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1.中国中医科学院 广安门医院,北京 100053
2.中国中医科学院 西苑医院,北京 100091
3.北京中医药大学,北京 100029
4.中国中医科学院 望京医院,北京 100102
Received:09 January 2025,
Accepted:20 March 2025,
Published Online:26 March 2025,
Published:20 July 2025
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王哲,汪国梁,王梓仪等.基于FUNDC1介导的线粒体自噬探究黄芪-丹参对心肌缺血再灌注损伤大鼠的保护作用[J].中国实验方剂学杂志,2025,31(14):31-39.
WANG Zhe,WANG Guoliang,WANG Ziyi,et al.Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma Ameliorates Myocardial Ischemia-reperfusion Injury in Rats via FUNDC1-dependent Mitophagy[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(14):31-39.
王哲,汪国梁,王梓仪等.基于FUNDC1介导的线粒体自噬探究黄芪-丹参对心肌缺血再灌注损伤大鼠的保护作用[J].中国实验方剂学杂志,2025,31(14):31-39. DOI: 10.13422/j.cnki.syfjx.20250541.
WANG Zhe,WANG Guoliang,WANG Ziyi,et al.Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma Ameliorates Myocardial Ischemia-reperfusion Injury in Rats via FUNDC1-dependent Mitophagy[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(14):31-39. DOI: 10.13422/j.cnki.syfjx.20250541.
目的
2
明确黄芪-丹参对大鼠心肌缺血再灌注损伤的作用并探索其机制。
方法
2
将72只雄性SD大鼠随机平均分为假手术组,模型组,黄芪-丹参低、中、高剂量组(3.09、6.71、12.34 g·kg
-1
),曲美他嗪组(20 mg·kg
-1
),连续给药10 d后,除假手术组只穿线不结扎外,其余组大鼠结扎左前降支45 min而后再灌注3 h。再灌注结束后,通过伊文思蓝及2,3,5-三苯基氯化四氮唑(TTC)染色检测大鼠心肌梗死及心肌梗死危险区的面积;生化法检测乳酸脱氢酶(LDH)、肌酸激酶同工酶(CK-MB)、丙二醛(MDA)水平,超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性;通过原位末端标记法(TUNEL)检测心肌组织细胞凋亡情况,免疫荧光技术检测活性氧(ROS)表达水平,通过蛋白免疫印迹法(Western blot)检测微管自噬相关蛋白1轻链3(LC3)、FUN14结构域蛋白1(FUNDC1)的蛋白表达。
结果
2
与假手术组比较,模型组大鼠心肌梗死及心肌梗死危险区面积显著升高(
P
<
0.01),CK-MB、LDH、MDA水平显著升高(
P
<
0.01),SOD、GSH-Px活性显著降低(
P
<
0.01),心肌组织细胞凋亡指数显著增加(
P
<
0.01),FUNDC1表达及LC3Ⅱ/LC3Ⅰ显著升高(
P
<
0.01)。与模型组比较,黄芪-丹参各剂量组及曲美他嗪组心肌梗死及心肌梗死危险区面积明显减少(
P
<
0.05,
P
<
0.01),CK-MB、MDA水平显著降低(
P
<
0.01),SOD及GSH-Px活性明显增加(
P
<
0.05);黄芪-丹参中剂量组、曲美他嗪组可降低心肌组织细胞凋亡指数(
P
<
0.01),减少
心肌组织中FUNDC1的表达,降低LC3Ⅱ/LC3Ⅰ(
P
<
0.05)。
结论
2
黄芪-丹参可改善大鼠心肌缺血再灌注损伤,减少心肌细胞凋亡和氧化应激损伤,其潜在机制可能与通过抑制FUNDC1介导的线粒体自噬过度激活有关。
Objective
2
To clarify the effect of Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma on myocardial ischemia-reperfusion injury in rats and explore its mechanism.
Methods
2
Seventy-two male SD rats were randomized into sham, model, low-, medium-, and high-dose (3.09, 6.71, and 12.34 g·kg
-1
) Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma, and trimetazidine (20 mg·kg
-1
) groups. After 10 consecutive days of drug administration, except for the sham operation group which only had threading without ligation, the remaining groups underwent left anterior descending artery ligation for 45 min followed by 3 h of reperfusion. After reperfusion, Evans blue staining and 2,3,5-triphenyltetrazolium chloride (TTC) staining were used to detect the area of myocardial infarction and the area at risk. Biochemical methods were adopted to determine the levels of lactate dehydrogenase (LDH), creatine kinase isoenzyme (CK-MB), and malondialdehyde (MDA) and the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). Terminal deoxynucleotidyl transferase dUTP nick end labeling was employed to detect apoptosis in the myocardial tissue, and immunofluorescence assay was employed to assess the reactive oxygen species (ROS) level. Western blot was employed to determine the protein levels of microtubule-associated protein 1 light chain 3 (LC3) and FUN14-domain containing 1 (FUNDC1).
Results
2
Compared with the sham group, the model group showed increased myocardial infarction area and area at risk (
P
<
0.01), elevated levels of CK-MB, LDH, and MDA (
P
<
0.01), decreased activities of SOD and GSH-Px (
P
<
0.01), increased apopto
sis index in the myocardial tissue (
P
<
0.01), and up-regulated FUNDC1 expression and LC3Ⅱ/LC3Ⅰ (
P
<
0.01). Compared with the model group, the three Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma groups and the trimetazidine group showed reduced myocardial infarction area and area at risk (
P
<
0.05,
P
<
0.01), declined levels of CK-MB and MDA (
P
<
0.01), and increased activities of SOD and GSH-Px (
P
<
0.05). The medium-dose Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma group and the trimetazidine group showed reduced apoptosis index in the myocardial tissue (
P
<
0.01) and down-regulated expression of FUNDC1 and LC3Ⅱ/LC3Ⅰ in the myocardial tissue (
P
<
0.05).
Conclusion
2
Astragali Radix-Salviae Miltiorrhizae Radix et Rhizoma can ameliorate myocardial ischemia-reperfusion injury and reduce myocardial cell apoptosis and oxidative stress damage in rats by inhibiting the excessive activation of mitophagy mediated by FUNDC1.
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