在人类大脑区域之间结合基因特异性转录因子提供了对eQTLs的机械洞察力
Ashlyn G Anderson1,2, Belle A Moyers1, Jacob M Loupe1
1HudsonAlpha Institute for Biotechnology, Huntsville, Alabama 35806, USA.
Genome research
|August 16, 2024
概括
遗传变异显著影响人类大脑中的转录因子 (TF) 结合. 研究人员确定了成千上万的等位基因特异性结合变异,为基因调节提供了洞察力.
科学领域:
- 基因组学就是基因组学.
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 转录因子 (TFs) 通过与特定的DNA序列结合来控制基因表达.
- 遗传变异可以改变TF-DNA相互作用,并随后影响基因调节.
- 了解遗传变异如何影响大脑中的TF结合对于研究神经功能和疾病至关重要.
研究的目的:
- 识别影响人类大脑组织中转录因子结合的遗传变异.
- 描述大脑中等位基特定结合 (ASB) 的性质和频率.
- 探索ASB,TF结合动机和基因表达之间的关系.
主要方法:
- 评估了来自两个捐赠者的9个大脑区域中的94个TFs的异构体变体的基因特异结合 (ASB).
- 利用图谱基因组和ChIP-seq数据来比较单基因之间的TF结合.
- 分析了 ASB 在捐赠者内部和捐赠者之间的可再生性.
主要成果:
- 在至少一个TF中,确定了数千种表现出异位基因特异结合 (ASB) 的变异.
- 发现罕见的等位基因通常会减少TF结合,而常见的等位基因具有可变的效果.
- 观察到,预测结合基因中的ASB变异有利于具有更强的基因匹配的等位基因,除了高度占用位置.
- 发现神经元特异性cIS调节元件 (cCREs) 的ASB变异数量比寡细胞特异性cCREs少.
- 使用GTEx数据将2670种ASB变异与大脑中的等位基因特异性基因表达联系起来.
结论:
- 这项研究提供了对人类大脑中异位基因特异性TF结合变体的全面资源.
- 这些发现提供了对遗传变异如何影响神经组织中基因调节的机制性见解.
- 鉴定到的ASB变体及其与基因表达的关联可以促进对大脑功能和疾病的研究.
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