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1.中国中医科学院 西苑医院,北京 100091
2.福建中医药大学 中西医结合研究院,福州 350100
Received:08 July 2024,
Accepted:02 September 2024,
Published Online:12 September 2024,
Published:20 March 2025
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陈一帆,褚剑锋,姜众会等.清心解瘀颗粒调控线粒体自噬对C57B/L6小鼠心肌梗死后心室重构的影响[J].中国实验方剂学杂志,2025,31(06):70-78.
CHEN Yifan,CHU Jianfeng,JIANG Zhonghui,et al.Effect of Qingxin Jieyu Granules Regulating Mitophagy on Ventricular Remodeling After Myocardial Infarction of C57B/L6 Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(06):70-78.
陈一帆,褚剑锋,姜众会等.清心解瘀颗粒调控线粒体自噬对C57B/L6小鼠心肌梗死后心室重构的影响[J].中国实验方剂学杂志,2025,31(06):70-78. DOI: 10.13422/j.cnki.syfjx.20241436.
CHEN Yifan,CHU Jianfeng,JIANG Zhonghui,et al.Effect of Qingxin Jieyu Granules Regulating Mitophagy on Ventricular Remodeling After Myocardial Infarction of C57B/L6 Mice[J].Chinese Journal of Experimental Traditional Medical Formulae,2025,31(06):70-78. DOI: 10.13422/j.cnki.syfjx.20241436.
目的
2
探讨清心解瘀颗粒对于心肌梗死后心室重构小鼠的影响及对线粒体自噬的调控作用。
方法
2
60只雄性C57BL/6小鼠随机分为假手术组,模型组,清心解瘀低、中、高剂量组(1.3、2.6、5.2 g·kg
-1
),沙库巴曲缬沙坦钠组(0.03 g·kg
-1
),每组10只,除假手术组外,其余各组均使用冠状动脉左前降支结扎方法建立心肌梗死模型。超声检测小鼠左室舒张末期和收缩末期内径(LVIDd, LVIDs)、左室舒张期和收缩期后壁厚度(LVPWd, LVPWs)、左室舒张末期和收缩末期容积(LV Vold, LV Vols)、左室射血分数(LVEF)、左室短轴缩短率(LVFS);计算小鼠心脏质量指数、心胫比;酶联免疫吸附测定法(ELISA)检测小鼠血清脑纳肽(BNP)、肌酸激酶同工酶(CK-MB)、血管紧张素Ⅱ(AngⅡ)、乳酸脱氢酶(LDH);苏木素-伊红(HE)、马松(Masson)染色观察小鼠心肌组织形态;免疫组化检测小鼠心肌组织血管生成蛋白碱性成纤维细胞生长因子(bFGF)、血管内皮生长因子(VEGF)表达;透射电镜观察小鼠心肌组织线粒体形态;蛋白免疫印迹法(Western blot)检测各组小鼠心肌组织磷酸化腺苷酸活化蛋白激酶(p-AMPK)、磷酸化哺乳动物雷帕霉素靶蛋白(p-mTOR)蛋白表达。
结果
2
与假手
术组比较,模型组小鼠LV Vold、LV Vols、LVIDd、LVIDs、心脏质量指数、心胫比、BNP、LDH、p-mTOR蛋白表达增加(
P
<
0.05),LVPWd、LVPWs、LVEF、LVFS、p-AMPK蛋白表达减少(
P
<
0.05),小鼠心肌细胞有大量炎性细胞浸润并伴有大量胶原沉积,bFGF、VEGF蛋白表达减少,心肌组织线粒体肿胀,嵴碎裂;与模型组比较,沙库巴曲缬沙坦钠组及清心解瘀颗粒中剂量组的LVIDs、LV Vold、LV Vols、BNP、CK-MB、LDH、p-mTOR蛋白表达明显减少(
P
<
0.05),LVEF、LVFS、p-AMPK表达明显增加(
P
<
0.05),各给药组心肌组织炎性细胞浸润及胶原沉积均得到改善,bFGF、VEGF蛋白表达增多,各组小鼠心肌组织线粒体肿胀减轻,出现自噬小体和溶酶体。
结论
2
清心解瘀颗粒通过上调心肌梗死后心室重构小鼠心肌组织p-AMPK表达,下调p-mTOR表达,来调节心肌组织线粒体自噬,抑制心室重构,改善心功能。
Objective
2
To explore the effects of Qingxin Jieyu granules on ventricular remodeling of mice after myocardial infarction, and their regulatory role in mitophagy.
Methods
2
Sixty male C57BL/6 mice were randomly assigned to six groups: sham-operated group, model group, Qingxin Jieyu granules low-, medium-, and high-dose groups (1.3, 2.6, 5.2 g·kg
-1
), and sacubitril valsartan sodium group (0.03 g·kg
-1
), with 10 mice per group. Except for the sham-operated group, all other groups utilized left anterior descending coronary artery ligation to build a myocardial infarction model. Ultrasound was used to measure left ventricular parameters, including end-diastolic and end-systolic diameters (LVIDd, LVIDs), diastolic and systolic posterior wall thickness (LVPWd, LVPWs), end-diastolic and end-systolic volumes (LV Vold, LV Vols), left ventricular ejection fraction (LVEF), and fractional shortening (LVFS). Additionally, the heart mass index and heart weight/tibia length ratio of mice were calculated. Enzyme-linked immunosorbent assay (ELISA) was employed to quantify brain natriuretic peptide (BNP), creatine kinase isoenzyme (CK-MB), angiotensinⅡ (AngⅡ), and lactate dehydrogenase (LDH) levels in the serum of mice. Histological analysis using hematoxylin-eosin (HE) and Masson staining was conducted to examine morphological changes in myocardi
al tissue. Immunohistochemistry assessed the expression of vascular growth factors, including basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF). Transmission electron microscopy was used to scrutinize mitochondrial morphology in the myocardial tissue of mice. Western blot was performed to analyze the expression of phosphorylated adenosine monophosphate activated protein kinase (p-AMPK) and phosphorylated mammalian target of rapamycin (p-mTOR) proteins in myocardial tissue from each experimental group.
Results
2
Compared to the sham-operated group, the model group mice exhibited significantly elevated levels of LV Vold, LV Vols, LVIDd, LVIDs, cardiac mass index, heart weight/tibia length ratio, BNP, LDH, and p-mTOR protein expression (
P
<
0.05), along with decreased levels of LVPWd, LVPWs, LVEF, LVFS, and p-AMPK protein expression (
P
<
0.05). The model group also displayed substantial inflammatory cell infiltration, collagen deposition in myocardial cells, reduced expression of bFGF and VEGF, mitochondrial swelling, and cristae fragmentation. Compared to the model group, the sacubitril/valsartan group and mid-dose Qingxin Jieyu granules group showed significant reductions in LVIDs, LV Vold, LV Vols, BNP, CK-MB, LDH, and p-mTOR protein expression (
P
<
0.05), coupled with increases in LVEF, LVFS, and p-AMPK expression (
P
<
0.05). Improvements were observed across all treatment groups, including reduced inflammatory cell infiltration and collagen deposition, increased bFGF and VEGF expression, alleviated mitochondrial swelling, and the presence of autophagosomes and lysosomes
.
Conclusion
2
The results show that Qingxin Jieyu granules can regulate mitochondrial autophagy in myocardial tissue and inhibit ventricular remodeling to improve cardiac performance, by up-regulating the p-AMPK expression in the myocardial tissue of mice with ventricular remodeling after myocardial infarction, and down-regulating the p-mTOR expression.
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