耳部形是由层次增强器集群中的副本数变化驱动的,而主导增强器则回顾了人类病原体的产生
Xiaopeng Xu1,2,3, Qi Chen4, Qingpei Huang1
1Guangzhou National Laboratory, Guangzhou, 510320, Guangdong, China.
Nature communications
|May 17, 2025
概括
在副本数变异中发现的一种新型增强器集群 (PI-HEC) 调节HMX1表达,导致双边收缩耳 (BCE) 形. 这项研究揭示了哺乳动物耳朵发育和疾病的关键机制.
科学领域:
- 发展生物学 发展生物学
- 遗传学 遗传学是一种遗传学.
- 分子生物学分子生物学
背景情况:
- 增强剂和转录因子 (TFs) 控制基因表达的空间特异性和水平,与疾病相关的异常.
- 虽然HMX1增强剂与耳部形有关,但双边收缩耳部 (BCE) 的确切机制仍然难以捉摸.
研究的目的:
- 为了确定双边狭窄耳朵 (BCE) 背后的遗传和调节机制.
- 阐明增强剂在哺乳动物耳朵形态发生过程中调节HMX1表达中的作用.
主要方法:
- 识别含有新增增强器集群 (PI-HEC) 的副本数变异 (CNV).
- 增强剂活性,位置和TF结合动机的分析 (HMG-box,协调者,家庭主体).
- 利用小鼠模型研究HMX1表达变化及其对外耳发育的影响.
主要成果:
- 一种含有三种增强剂的CNV,称为PI-HEC,被确定为BCE的驱动因素.
- 每个增强器都表现出独特的活动位置结构特征,其中一个主导增强器由特定的TF图案调制.
- 在小鼠模型中异常的HMX1表达扰乱了外耳的发育,影响了软骨,肌肉和表皮.
结论:
- PI-HEC在协调HMX1表达以促进正常耳朵发育方面发挥着至关重要的作用.
- 增强剂之间的协同相互作用以及增强剂和TF之间的协同相互作用对于哺乳动物耳朵形态发生是至关重要的.
- 这项研究提供了对耳部形和复杂基因调节的遗传基础的见解.
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