关于EPA和DHA对老化相关的老鼠肉症的不同影响以及可能涉及的机制
Zi-Jian Wu1,2, Ying-Chao Li2, Yan Zheng3
1Research Center of Translational Medicine, Jinan Central Hospital, Shandong University, No. 105 Jiefang Road, Jinan, Shandong, 250013, China. dulei@sdu.edu.cn.
Food & function
|December 20, 2024
概括
埃可萨氨酸 (EPA) 和多可萨氨酸 (DHA) 补充剂改善了与衰老相关的肌肉损失. 与DHA相比,EPA在增强肌肉力量,质量和线粒体功能方面表现出优越的效果.
科学领域:
- 老年学和营养科学研究
- 骨肌肉生理学 骨肌肉生理学
- 分子生物学分子生物学
背景情况:
- 麻症是一种常见的与衰老相关的疾病,严重影响老年人的健康.
- 欧米茄-3多不和脂肪酸显示出对皮病的保护作用,但EPA和DHA的不同作用尚未完全理解.
研究的目的:
- 调查EPA和DHA对与衰老相关的肉症的差异性影响.
- 阐明EPA和DHA在缓解肉症的基础分子机制.
主要方法:
- 雄性C57BL/6J小鼠 (2个月和18个月大) 被食1%的EPA或1%的DHA饮食24周.
- 评估了握力的强度,骨肌肉质量,肌纤维大小,氧化应激,蛋白质周转,肌体发生,亡和线粒体功能.
主要成果:
- 在老年小鼠中,EPA和DHA都改善了肌肉强度,质量和肌纤维大小,EPA显示出更大的有效性.
- 通过调节关键信号通路 (FoxO3a,NF-κB,PI3K/Akt/mTOR,MyoD),EPA表现出卓越的抗氧化活性,增强了蛋白质循环和肌体生成.
- 通过调节线粒体生物发生,融合/裂变动态和线粒体衰变,EPA更有效地抑制了亡并改善了线粒体损伤.
结论:
- 在对抗与衰老相关的肉症方面,EPA比DHA更有效.
- 美国环保署的好处来自于优越的ROS清理,改善的蛋白质循环,增强的肌体生成,以及更好的线粒体质量控制.
- 美国环保署的机制涉及调节关键的细胞通路和线粒体动力学,为肉类症提供了一个有前途的治疗策略.
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