一个细胞类型意识框架,用于指定孟德尔调节障碍中的非编码变异
Arthur S Lee1,2,3,4, Lauren J Ayers5, Michael Kosicki6
1Department of Neurology, Boston Children's Hospital and Harvard Medical School, Boston, MA, USA. arthur.lee@childrens.harvard.edu.
Nature communications
|September 27, 2024
概括
研究人员开发了一种新的单细胞多基因框架,以识别先天性脑失神障碍 (CCDD) 的非编码变异. 这种方法有助于在缺少编码变异的情况下发现罕见疾病的遗传原因.
科学领域:
- 基因组学就是基因组学.
- 发展生物学 发展生物学
- 神经科学是一个神经科学.
背景情况:
- 未解决的孟德尔病常常缺乏病原性编码变体,这表明可能涉及非编码区域.
- 先天性头骨神经衰竭障碍 (CCDD) 是一组影响头骨运动神经元发育的孟德尔病.
研究的目的:
- 开发一个单细胞多原子框架,以识别头骨运动神经元 (cMN) 中的 cis 调节元件.
- 在未解决的CCDD案件中提名候选非编码变体.
- 建立一个可通用的框架,用于发现其他门德尔乱中的非编码变体.
主要方法:
- 在胚胎小鼠模型中进行了集成的单细胞染色质可访问性,基因突变修饰和基因表达试验.
- 产生了大约86,000个cMN和相关细胞类型的单细胞表观基因组概况.
- 使用体内转基因检测验证了增强剂活性,并将cMN图谱应用于未解决的CCDD谱系的全基因组序列.
主要成果:
- 确定了大约25万个可访问的监管元素和145,000个假定增强剂.
- 验证了75%的测试元素,证明单细胞可访问性预测增强剂活性.
- 提名的候选非编码变异调节已知的CCDD基因 (MAFB,PHOX2A,CHN1,EBF3) 和在反复突变增强剂中发现的变异.
结论:
- 这项研究为发现CCDD中非编码变体提供了一个强大的框架.
- 这些发现突显了在门德尔乱中非编码调节元件的重要性.
- 开发的方法适用于更广泛的遗传疾病.
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