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发育中的抑制性神经元的单细胞转录组图表揭示了扩张和收缩的多样化模式
Elia Micoli1,2,3, Facundo Ferrero Restelli1,2,3, Giulia Barbiera4
1VIB Center for Brain and Disease, 3000, Leuven, Belgium.
bioRxiv : the preprint server for biology
|March 3, 2025
概括
研究人员确定了大脑中索马托斯坦素表达 (SST+) 抑制神经元的三个不同的发育路径. 这项研究为了解皮层发育过程中神经元多样性的出现提供了一个新的框架.
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
- 计算生物学 计算生物学
背景情况:
- 大脑皮层利用各种抑制神经元进行计算.
- 了解抑制性神经元多样性的发育起源至关重要.
- 罕见的细胞类型通常在单细胞RNA测序 (scRNAseq) 数据中不足,阻碍了发育研究.
研究的目的:
- 开发一个计算管道,从scRNAseq数据集中丰富和整合罕见细胞类型.
- 在发育过程中构建一个全面的转录基因地图索马托斯坦素表达 (SST+) 抑制神经元.
- 阐明主要SST+抑制神经元亚型的独特发育轨迹.
主要方法:
- 开发了一个计算管道,以丰富和整合多个scRNAseq数据集中的罕见细胞类型.
- 将管道应用于小鼠皮质数据,创建了拥有超过51,000个SST+神经元的Dev-SST-Atlas.
- 分析了转录组数据,以识别和描述神经元亚型的不同发育轨迹.
主要成果:
- 确定了三个主要的SST+神经元组:马丁诺蒂细胞 (MCs),非马丁诺蒂细胞 (nMCs) 和远程投射神经元 (LRPs).
- MCs表现出早期的承诺和不变的多样化,nMCs表现出逐渐的多样化,LRPs表现出一种独特的"收缩"模式,具有编程细胞死亡.
- 在胎儿人类皮质中也发现了一种过渡性LRP类型,在出生后的第7天被消除,这表明进化保存.
结论:
- 建立了三个不同的SST+神经元多样化的模式:不变,扩张和收缩.
- Dev-SST-Atlas 为研究抑制性神经元发育提供了宝贵的资源.
- 这些发现为了解发育中的皮质中抑制性神经元多样性的出现提供了一个新的框架.
相关概念视频
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02:33Combinatorial Gene Control
Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
02:24Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...