结合体质突变和转录组分析,揭示了人类皮层中克隆结构的区域特异性差异.
Vinayak V Viswanadham1, Sonia N Kim2, Emre Caglayan3
1Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA; Bioinformatics and Integrative Genomics Program, Harvard Medical School, Boston, MA, USA.
Cell reports
|November 15, 2025
概括
人类大脑发育揭示了独特的细胞谱系模式. 研究人员在超过72,000个细胞中绘制了体质单核酸变体 (sSNVs),发现了克隆分散和神经元类型晚 divergence 的区域差异.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 基因组学就是基因组学.
背景情况:
- 人类大脑皮层表现出区域专业化,但细胞系在形成这种变异和神经元细胞类型在发育过程中的分布方面的作用尚不清楚.
- 研究人类皮层发育需要追踪细胞起源及其空间分布的方法.
研究的目的:
- 在人类皮层区域内绘制单细胞系谱,并识别神经元亚型.
- 了解细胞系如何促进人类大脑发育中的区域变异和神经元多样性.
主要方法:
- 利用了从深批量全基因组测序中识别的1000多种体质单核酸变体 (sSNV).
- 分析了超过25个皮层区域和超过72,000个单细胞的sSNVs.
- 进行了单核sSNV和全转录组分析.
主要成果:
- 在前端-双侧皮质中,sSNVs表现出有限的限制,产生神经元的克隆分散到相邻区域.
- 初级视觉皮层含有比二级视觉皮层多30%-70%的sSNV,在这个边界的克隆表现出有限的分散,这表明晚期的血统分离.
- 谷氨基基神经元克隆显示了适度的区域限制,并与一些GABAergic神经元共享低马赛克的sSNVs,表明最近的背皮层祖先.
结论:
- 这项研究揭示了皮质谱系发展的人类特异性模式.
- 在人类大脑皮层中观察到克隆模式的显著区域差异.
- 证据表明,一些谷氨酸和GABAergic神经元系之间存在较晚的分歧.
相关概念视频
Cancers Originate from Somatic Mutations in a Single Cell
14.5K
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
14.5K
Somatosensory, Motor, and Association Cortex
2.2K
The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
2.2K


