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Ginsenoside Rb1 improves cardiac function and remodeling in heart failure.
Xian Zheng1, Shuai Wang2, Xiaoming Zou1
1Graduate School, Liaoning University of Traditional Chinese Medicine, 79 Chongshan East Road, Shenyang 110847, P.R. China.
Experimental Animals
|April 4, 2017
Summary
Ginsenoside Rb1, a compound from ginseng, improved heart function and reduced cardiac remodeling in heart failure (HF) models. It worked by regulating key signaling pathways and enhancing glucose uptake.
Area of Science:
- Cardiovascular Research
- Pharmacology
- Integrative Medicine
Background:
- Heart failure (HF) is a complex syndrome characterized by cardiac dysfunction and adverse remodeling.
- Ginsenosides, active compounds from Panax ginseng, have shown potential cardioprotective effects.
- The specific mechanisms of ginsenoside Rb1 in HF remain incompletely understood.
Purpose of the Study:
- To investigate the therapeutic effects of ginsenoside Rb1 on cardiac function and remodeling in a rat model of heart failure.
- To elucidate the underlying molecular mechanisms, including signaling pathways and cellular processes, involved in ginsenoside Rb1's action.
Main Methods:
- Heart failure was induced in rats, followed by administration of ginsenoside Rb1 (35 and 70 mg/kg) or losartan (positive control) for 8 weeks.
- Cardiac function was assessed using hemodynamic parameters.
- Histological analyses (HE, Masson's trichrome), cardiac hypertrophy markers, fibrosis, mitochondrial membrane potential, and glucose transporter type 4 (GLUT4) levels were evaluated.
- Key signaling pathways (TGF-β1/Smad, ERK, Akt) were analyzed.
Main Results:
- High-dose ginsenoside Rb1 significantly improved cardiac function, reduced heart rate, and alleviated cardiac hypertrophy and fibrosis.
- It decreased levels of cardiac remodeling markers (ANF, β-MHC, periostin, collagen I) and components of the renin-angiotensin system (Ang II, ACE, AT1 receptor).
- Ginsenoside Rb1 enhanced GLUT4 translocation, decreased mitochondrial membrane potential, and modulated TGF-β1/Smad, ERK, and Akt signaling pathways.
Conclusions:
- Ginsenoside Rb1 demonstrates significant cardioprotective effects against heart failure-induced remodeling and dysfunction.
- Its therapeutic actions involve restoring cardiac and mitochondrial function, increasing glucose uptake, and modulating key fibrotic and hypertrophic signaling pathways.
- Ginsenoside Rb1 represents a potential therapeutic agent for managing heart failure.