缺少Gdap1的iPSC衍生的运动神经元的快速退化引发了线粒体维持的先天免疫反应
Marian León1, Javier Prieto1,2, María Micaela Molina-Navarro1
1Departamento Biología Celular, Biología Funcional y Antropología Física, Universitat de València, Burjassot, 46100, València, Spain.
Cell death discovery
|July 1, 2023
概括
失去GDAP1会导致运动神经元通过还原-炎症轴退化,突出显示了夏科特-玛丽-图斯病的潜在治疗点.
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
- 遗传学 遗传学 是一个
背景情况:
- 查洛-玛丽-牙病 (CMT) 是一种遗传性神经病变,具有复杂的遗传起源.
- 编码线粒体蛋白质的GDAP1基因与CMT有关,但其精确的细胞功能尚不清楚.
- GDAP1突变导致运动神经元和施万细胞功能障碍.
研究的目的:
- 通过使用来自小鼠的诱导多能干细胞模型,研究GDAP1功能丧失的分子和细胞后果.
- 阐明GDAP1缺陷运动神经元中神经退行的细胞表型和潜在机制.
主要方法:
- 从Gdap1淘汰赛小鼠模型中生成诱导多能干细胞 (iPSCs).
- 将iPSCs分化为运动神经元,用于表型分析.
- 评估线粒体形态,自,新陈代谢,活性氧物种 (ROS) 和免疫反应.
主要成果:
- 在Gdap1-null运动神经元中,线粒体碎片化增加,自/线粒体碎片化增强,以及新陈代谢改变 (降低糖解,增加OXPHOS).
- 观察到ROS水平升高和线粒体膜潜能,以及p38 MAP激酶通路和先天免疫反应的激活.
- 这些发现揭示了由线粒体功能障碍驱动的氧化还原-炎症轴,在没有GDAP1.1的情况下.
结论:
- 由于GDAP1缺乏,导致脆弱的运动神经元容易因氧化还原-炎症轴导致退化.
- 在这个模型中,改变线粒体代谢和增加氧化应激是神经退行的主要驱动因素.
- 识别的轴呈现了开发CMT新型组合治疗的潜在治疗目标.
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