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1.首都医科大学附属北京世纪坛医院心脏外科,北京 100038
2.首都医科大学附属北京朝阳医院医学研究中心,北京 100020
主治医师,硕士。研究方向:心肌缺血/再灌注损伤。E-mail:sjtxzwk@163.com
主任医师,硕士。研究方向:心肌缺血/再灌注损伤。E-mail:13911028861@163.com
收稿:2022-03-31,
修回:2022-08-15,
纸质出版:2022-10-30
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陈兴华,张继倬,韩露.阿司匹林调节miR-340-5p/HMGB1/TLR4通路对大鼠心肌缺血/再灌注损伤的影响[J].中国药房,2022,33(20):2508-2513.
CHEN Xinghua,ZHANG Jizhuo,HAN Lu.Effects of aspirin on myocardial injury in rats with myocardial ischemia/reperfusion by regulating miR-340-5p/HMGB1/TLR4 pathway[J].ZHONGGUO YAOFANG,2022,33(20):2508-2513.
陈兴华,张继倬,韩露.阿司匹林调节miR-340-5p/HMGB1/TLR4通路对大鼠心肌缺血/再灌注损伤的影响[J].中国药房,2022,33(20):2508-2513. DOI: 10.6039/j.issn.1001-0408.2022.20.15.
CHEN Xinghua,ZHANG Jizhuo,HAN Lu.Effects of aspirin on myocardial injury in rats with myocardial ischemia/reperfusion by regulating miR-340-5p/HMGB1/TLR4 pathway[J].ZHONGGUO YAOFANG,2022,33(20):2508-2513. DOI: 10.6039/j.issn.1001-0408.2022.20.15.
目的
2
探讨阿司匹林(Asp)通过调节微RNA-340-5p(miR-340-5p)/高迁移率族蛋白1(HMGB1)/Toll样受体4(TLR4)通路对大鼠心肌缺血/再灌注(I/R)损伤的影响。
方法
2
将雄性SD大鼠分为假手术(Sham)组(开胸不结扎)、I/R组(构建I/R损伤模型)、Asp预处理(I/R+Asp)组(Asp预处理7 d+造模)、I/R+Asp+in-miR-340-5p组[Asp预处理7 d+提前转染miR-340-5p抑制物+造模]和I/R+Asp+HMGB1组(Asp预处理7 d+提前转染过表达HMGB1+造模),每组20只。检测各组大鼠心肌损伤指标(乳酸脱氢酶、肌酸激酶同工酶MB、心肌肌钙蛋白Ⅰ)、炎症和氧化应激指标(髓过氧化物酶、超氧化物歧化酶、谷胱甘肽过氧化物酶、丙二醛)水平,观察其心肌组织病理改变,检测其心肌梗死面积、细胞凋亡情况以及心肌组织中miR-540-5p和HMGB1、TLR4蛋白的表达情况;以大鼠心肌细胞H9C2为对象,考察miR-340-5p与HMGB1的靶向关系。
结果
2
Asp预处理可显著抑制I/R损伤模型大鼠血清心肌损伤指标水平的升高,可减轻炎症反应、抑制氧化应激反应、缩小心肌梗死面积并减少细胞凋亡,可显著上调miR-340-5p的表达并下调HMGB1、TLR4蛋白的表达(
P
<0.05);抑制miR-340-5p或过表达HMGB1均可逆转Asp的上述保护作用(
P
<0.05)。细胞实验结果显示,miR-340-5p可靶向负调控HMGB1的表达(
P
<0.05)。
结论
2
Asp可通过调节miR-340-5p/HMGB1/TLR4通路来减轻大鼠炎症反应和氧化应激,减少心肌组织中的细胞凋亡,进而发挥对心肌I/R损伤的保护作用。
OBJECTIVE
2
To investigate the effects of aspirin (Asp) on myocardial ischemia/reperfusion (I/R) injury by regulating microRNA-340-5p (miR-340-5p)/high mobility group box 1 (HMGB1)/Toll-like receptor 4 (TLR4) pathway.
METHODS
2
Male SD rats were divided into sham operation (Sham) group (thoracotomy without ligation), I/R group (I/R injury model was constructed), and Asp pretreatment (I/R+Asp) group (7 d of Asp pretreatment+modeling), I/R+Asp+in-miR-340-5p group [Asp pretreatment 7 d+transfection with miR-340-5p inhibitor 48 h before modeling+modeling] and I/R+Asp+HMGB1 group (7 d of Asp pretreatment+transfection with overexpression of HMGB1 48 h before modeling+modeling), with 20 rats in each group. The levels of myocardial injury indexes [lactate dehydrogenase, creatine kinase isoenzyme-MB, cardiac troponin Ⅰ], inflammation and oxidative stress indexes [myeloperoxidase, superoxide dismutase, glutathione peroxidase, malondialdehyde] were detected in each group, and the pathological changes of myocardial tissue were observed. The myocardial infarction area, cell apoptosis and the expression of miR-540-5p, HMGB1 and TLR4 in myocardial tissue were detected. Cardiomyocyte H9C2 of rats was used as the object to investigate the targeting relationship between miR-340-5p and HMGB1.
RESULTS
2
Asp pretreatment could significantly inhibit the increase of serum myocardial injury indexes in I/R model rats, reduce inflammation and inhibit oxidative stress, reduce myocardial infarct size and apoptosis, and significantly up-regulated the expression of miR-340-5p and down-regulated the expression of HMGB1 and TLR4 proteins (
P
<0.05); inhibition of miR-340-5p or overexpression of HMGB1 could reverse the above protective effects of Asp (
P
<0.05). miR-340-5p could target and negatively regulate HMGB1 expression (
P
<0.05).
CONCLUSIONS
2
Asp can reduce inflammation and oxidative stress by regulating the miR-340-5p/HMGB1/TLR4 pathway, reduce apoptosis in myocardial tissue, and play a protective role against myocardial I/R injury.
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