摘要
背景:骨骼肌减少症是一种进行性和广泛性骨骼肌疾病,其特征为肌肉无力、肌肉质量损失和发力能力下降。衰老会导致肌肉减少症。已经评估了几种治疗策略来预防或减轻这种疾病。其中之一是血管紧张素1-7 [Ang-(1-7)],这是一种抗骨骼肌萎缩的肽,可以调节多种原因导致的肌肉质量下降,包括衰老。另一种调节肌肉质量和功能的是穿心莲内酯,它是一种双环二萜内酯,可降低核因子kappa B (NF-κB)信号,并减轻某些肌肉疾病的严重程度。 目的:探讨Ang-(1-7)联合穿心莲内酯对衰老性肌肉减少小鼠运动性能、肌力和纤维直径的影响。 方法:老年雄性C57BL/6J小鼠分别给予穿心莲内酯、Ang-(1-7)或联合用药3个月。测量他们的身体表现、肌肉力量和纤维直径。 结果:结果显示老年小鼠(24个月大)经Ang-(1-7)或穿心莲内酯治疗后,与未接受治疗的老年小鼠相比,其跑步机测试表现、肌肉力量和纤维直径均有所改善。Ang-(1-7)与穿心莲内酯联合给药对老年小鼠的身体性能、肌肉力量和纤维直径有增强的协同作用。 结论:我们的结果表明穿心莲内酯和Ang-(1-7)对老龄小鼠肌肉功能、力量和纤维直径的影响增强。
关键词: 肌少症,肾素-血管紧张素系统,虚弱,身体表现,肌肉功能,血管紧张素-(1-7)。
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