Action mechanism of resveratrol intervention on ventricular remodeling in exercise-induced fatigue rats

doi:10.12307/2024.284

Abstract

Abstract: BACKGROUND: Studies have shown that resveratrol can relieve exercise-induced fatigue and protect the heart, but its action mechanism needs further study.
OBJECTIVE: To explore the protective effect and regulatory mechanism of resveratrol on ventricular remodeling in exercise-induced fatigue rats.
METHODS: Totally 48 male Sprague-Dawley rats were randomly divided into four groups, with 12 rats in each group. Rats in the blank control group were fed conventionally. After one week of adaptive training, rats in the exercise-related fatigue group and exercise-related fatigue with resveratrol supplement group were trained by 6-week weight-bearing swimming (5% body mass lead block fixed in the tail, 70%-80% maximal oxygen uptake intensity), 6 days a week, 60 minutes a day. Rats in the resveratrol supplement group and exercise-related fatigue with resveratrol supplement group were given resveratrol (50 mg/kg per day) by gavage one hour after exercise intervention. Blank control group and exercise-related fatigue group were given the same volume of 2% dimethyl sulfoxide, 6 days a week, once a day for 6 weeks. The body mass and heart mass of the rats were measured 24 hours after the last intervention. Plasma creatine kinase isoenzyme, cardiac troponin 1, pyruvate dehydrogenase and uncoupling protein 1 levels in myocardial tissue were determined by ELISA. The mRNA expression levels of ventricular remodeling-related factor Foxp1, transforming growth factor β1 and endothelin 1 were detected by RT-PCR.
RESULTS AND CONCLUSION: Compared with the blank control group, the body mass of rats decreased and the heart mass increased in the exercise-related fatigue group (P < 0.05). Compared with the exercise-related fatigue group, the body mass and heart mass of the rats reduced in the exercise-related fatigue with resveratrol supplement group (P < 0.05). Compared with the blank control group, the levels of creatine kinase isoenzyme, cardiac troponin 1 and uncoupling protein 1 increased (P < 0.01), and the level of pyruvate dehydrogenase decreased (P < 0.01) in the exercise-related fatigue group. Compared with the exercise-related fatigue group, the levels of creatine kinase isoenzyme, myocardial troponin 1 and uncoupling protein 1 decreased (P < 0.05), and the level of pyruvate dehydrogenase increased (P < 0.05) in the exercise-related fatigue with resveratrol supplement group. Compared with the blank control group, the expression of the Foxp1 gene decreased (P < 0.01), and the expression of transforming growth factor β1 and endothelin 1 gene increased (P < 0.01) in the myocardium of the exercise-related fatigue group. Compared with the exercise-related fatigue group, the expression of the Foxp1 gene in the myocardium of the exercise-related fatigue with resveratrol supplement group increased (P < 0.01), while the expression of the transforming growth factor β1 and endothelin 1 gene decreased (P < 0.05). It is suggested that exercise-induced fatigue can promote myocardial adaptability and cause compensatory hypertrophy. Resveratrol can improve myocardial injury and energy metabolism and delay ventricular energy remodeling in rats. This effect may be related to the regulation of Foxp1/transforming growth factor β1/endothelin 1 signaling pathway.

Key words: resveratrol, exercise-related fatigue, myocardial fibrosis, ventricular remodeling, cardiac failure

CLC Number:

Zhang Libing, Xu Shang, Jin Qiguan, Hu Yulong. Action mechanism of resveratrol intervention on ventricular remodeling in exercise-induced fatigue rats[J]. Chinese Journal of Tissue Engineering Research, 2024, 28(16): 2587-2592.

Figures/Tables 4

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