Nat Commun:懒癌福利——不运动也健康,新运动激素能让老年体能翻倍!

2021-02-19 MedSci原创 MedSci原创

利用MOTS-c有望帮助老年人更长久地保持健康状况,解决许多年龄相关的疾病。

还记得小时候动画片中的大力水手吗?那个靠吃菠菜就能秒变力大无穷同时抱得美人归的水手不知道是多少小朋友年幼时的偶像。那时,我们的父母总告诉我们,这一神奇的事情只能在动画片中存在而不能实现。

然而,最近发表在《自然》旗下杂志Nature Communications上的新研究却让这一理想变成了现实。来自美国南加州大学的科学家们找到了一种人体在运动过程会分泌的一种叫做MOTS-c的运动激素,后者注射入小鼠体内后不仅可以改善小鼠健康,而且体能翻倍!

代谢稳态的逐渐丧失是衰老的标志,它阻碍了身体机能并最终降低了体能。事实上,老龄化是许多非传染性慢性病的主要风险因素。机体健康需要对不断变化的内外环境做出持续的适应性细胞应激反应。

其中,线粒体不仅产生大量的细胞能量,而且通过与细胞核和其他亚细胞区动态沟通来协调适应性细胞内环境稳定。MOTS-c的表达与年龄有关,在包括骨骼肌在内的多种组织和循环中均可检测到,因此也被称为“线粒体激素”或“有丝分裂素”。

在该研究中,研究人员全面探索了MOTS-c在人体和小鼠中的作用。首先,研究人员在志愿者运动一段时间后,检测到骨骼肌和血液中的MOTS-c含量都显著增加。随后,将MOTS-c注射到不同年龄段的小鼠体内。

结果显示,不论是年轻(2个月)、中年(12个月)和老年(22个月)小鼠,MOTS-c注射后体能测试结果都优于同龄小鼠。其中,老年鼠体力得到了明显的改善,抓地力、步态和步行能力都明显提高。

为此,该研究的通讯作者Changhan David Lee教授说:“这些老年小鼠的年龄相当于人类65岁以上,它们接受治疗后,跑步能力加强了一倍,甚至超过了未接受治疗的中年小鼠。”

综上,尽管这种方法应用于人体之前还需要做很多工作,但研究人员认为这些数据表明,利用MOTS-c有望帮助老年人更长久地保持健康状况,解决许多年龄相关的疾病。

 

参考文献:

Reynolds JC, et al. MOTS-c is an exercise-induced mitochondrial-encoded regulator of age-dependent physical decline and muscle homeostasis. Nat Commun. 2021 Jan 20;12(1):470. doi: 10.1038/s41467-020-20790-0.

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