关键词] 丹参酮ⅡA;急性心肌梗死;无复流;心功能;大鼠
[中图分类号] R285.5 [文献标识码] A [文章编号] 1673-9701(2020)18-0032-05
Impacts of tanshinone ⅡA on cardiac function after acute myocardial infarction in blood stasis rats
LIN Dongming1 CHEN Chao1 LU Ming1 CHEN Fei2 WANG Shen1 ZHOU Yaping3 HUANG Shuwei1
1.Department of Cardiovascular Internal Medicine, the Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 310005, China; 2.Yunhe County Hospital of Traditional Chinese Medicine in Zhejiang Province, Yunhe 323600, China; 3.Zhejiang Chinese Medical University, Hangzhou 310053, China
[Abstract] Objective To investigate the salvage efficacy of tanshinone ⅡA on reperfusion injury in rats with acute myocardial infarction. Methods Thirty SD rats were randomly divided into sham operation group (the sham group), AMI control group (the control group) and tanshinone ⅡA intervention group (the TSN group) to establish blood stasis model. In the sham group, only thoracotomy was performed without ligation. In the control group and the TSN group, myocardial infarction reperfusion model was established. Echocardiography of each group was observed before modeling and four weeks after reperfusion, and hemodynamic results of each group were compared four weeks after reperfusion. Results Echocardiographic results showed that the left ventricular internal dimension in systole(LVIDs) and left ventricular internal dimension-diastole (LVIDd) in the control group were larger than those in the sham group(P<0.05), and the left ventricular ejection fraction and left ventricular short-axis shortening rate were lower than those in the sham group(P<0.05). Compared with the control group, LVIDs and LVIDd in the TSN group were improved(P<0.05), and LVEF% and FS% were improved(P<0.05). Hemodynamic results showed that HR increased, LVSP decreased and LVEDP increased in the control group compared with the sham operation group after four weeks of reperfusion(P<0.05). Compared with the control group, the TSN group increased LVSP and decreased LVEDP with statistically significant differences(P<0.05), but HR had no statistically significant difference(P>0.05). Conclusion Tanshinone ⅡA improves cardiac function after acute myocardial infarction in blood stasis rats.
注:假手术组(Sham组),模型组(Control组),丹参酮ⅡA干预组(TSN组)。Control组与Sham组比较,*P<0.05;TSN组与Control比较,#P<0.05
2.3 三组血流动力学检测
再灌注4周后,AMI对照组(Control组)与假手术组(Sham组)比较,可见心率(HR)加快、左室收缩压(LVSP)下降、左室舒张末压(LVEDP)升高,差异有统计学意义(P<0.05)。与AMI对照组(Control组)比较,丹参酮ⅡA干预组(TSN组)能升高LVSP,降低LVEDP,具有统计学意义(P<0.05),但HR则无差异(P>0.05)。见表3。
注:TSN组与Sham组比较,*P<0.05;TSN组与Control组比较,#P<0.05;TSN组与Control组比较,**P>0.05
2.4 Control组与TSN组心肌无复流面积和心肌梗死面积比较
再灌注4周后,Control组与TSN组相比缺血面积比相似(P>0.05),表明各组间基线一致,其梗死面积及无复流面积存在可比性。与Control组相比,TSN组的梗死面积和无复流面积缩小,有统计学差异(P<0.05)。见表4。
3 讨论
随着血运重建技术的发展,急性心肌梗死的死亡率得到了下降,但缺血再灌注损伤然仍是临床的重要课题[9]。现代研究显示缺血再灌注损伤主要机制与氧化应激、钙超载、炎症因子及线粒体膜通透性等存在相关性[10-13],但临床如何有效改善缺血再灌注损伤仍待深入探索,尤其是如何维护缺血损伤后的心功能更是临床重点。……p>
