基因伪基因倒置作为遗传性缺失的隐藏来源
Ilaria Quartesan1, Stefano Facchini1,2, Arianna Manini3
1Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK.
medRxiv : the preprint server for health sciences
|November 24, 2025
概括
以前未被发现的基因伪基因逆转是夏科特-玛丽-图斯神经病变的重要原因. 长读测序揭示了这些结构变异有助于遗传疾病.
科学领域:
- 基因组学就是基因组学.
- 人类遗传学 人类遗传学
- 分子生物学分子生物学
背景情况:
- 伪基因是丰富的基因组元素,通常被认为是非功能性的.
- 越来越多的证据表明伪基因在人类疾病中起作用.
- 基因伪基因安排可以促进基因组的重组,如反转.
研究的目的:
- 为了识别容易发生逆转的基因伪基因对.
- 研究这些逆转在人类疾病中的作用,特别是夏科特-玛丽-牙 (CMT) 神经病变.
- 评估长读序列 (LRS) 的诊断实用性,以检测这些变体.
主要方法:
- 全基因组查以识别面向相反的基因伪基因对.
- 分析1000个基因组项目长读测序 (LRS) 数据的分析.
- 在CMT患者中研究涉及SORD基因及其伪基因SORD2P的逆转.
- 与染色质接触数据 (Micro-C) 的相关性分析.
主要成果:
- 确定了411个基因伪基因对,46个与疾病有关,3.6%的健康个体携带反转.
- 在9%的SORD-CMT患者中发现了SORD和SORD2P之间的反复逆转,解释了以前未知的致病性等位基因.
- 发现与染色质接触的基因伪基因对更容易发生反转.
结论:
- 基因伪基因逆转代表了一类未被认可的致病性结构变异.
- 对于检测这些反转来说,LRS至关重要,因为短读序列错过了这些反转.
- 这些发现可能有助于解释孟德尔病缺失的遗传性.
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