从年轻到老:模仿来自年轻捐赠者的直接转换的神经元中的神经元衰老
Nimmy Varghese1,2, Amandine Grimm1,2,3, M Zameel Cader4
1Research Cluster Molecular and Cognitive Neurosciences, University of Basel, 4002 Basel, Switzerland.
Cells
|August 9, 2024
概括
这项研究开发了一种使用年轻人神经元进行神经元衰老的新体外模型. 轮的暴露有效地模仿了与年龄相关的线粒体功能障碍,超过了皮质醇压力.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 开发精确的体外模型来研究人类大脑衰老至关重要.
- 来自纤维细胞的诱导神经元 (iNs) 是有前途的,但与老年捐赠者有局限性.
- 压力是体内衰老过程的潜在触发因素.
研究的目的:
- 使用年轻诱导神经元 (iN) 建立一个体外神经元衰老模型.
- 研究压力 (皮质醇) 和线粒体压力 (轮) 对神经元衰老的影响.
- 确定一种可靠的方法来模拟体内与衰老相关的线粒体功能障碍.
主要方法:
- 年轻人纤维细胞被转化为诱导神经元 (iN).
- 年轻的IN被急性暴露于皮质醇或轮 (线粒体复合物I抑制剂).
- 分析了线粒体的生物能量特性,包括呼吸,ATP水平,线粒体膜潜力 (MMP),糖解,线粒体超氧化物和活性氧物种 (ROS).
主要成果:
- 轮的暴露诱导了线粒体呼吸,细胞ATP和MMP中与衰老相关的显著缺陷.
- 轮治疗增加了糖解,线粒体超氧化物和线粒体ROS水平.
- 皮质醇部分诱导了线粒体功能障碍,而轮在活体中复制衰老相关的线粒体损伤方面表现出优势.
结论:
- 急性轮暴露是一种优越的方法,用于创建年轻诱导神经元中与衰老相关的线粒体功能障碍的体外模型.
- 这项研究介绍了第一个使用应激诱导在年轻人中的方法,以重建与衰老相关的线粒体损伤.
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