抵抗运动训练对肺,心脏和肌肉结构和功能有好处,在患有稳定的肺动脉高血压的老鼠中
Leôncio Lopes Soares1, Luciano Bernardes Leite1, Luiz Otávio Guimarães Ervilha2
1Universidade Federal de Viçosa, Departamento de Educação Física, Viçosa, Brazil.
Life sciences
|September 28, 2023
概括
低到中等强度的阻力运动训练 (RT) 改善了肺动脉高血压 (PAH) 的老鼠的生存率和身体功能. 此外,RT还有利于肺部,右心室 (RV) 和骨肌肉组织,减轻不良重塑和保持心脏功能.
科学领域:
- 心血管生理学心血管生理学
- 肺高血压研究 肺高血压研究
- 运动科学 运动科学
背景情况:
- 肺动脉高血压 (PAH) 是一种严重的疾病,其特点是肺血管抵抗力增加和右心室 (RV) 功能障碍.
- 骨肌肉异常和氧化应激在PAH中很常见,导致运动能力降低和预后不佳.
- 抵抗运动训练 (RT) 对PAH复杂病理生理学的潜在益处仍然不完全理解.
研究的目的:
- 为了研究低到中等强度RT对肺,RV和骨肌肉结构和功能的影响,在稳定的PAH的老鼠模型中.
- 评估RT对PAH大鼠的生存,运动耐受性,心脏功能和组织重塑的影响.
主要方法:
- 雄性大鼠的稳定PAH诱导的单氨酸 (MCT) 进行了为期5周的RT计划 (爬梯,55-65%的强度).
- 评估了体力劳动耐受性和心声回声学参数.
- 使用组织学,单个肌细胞和生物化学方法分析了肺,心脏和双臂肌组织.
主要成果:
- RT显著提高了生存率和体力劳动耐受性 (最大承载载荷).
- RT减轻了肺动脉阻力,保留了RV心脏功能 (例如,分数缩短,射出分数),并抵消了氧化应激标志物.
- RT减弱了肺部 (气囊塌) 和骨肌肉 (缩,原沉积) 的不良改造,并延迟了RV的不良改造 (过度缩,纤维化).
结论:
- 低到中等强度的RT在稳定PAH的老鼠中对肺,RV和骨肌肉组织有显著的益处.
- RT改善整体存活率,运动能力和心脏功能,同时抵消与PAH相关的有害组织变化.
- 这些发现表明RT是管理PAH及其多器官并发症的潜在治疗策略.
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