1180-阿兹海默症韧性中的小胶质细胞转化与病理拐点 episode artwork

EPISODE · Jun 24, 2026 · 19 MIN

1180-阿兹海默症韧性中的小胶质细胞转化与病理拐点

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这项研究通过结合空间转录组学与单核RNA测序技术,深入探讨了阿尔茨海默病(AD)中微胶质细胞在应对淀粉样蛋白-β(Aβ)与tau蛋白时的状态演变。研究人员在八旬老人和百岁老人大脑的额叶皮层中识别出六个不同的组织域,揭示了病理演变中存在一个关键的拐点:即从早期受Aβ驱动的炎症程序(early PIGs)转向后期由tau蛋白诱发的抗原呈递程序(late PIGs)。研究发现,认知韧性与这种微胶质细胞状态的转换密切相关:不伴随痴呆的八旬老人仅表现出早期反应,而认知完好的百岁老人虽然启动了后期程序,却表现出与tau蛋白积累脱钩的特征。该成果将微胶质细胞在Aβ-tau界面的转换定位为疾病干预的潜在靶点,为理解大脑如何抵御神经退行性病变提供了新视角。References:Lu A, Chen W T, Dalby M, et al. Human microglial transitions at the Aβ–tau inflection point associate with divergent pathways to dementia and resilience[J]. Nature Medicine, 2026: 1-13.前往小宇宙评论区与主播互动

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1180-阿兹海默症韧性中的小胶质细胞转化与病理拐点

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