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A Model of Cardiac Remodeling Through Constriction of the Abdominal Aorta in Rats
Published on: December 2, 2016
Catechin ameliorates cardiac dysfunction in rats with chronic heart failure by regulating the balance between Th17
Qi Zhang1, Li-Qun Hu, Chang-Sen Yin
1Geriatric Department of the Affiliated Provincial Hospital of Anhui Medical University, Anhui Institute of Cardiovascular Disease, Hefei, 230001, China, zhangqi19982003@126.com.
Insights
Catechin effectively treats chronic heart failure (CHF) in rats by improving heart function and regulating immune cells, specifically T helper 17 (Th17) and regulatory T (Treg) cells. This study highlights catechin
Area of Science:
- Cardiovascular Research
- Immunology
- Pharmacology
Background:
- Cytokine network imbalance is implicated in chronic heart failure (CHF) progression.
- Catechin demonstrates cardioprotective effects in various heart conditions.
- The specific impact of catechin on CHF and its immunomodulatory mechanisms remain largely unexplored.
Purpose of the Study:
- To evaluate the efficacy of catechin in a rat model of CHF.
- To investigate the relationship between catechin treatment and immunoregulation in CHF.
Main Methods:
- Chronic heart failure (CHF) induced in rats via abdominal aortic ligation.
- Myocardial function assessed by left ventricular pressures.
- Cytokine levels (IL-17, IL-10) and Th17/Treg cell populations measured using ELISA and flow cytometry.
Main Results:
- Catechin treatment significantly improved cardiac function in CHF rats.
- Myocardial dysfunction severity correlated with serum IL-17/IL-10 ratios.
- Catechin inhibited immune activation, balanced IL-17/IL-10 levels, and corrected Th17/Treg cell polarization.
Conclusions:
- Oral catechin administration effectively mitigated abdominal aorta ligation-induced CHF in rats.
- Catechin's therapeutic effects are closely linked to its modulation of Th17 and Treg cells.
Objective:
Disequilibrium of the cytokine network was reported to play an important role in the progression of chronic heart failure (CHF). Catechin exerts cardioprotection through treating many kinds of angiocardiopathy. However, the effects of catechin on CHF are currently unclear. Therefore, the main aim of this study was to investigate the efficacy of catechin on CHF rats as well as its relationship to immunoregulation.
Methods:
CHF was induced in rats by ligation of the abdominal aorta. Myocardial function was evaluated by left ventricular systolic pressure and left ventricular end-diastolic pressure. The cytokine level was measured by enzyme-linked immunosorbent assay. Th17 and Treg levels in peripheral blood and spleen were analyzed by flow cytometry.
Results:
The results showed that catechin treatment (50, 100 mg/kg/day) markedly improved myocardial function in rats treated with abdominal aortic coarctation. Severity of myocardial dysfunction in CHF rats significantly correlated with serum values of interleukin-17 (IL-17)/IL-10. Further results indicated catechin obviously inhibited immune activation, regulated unbalanced levels of IL-17/IL-10, and reversed abnormal polarization of TH17 as well as Treg in peripheral blood and spleen.
Conclusions:
Taken together, oral administration of catechin effectively suppressed abdominal aorta ligation-induced CHF in rats, which was closely associated with its modulation on Th17 and Treg.
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