EPISODE · Jan 30, 2026 · 17 MIN
449-机械力敏感通道TMEM63A调控髓鞘几何结构与轴突感知
from 聊聊Sci
这项研究揭示了TMEM63A作为一种关键的机械敏感性离子通道，在少突胶质细胞感知轴突直径并调节髓鞘形成过程中起着核心作用。实验表明，这种通道能将物理压力转化为钙离子信号，从而精确控制髓鞘的长度和厚度。当该基因发生缺失或突变时，会导致神经传导速度下降、髓鞘发育不良以及步态协调等运动功能障碍。通过单细胞测序和成像分析，研究者发现该过程涉及MYO5A蛋白对髓鞘碱性蛋白mRNA的定向运输。该成果不仅阐明了中枢神经系统细胞间通讯的复杂机制，也为理解罕见遗传性白质脑病（如HLD19）的病理生理学提供了科学依据。这项跨物种研究涵盖了从分子机制到动物行为的完整链条，强调了机械力感知在脑发育中的关键价值。 References: Dereddi R R, Djannatian M, Fiore F, et al. Oligodendrocyte mechanotransduction channel TMEM63A regulates myelin sheath geometry[J]. Neuron, 2026. 前往小宇宙评论区与主播互动
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