中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (16): 2587-2592.doi: 10.12307/2024.284

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

白藜芦醇干预运动性疲劳大鼠心室重构的作用机制

章立冰,徐  尚,金其贯,胡玉龙   

  1. 扬州大学体育学院,江苏省扬州市  225000
  • 收稿日期:2023-02-27 接受日期:2023-04-08 出版日期:2024-06-08 发布日期:2023-07-31
  • 通讯作者: 胡玉龙,博士,副教授,扬州大学体育学院,江苏省扬州市 225500
  • 作者简介:章立冰,男,1996年生,江苏省苏州市人,汉族,扬州大学在读硕士,主要从事体育保健与康复方面的研究。
  • 基金资助:
    2016年度国家重点研发计划项目(2016YFD0400603-02),项目负责人:金其贯

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

Zhang Libing, Xu Shang, Jin Qiguan, Hu Yulong   

  1. College of Physical Education, Yangzhou University, Yangzhou 225000, Jiangsu Province, China
  • Received:2023-02-27 Accepted:2023-04-08 Online:2024-06-08 Published:2023-07-31
  • Contact: Hu Yulong, PhD, Associate professor, College of Physical Education, Yangzhou University, Yangzhou 225000, Jiangsu Province, China
  • About author:Zhang Libing, Master candidate, College of Physical Education, Yangzhou University, Yangzhou 225000, Jiangsu Province, China
  • Supported by:
    2016 National Key Research & Development Program of China, No. 2016YFD0400603-02 (to JQG)

摘要:


文题释义:

内皮素1:是心肌肥厚中重要的自分泌和旁分泌调节因子,主要在心室重构过程中产生,能够收缩血管、诱发炎症,且与室性心律失常有关。
心室重构:是指各种损伤使心脏原来存在的物质和心脏形态学发生变化,是机体的一种适应性反应,是病变修复和心室整体代偿及继发的病理生理反应过程,表现为心肌变厚、心室容量增大、心脏形状改变等。


背景:研究表明白藜芦醇具有缓解运动性疲劳并保护心脏的作用,但其作用机制有待深入研究。

目的:探讨白藜芦醇对运动性疲劳大鼠心室重构的保护作用与调控机制。
方法:采用随机数字表法将48只雄性SD大鼠分为4组,每组12只:空白对照组大鼠常规饲养;适应性训练1周后,运动性疲劳组和运动性疲劳+白藜芦醇组大鼠进行6周的负荷游泳训练(尾部固定5%体质量铅块,70%-80%最大摄氧量强度),每周6 d,每天60 min,运动后1 h,白藜芦醇组、运动性疲劳+白藜芦醇组灌胃给予50 mg/(kg·d)的白藜芦醇溶液,空白对照组、运动性疲劳组灌胃给予等量的2%二甲基亚砜溶液,每周6 d,每天1次,持续6周。末次干预24 h后,称量大鼠体质量及心脏质量,采用ELISA法检测大鼠血浆肌酸激酶同工酶、心肌肌钙蛋白1及心肌组织中丙酮酸脱氢酶及解偶联蛋白1水平,RT-PCR检测心肌组织心室重构相关因子Foxp1、转化生长因子β1及内皮素1基因表达水平。

结果与结论:①与空白对照组比较,运动性疲劳组大鼠体质量减少、心脏质量增加(P < 0.05);与运动性疲劳组比较,运动性疲劳+白藜芦醇组大鼠体质量与心脏质量均减少(P < 0.05);②与空白对照组比较,运动性疲劳组肌酸激酶同工酶、心肌肌钙蛋白1及解偶联蛋白1水平升高(P < 0.01),丙酮酸脱氢酶水平降低(P < 0.01);与运动性疲劳组比较,运动性疲劳+白藜芦醇组肌酸激酶同工酶、心肌肌钙蛋白1及解偶联蛋白1水平降低(P < 0.05),丙酮酸脱氢酶水平升高(P < 0.05);③与空白对照组比较,运动性疲劳组大鼠心肌组织中Foxp1基因表达降低(P < 0.01),转化生长因子β1及内皮素1基因表达升高(P < 0.01);与运动性疲劳组比较,运动性疲劳+白藜芦醇组大鼠心肌组织中Foxp1基因表达升高(P < 0.01),转化生长因子β1及内皮素1基因表达降低(P < 0.05);④结果显示,运动性疲劳促使心肌发生适应性改变,造成代偿性肥厚;白藜芦醇对运动性疲劳造成的大鼠心肌损伤和能量代谢具有改善作用,可延缓心室能量重构,且该作用可能与调控Foxp1/转化生长因子β1/内皮素1信号通路有关。

https://orcid.org/0009-0007-8313-5777(章立冰)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 白藜芦醇, 运动性疲劳, 心肌纤维化, 心室重构, 心力衰竭

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

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