Siwei Tumuxiang Powder Ameliorates Mechanical Stretch-induced Hypertrophy of H9c2 Cardiomyocytes by Regulating the MiR-34a-5p/Notch1 Signaling Pathway
10.11969/j.issn.1673-548X.2024.08.021
- VernacularTitle:四味土木香散通过调节miR-34a-5p/Notch1信号通路改善机械牵张诱导的H9c2心肌细胞肥大
- Author:
Jianying LI
1
;
Minghui WEI
;
Ziyu LU
Author Information
1. 010059 呼和浩特,内蒙古医科大学基础医学院
- Keywords:
Myocardial hypertrophy;
Siwei tumuxiang powder;
MiRNA-34a-5p;
Notch1 signaling pathway
- From:
Journal of Medical Research
2024;53(8):107-114
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the protective effect and mechanism of siwei tumuxiang powder(STP)on the model of H9c2 cardiomyocytes hypertrophy induced by mechanical stretching in rats.Methods The STP drug-containing serum and the hypertrophic cell model were prepared,and the optimal dose and time of action of STP drug-containing serum were determined.The expressions of at-rial natriuretic peptide(ANP),brain natriuretic peptide(BNP),miR-34a-5p,Notch1 and other factors in H9c2 cardiomyocytes were detected to verify whether STP exerted a protective effect on H9c2 cardiomyocytes by regulating the miR-34a-5p/Notch1 pathway.Results The optimal dose(0.972g/kg)of STP drug-containing serum was low-dose,and the action time was 24 hours.STP de-creased the expressions of ANP,BNP and miR-34a-5p in model cells(P＜0.05).Transfection of miR-34a-5p mimic reversed the effect of STP on ANP and BNP expressions(P＜0.05).Knocking down Notch1 by siRNA reversed the effect of STP on ANP and BNP ex-pressions(P＜0.05).Notch1 was the direct target gene of miR-34a-5p,and miR-34a-5p decreased the expression of Notch1(P＜0.05).After STP intervention,the expression of Notch1,NICD1 and Hes1 proteins were decreased.Transfection of miR-34a-5p mim-ic reversed the effect of STP on the expressions of Notch1,NICD1 and Hes1 proteins(P＜0.05).Conclusion STP exerts a protective effect on mechanical stretch-induced H9c2 cardiomyocyte hypertrophy by miR-34a-5p to negatively regulate the Notch1 signaling pathway.
