SHI Yujiao,YANG Lin,LIU Chunqiu,et al.Material Basis and Molecular Mechanism of Linggui Qihua Prescription Against Myocardial Fibrosis in Heart Failure with Preserved Ejection Fraction[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(20):20-29.
SHI Yujiao,YANG Lin,LIU Chunqiu,et al.Material Basis and Molecular Mechanism of Linggui Qihua Prescription Against Myocardial Fibrosis in Heart Failure with Preserved Ejection Fraction[J].Chinese Journal of Experimental Traditional Medical Formulae,2023,29(20):20-29. DOI: 10.13422/j.cnki.syfjx.20231038.
Material Basis and Molecular Mechanism of Linggui Qihua Prescription Against Myocardial Fibrosis in Heart Failure with Preserved Ejection Fraction
To explore the material basis and molecular mechanism of Linggui Qihua prescription (LGQH) against myocardial fibrosis in heart failure with preserved ejection fraction (HFpEF).
Method
2
Liquid chromatography-mass spectrometry (LC-MS) was used to qualitatively analyze the active components of LGQH. AutoDock software was employed for molecular docking between the active components of LGQH and target proteins including
α
-smooth muscle actin (
α
-SMA), type Ⅰ collagen (ColⅠ), type Ⅲ collagen (ColⅢ), matrix metalloproteinase-9 (MMP-9), and tissue inhibitor of metalloproteinase-1 (TIMP-1).
In vivo
experiments were conducted on 40 spontaneously hypertensive rats (SHRs) aged 4 weeks, which were divided into an HFpEF group, an Entresto group (0.018 g·kg
-1
), and low- and high-dose LGQH groups (3.87, 7.74 g·kg
-1
). A high-fat, high-salt, and high-sugar diet was administered for 16 weeks along with intraperitoneal injection of streptozotocin solution for 8 weeks to establish an HFpEF model in rats. The blank group consisted of 10 Wistar Kyoto (WKY) rats and 10 SHRs. After successful modeling, the WKY, SHR, and HFpEF groups were given equal volumes of normal saline, while the other three groups received predetermined interventions. Daily oral gavage was performed for 6 weeks. After intervention, echocardiography was conducted to measure left ventricular (LV) anterior wall thickness (LVAWd), LV posterior wall thickness (LVPWd), LV internal diameter at end-diastole (LVIDd), LV ejection fraction (LVEF), isovolumic relaxation time (IVRT), early diastolic peak velocity of mitral valve inflow (E), and early diastolic mitral annular velocity (e'). The E/e' ratio was calculated. Enzyme-linked immunosorbent assay (ELISA) was used to detect serum atrial natriuretic peptide (ANP), B-type natriuretic peptide (BNP), and galectin-3 (Gal-3). Myocardial fibrosis was observed through Masson staining of pathological sections, and collagen volume fraction (CVF) and perivascular fibrosis ratio (PFR) were calculated. Real-time polymerase chain reaction (PCR) and Western blot were employed to detect LV myocardial mRNA and protein expression of
α
-SMA, ColⅠ, ColⅢ, MMP-9, and TIMP-1.
Result
2
LC-MS identified 13 active components in LGQH. Molecular docking indicated stable binding of the 13 compounds with five target proteins.
In vivo
experiments showed that compared with the blank group, the HFpEF group had significantly increased LVAWd, LVPWd, LVIDd, IVRT, E/e', ANP, BNP, Gal-3, CVF, and PFR. LV myocardial
α
-SMA, ColⅠ, and ColⅢ mRNA and protein expression was significantly upregulated, while MMP-9/TIMP-1 mRNA and protein ratios were significantly downregulated (
P
<
0.05,
P
<
0.01). Compared with the HFpEF group, LGQH might dose-dependently reduce LVAWd, LVPWd, LVIDd, IVRT, E/e', ANP, BNP, Gal-3, CVF, and PFR, downregulated myocardial α-SMA, ColⅠ, ColⅢ mRNA expression, α-SMA, and ColⅠ protein expression, and upregulated MMP-9/TIMP-1 mRNA and protein expression (
P
<
0.05,
P
<
0.01).
Conclusion
2
LGQH contains multiple active components and may inhibit myocardial fibrosis in HFpEF rats. It may further alleviate LV hypertrophy, dilation, and diastolic dysfunction, making it an effective Chinese medicinal prescription for treating HFpEF.
关键词
Keywords
references
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