在老鼠海马中神经干细胞衰老的表观遗传调节通过Setd8下调调节
Shuzo Matsubara1, Kanae Matsuda-Ito1,2, Haruka Sekiryu1
1Stem Cell Biology and Medicine, Department of Stem Cell Biology and Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
The EMBO journal
|June 3, 2025
概括
衰老会损害大脑神经干细胞 (NSC),影响记忆力. 我们发现,酶Setd8对于维持NSC活动和预防海马体与年龄相关的记忆力下降至关重要.
科学领域:
- 神经科学是一个神经科学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 衰老研究研究 衰老研究
背景情况:
- 随着年龄的增长,神经干细胞 (NSC) 的下降会损害海马体的记忆力.
- 在海马体NSC中驱动早期衰老的表观遗传和转录机制尚未完全理解.
研究的目的:
- 为了研究长度变化在染色质可访问性和基因表达在海马NSCs在衰老期间.
- 确定负责与年龄相关的NSC功能障碍和记忆障碍的分子调节者.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 和单细胞ATAC测序 (scATAC-seq) 在小鼠海马NSC和不同发育阶段的神经元上使用.
- 综合数据分析被用来绘制染色质和转录组概况的变化.
- 通过耗尽研究评估了酶Setd8在NSC活动和记忆功能中的作用.
主要成果:
- 在海马体NSC及其后代从新生儿到成熟成人阶段观察到染色质和转录形状的持续变化.
- 鉴于与年龄相关的NSC变化的一个关键因素是基因组修饰酶Setd8 (负责H4K20me1) 的表达减少.
- Setd8 枯竭模仿了与年龄相关的表观遗传和基因表达变化,NSC活动受损,并导致海马体记忆缺陷.
结论:
- 这项研究提供了在大脑衰老期间染色质和转录组动态的全面地图.
- 减少Setd8表达是一种关键机制,是海马NSC活动和神经发生的早期开始下降的基础.
- 这些发现为与年龄相关的记忆障碍提供了机理性的见解,这是功能衰退之前的.
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