935-肌肉源性miR-126调节ALS模型中TDP-43合成与神经肌肉接头完整性 episode artwork

EPISODE · May 8, 2026 · 16 MIN

935-肌肉源性miR-126调节ALS模型中TDP-43合成与神经肌肉接头完整性

from 聊聊Sci

这项研究揭示了肌萎缩侧索硬化症(ALS)中一种此前未知的致病机制,即肌肉与运动神经元之间的跨细胞通讯异常。研究发现,健康肌肉通过分泌含有miR-126a-5p的胞外囊泡来抑制轴突内TDP-43蛋白的局部合成。在ALS模型中,这种微小RNA的减少导致TDP-43在神经肌肉接头(NMJ)处异常积累并形成病理凝聚物,进而阻碍蛋白质翻译并诱发神经退行。实验表明,重新引入这种特定的微小RNA能够延缓小鼠的运动能力衰退并保护神经功能。这一发现不仅明确了离远端轴突局部翻译在疾病中的作用,也为ALS的早期干预提供了潜在的神经保护治疗方案。References:Ionescu A, Ankol L, Ganapathy Subramaniam A, et al. Muscle-derived miR-126 regulates TDP-43 axonal local synthesis and NMJ integrity in ALS models[J]. Nature Neuroscience, 2025, 28(11): 2201-2216.前往小宇宙评论区与主播互动

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935-肌肉源性miR-126调节ALS模型中TDP-43合成与神经肌肉接头完整性

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