EPISODE · Jul 21, 2026 · 14 MIN
1314-主要神经退行性疾病中TOP1介导的神经基因组损伤模式
from 聊聊Sci
该研究利用单细胞全全基因组测序技术，深入探讨了肌萎缩侧索硬化症 (ALS)、额颞叶痴呆 (FTD) 和阿尔茨海默病 (AD) 患者神经元中的遗传损伤。研究人员发现，这三种主要的神经退行性疾病共享一种特定的体细胞突变模式，即显著增加的2碱基对缺失。这种损伤被证实是由拓扑异构酶1 (TOP1) 介导的异常诱变引起的，通常与氧化应激诱发的DNA损伤密切相关。值得注意的是，这种基因组不稳定性在病变大脑的小脑区域并不存在。这一发现揭示了不同病理特征的神经退行性疾病背后存在共同的分子机制，为理解神经元死亡提供了新视角。References:Zhou Z, Luquette L J, Dong G, et al. Recurrent patterns of TOP1-mediated neuronal genomic damage shared by major neurodegenerative disorders[J]. Cell, 2026.前往小宇宙评论区与主播互动
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1314-主要神经退行性疾病中TOP1介导的神经基因组损伤模式
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