单细胞多基因组分析揭示了合作转录因子,用于对寡细胞的基因调节
bioRxiv : the preprint server for biology
|July 1, 2024
概括
这项研究揭示了转录因子 (TFs) 如何合作调节脑健康的关键细胞 - - 寡干细胞中的基因表达. 像SOX10-OLIG2这样的关键TF对被确定为对寡细胞功能和分化至关重要的.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 骨髓质细胞是负责髓化的中枢神经系统细胞.
- 寡细胞基因的失调与各种大脑疾病有关.
- 转录因子 (TF) 在寡头细胞基因调节中的合作机制尚不清楚.
研究的目的:
- 确定合作型TFs,共同调节基因 (TG) 在寡头细胞中的表达.
- 阐明TFs在寡细胞功能和分化中的调控作用.
- 探索遗传变异对TF介导的基因调节在寡头细胞的影响.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 和使用测序 (scATAC-seq) 数据对转化酶可访问染色质的单细胞测试的整合.
- 开发一个深度学习模型,以基于TF表达水平来预测TG表达.
- 使用Shapley相互作用值来计算TF重要性和TF-TF相互作用得分.
- 实验验证使用ChIP-seq数据进行联合丰富分析.
主要成果:
- 在特定于寡头细胞的监管区域中确定了具有重叠结合点的共同结合TF对.
- 发现已知重要的TF对用于寡基细胞分化,如SOX10-TCF12,SOX10-MYRF和SOX10-OLIG2,具有显著更高的监管重要性 (沙普利分数).
- 在调节区域内发现了153个与寡类细胞相关的eQTL,将遗传变异与TF调节基因 (eGenes) 联系起来.
- 经过实验验证的TF对如SOX10-OLIG2和SOX10-NKX2.2.
结论:
- 合作性TF相互作用在调节寡细胞基因表达和分化方面发挥着重要作用.
- 已识别的TF对和调控机制提供了对寡细胞功能的洞察.
- 特定于寡头细胞的调节元件中的遗传变异可能通过改变的TF介导基因调节影响大脑健康.
更多相关视频
09:05Generation of Oligodendrocytes and Oligodendrocyte-Conditioned Medium for Co-Culture Experiments
Published on: February 9, 2020
10.5K
10:53Generation of Human Neurons and Oligodendrocytes from Pluripotent Stem Cells for Modeling Neuron-Oligodendrocyte Interactions
Published on: November 9, 2020
4.7K
相关概念视频
General Transcription Factors
5.2K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
5.2K
Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
Cooperative Binding of Transcription Regulators
6.4K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
6.4K
Combinatorial Gene Control
8.3K
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...
8.3K
Regulation of Expression at Multiple Steps
889
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
889
Transcription Factors
75.8K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
75.8K
