EPISODE · May 27, 2026 · 23 MIN
1036-衰老对神经元蛋白质组稳态与小胶质细胞的影响
from 聊聊Sci
这项研究通过开发新型生物正交技术（BONCAT），揭示了大脑衰老过程中神经元蛋白质组稳态失调的机制。研究发现，老年小鼠神经元中的蛋白质半衰期比年轻个体延长了约一倍，这种降解速度的减慢在不同脑区表现出显著的地域差异性。科学家编纂了包含一千多种蛋白质的神经元“聚集组”，证实这些难以清除的蛋白质积聚与降解效率下降密切相关。此外，研究还观察到小胶质细胞在衰老过程中会大量吞噬并累积源自神经元的突触蛋白。这种突触蛋白周转障碍与免疫细胞累积的现象，可能是导致认知能力下降及神经退行性疾病的关键驱动因素。这些发现为理解大脑退化提供了全新的分子视角和潜在的治疗靶点。References:Guldner I H, Wagner V P, Moran-Losada P, et al. Ageing promotes microglial accumulation of slow-degrading synaptic proteins[J]. Nature, 2026: 1-12.前往小宇宙评论区与主播互动
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1036-衰老对神经元蛋白质组稳态与小胶质细胞的影响
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