删除MAB21L2的上游突出了进化保存的非编码序列对眼睛发育的重要性
Fabiola Ceroni1,2, Munevver B Cicekdal3,4,5, Richard Holt1
1Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, UK.
Nature communications
|October 25, 2024
概括
在MAB21L2附近的遗传变异会导致眼,微眼和结肠瘤 (AMC). 在MAB21L2上游的删除中,非编码元素会影响眼睛的发育,为AMC提供新的诊断见解.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 眼科医生 眼科 眼科
背景情况:
- 无眼症,微眼症和大眼瘤 (AMC) 是发育性眼睛障碍,导致儿童显著的视力障碍.
- 非编码的调节序列与疾病有关,但它们在AMC中的作用尚不清楚.
- MAB21L2变种是已知的AMC的原因之一.
研究的目的:
- 调查MAB21L2中或附近的变体在AMC表型中的作用.
- 描述非编码监管要素对眼睛发育和AMC的贡献.
- 确定AMC的新型遗传原因.
主要方法:
- 在MAB21L2.2.附近变异的家族中进行分离分析.
- 保存的非编码元素 (CEs) 的in silico分析.
- 斑马鱼和Xenopus tropicalis模型用于研究删除效应和CE功能.
- ChIP-seq用于识别与CEs结合的蛋白质.
主要成果:
- 在MAB21L2中确定了一个错误的变异,在一个家族中与AMC分离.
- 在另一个患有AMC.的个体中,MAB21L2上游的大量删除具有特征.
- 证明在MAB21L2附近删除保存元素 (CE13,CE14) 会导致动物模型中的眼睛和中脑异常.
- 表明Otx2与CE13和CE14结合,这表明它具有监管作用.
结论:
- 在MAB21L2或附近的基因变异有助于AMC.
- 非编码的保存元素在调节眼睛发育所必需的基因中起着至关重要的作用.
- 非编码序列是AMC遗传诊断的重要来源.
- 这项研究提供了关于眼睛发育的调节机制的见解.
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