老化人类大脑中的单细胞转录和基因组变化
Ailsa M Jeffries1, Tianxiong Yu2, Jennifer S Ziegenfuss1
1Department of Molecular, Cell and Cancer Biology, Genome Integrity Program, University of Massachusetts Chan Medical School, Worcester, MA, USA.
Nature
|September 3, 2025
概括
细胞损伤导致衰老. 这项研究揭示了人类前额叶皮层的基因表达和基因组变化,突出显示了大脑细胞的发育和衰老动态.
科学领域:
- 神经科学
- 基因组学
- 分子生物学
背景情况:
- 细胞损伤会随着年龄的增长而增加,
- 人的前额叶皮质与年龄相关的变化会影响认知功能.
研究的目的:
- 在整个生命周期中识别人类前额皮层的基因表达和基因组变化.
- 了解人类大脑发育和衰老的转录和基因组动态.
主要方法:
- 单核RNA测序 (snRNA-seq) 的方法
- 单细胞全基因组测序 (scWGS)
- 空间转录学
主要成果:
- 确定了具有神经发育基因表达的婴儿特异性细胞群.
- 在不同细胞类型中观察到与年龄相关的同位素基因下调.
- 发现神经元特定基因在一生中表达稳定.
- 检测到两种与年龄相关的突变特征与基因转录和抑制相关.
- 揭示了神经元中的基因长度和表达依赖的体质突变率.
结论:
- 提供关于人类大脑发育和衰老的见解.
- 阐明了人类一生中的转录和基因组变化.
- 将基因组变化与老年大脑的转录基因组联系起来.
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