Effects of Sanjia Powder on myocardial fibrosis in rats with diabetic cardiomyopathy
10.3760/cma.j.cn115398-20240328-00355
- VernacularTitle:三甲散对糖尿病心肌病大鼠心肌纤维化的影响
- Author:
Qin LIU
1
;
Liqing SU
;
Hua HU
;
Yuanle YANG
;
Jinxue LIU
Author Information
1. 湖南中医药大学中医学院，长沙 410208
- Keywords:
Diabetic cardiomyopathies;
Sanjia Powder;
Myocardial fibrosis;
endothelial-to-mesenchymal transition;
Rats
- From:
International Journal of Traditional Chinese Medicine
2024;46(11):1455-1461
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the effects of Sanjia Powder on myocardial fibrosis in diabetic cardiomyopathy (DCM) model rats; To elaborate its mechanism.Methods:A DCM rat model was constructed using STZ single intraperitoneal injection combined with high-sugar and high-fat feeding. The model rats were divided into model group, TCM group, Western medicine group, miR-21 inhibition group, and miR-21 inhibition control group using a random number table method, with 10 rats in each group; another 10 SD rats were set as normal group. TCM group was orally administered with Sanjia Powder water decoction at a dose of 6.2 g/kg, and the Western medicine group was administered metformin 250 mg/kg + enalapril 45 mg/kg by gavage. miR-21 inhibition group, miR-21 inhibition control group, normal group, and model group were given the same volume of distilled water by gavage, once a day, for 4 weeks; at the same time, the normal group, the model group, TCM group, and the Western medicine group were injected with the same amount of normal saline in the tail vein. The miR-21 inhibition group received tail vein injection of miR-21 inhibitor at a dose of 20 mg/kg, and the miR-21 inhibition control group received tail vein injection of miR-21 inhibitor NC at a dose of 20 mg/kg, twice a week, for 4 weeks. The morphological changes of myocardial tissue were observed using HE; the expression of Collagen-Ⅰ in myocardial tissue was detected using Western Blot; the expressions of endothelial cell marker CD31 and stromal cell marker FSP1 in myocardial tissue were detected using immunofluorescence method.Results:Compared with the model group, the pathological morphology of myocardial tissue improved in the TCM group, Western medicine group, and miR-21 inhibition group, while the expressions of Collagen-Ⅰ and FSP1 decreased ( P<0.01) and the expression of CD31 increased ( P<0.01); there was no statistically significant difference in the expressions of Collagen-Ⅰ, CD31, and FSP1 between the TCM group and the miR-21 inhibition group ( P>0.05). Conclusion:Sanjia Powder can improve myocardial fibrosis in rats with diabetic cardiomyopathy, and its mechanism may be related to the up-regulation of CD31 expression and down-regulation of FSP1 expression, thereby inhibiting endothelial mesenchymal transition, and may also be related to the inhibition of miR-21 expression.
