含有潜在增强元件的基因间序列通过调节PITX2来促进Axenfeld-Rieger综合征
Yizheng Jiang1, Yu Peng2, Qi Tian1
1MOE Key Laboratory of Rare Pediatric Diseases & Hunan Key Laboratory of Medical Genetics of the School of Life Sciences and.
JCI insight
|April 9, 2024
概括
在非编码DNA中发生的大量删除,称为LOH-1,扰乱了对似的家庭主体转录因子2 (PITX2) 调节,通过影响增强器活性,导致Axenfeld-Rieger综合征 (ARS).
科学领域:
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 阿克森菲尔德-里格综合征 (ARS) 是一种罕见的发育异常,具有遗传异质性.
- 非编码序列变异越来越多地与ARS有关,但它们的功能机制在很大程度上仍然未知.
研究的目的:
- 研究非编码变异在ARS病变发生中的功能和结构作用.
- 确定中国家庭ARS的遗传基础,并阐明潜在的分子机制.
主要方法:
- 在一个ARS受影响的家庭中进行了全基因组链接分析和全基因组测序.
- 使用CRISPR-Cas9基因编辑来创建LOH-1淘汰赛小鼠.
- 用RNA-Seq,实时定量PCR,ChIP-Seq和生物信息学分析来研究基因表达和调控元素.
主要成果:
- 在受影响的家族中,在PITX2和FAM241A之间确定了异构的570 kb删除 (LOH-1).
- LOH-1淘汰赛小鼠表现出ARS表型和减少PITX2表达.
- 在LOH-1中确定了一个功能增强器区域 (LOH-E1),通过与RAD21和凝聚素复合体结合来调节PITX2表达.
结论:
- 在LOH-1内的一种非编码增强器序列通过凝聚素介导的基因组循环远程调节PITX2的表达.
- 这种增强剂的破坏导致ARS,突出显示了非编码调控元素在发育障碍中的重要性.
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