首页> 美国卫生研究院文献>Antioxidants >Balanced Intense Exercise Training Induces Atrial Oxidative Stress Counterbalanced by the Antioxidant System and Atrial Hypertrophy That Is Not Associated with Pathological Remodeling or Arrhythmogenicity
【2h】

Balanced Intense Exercise Training Induces Atrial Oxidative Stress Counterbalanced by the Antioxidant System and Atrial Hypertrophy That Is Not Associated with Pathological Remodeling or Arrhythmogenicity

机译:平衡的强烈运动训练诱导抗氧化系统和心房肥大的心房氧化应激与病理重塑或心血发生不相关

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Although regular exercise training is associated with cardiovascular benefits, the increased risk of atrial arrhythmias has been observed after vigorous exercise and has been related to oxidative stress. We aimed at investigating exercise-induced atrial remodeling in a rat model of an athlete’s heart and determining sex-specific differences. Age-matched young adult rats were divided into female exercised, female control, male exercised, and male control groups. After exercised animals completed a 12-week-long swim training protocol, echocardiography and in vivo cardiac electrophysiologic investigation were performed. Additionally, atrial histological and gene expression analyses were carried out. Post-mortem atrial weight data and histological examination confirmed marked atrial hypertrophy. We found increased atrial gene expression of antioxidant enzymes along with increased nitro-oxidative stress. No gene expression alteration was found regarding markers of pathological remodeling, apoptotic, proinflammatoric, and profibrotic processes. Exercise training was associated with a prolonged right atrial effective refractory period. We could not induce arrhythmias by programmed stimulation in any groups. We found decreased expression of potassium channels. Female gender was associated with lower profibrotic expression and collagen density. Long-term, balanced exercise training-induced atrial hypertrophy is not associated with harmful electrical remodeling, and no inflammatory or profibrotic response was observed in the atrium of exercised rats.
机译:虽然常规运动培训与心血管益处有关,但在剧烈运动后已经观察到心间心律失常的风险增加,并且与氧化应激有关。我们旨在在运动员心脏大鼠模型中调查运动诱导的心房重塑,并确定性别特异性差异。年龄匹配的年轻成年大鼠分为女性行使,女性对照,男性行使和男性对照组。服用动物完成后,完成了12周的游泳训练协议,对超声心动图和体内心脏电生理调查进行。另外,进行心房组织学和基因表达分析。验尸性心房重量数据和组织学检查证实了明显的心房肥大。我们发现抗氧化酶的心房基因表达增加以及硝基氧化胁迫增加。没有发现基因表达改变,关于病理重塑,凋亡,促血症和平面凝血过程的标志物。运动培训与长期右间房有效的难治期有关。我们不能通过任何群体的编程刺激诱导心律失常。我们发现钾通道的表达减少了。女性性别与较低的血压表达和胶原密度有关。长期,平衡的运动训练诱导的心房肥大与有害电气重塑无关,并且在肌肉大鼠胞质中没有观察到炎症或尖锐反应。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号