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综合的奥米克分析澄清了不确定的意义的ATRX副本编号变体

Aren E Marshall¹, Yijing Liang², Madeline Couse²

¹Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, ON, K1H 5B2, Canada.

Journal of human genetics

|October 31, 2023

概括

发现导致ATR-X综合征的最小基因重复. 整合多种omics技术有助于诊断罕见疾病,突出突出新的遗传见解.

科学领域:

遗传学遗传学是一个
分子生物学分子生物学
罕见疾病罕见疾病

背景情况:

部分基因重复很难检测,常常是人类疾病的不充分报告的原因.
与X相关的主导ATRX变异会导致阿尔法血症/智力障碍综合征 (ATR-X综合征),这是一个异质性疾病.
ATR-X综合征表现为智力障碍,低血压,明显的面部特征,生殖器异常和α-thalassemia.

研究的目的:

报告引起疾病的最小的内基因ATRX重复.
为了证明整合多omics方法用于诊断罕见遗传疾病的实用性.
突出诊断挑战和检测部分基因重复的潜在解决方案.

主要方法:

全基因组测序用于初始变异检测.
RNA测序以评估基因表达和变异影响.
用于功能解释的DNA甲基化和信号分析.
临床遗传测试和患者表型.

主要成果:

在ATRX基因中发现了一种新的,半的,内基的~43.6kb的双重复制.
通过综合的奥米克分析,这种重复被证实是引起疾病的.
这代表了ATRX基因中报告的最小的与疾病相关的并联重复.

结论:

多omics集成对于诊断由具有挑战性的遗传变异引起的罕见疾病至关重要,例如小重复.
先进的基因组和表观基因组分析可以揭示以前未被确诊的遗传疾病.
这一案例扩大了已知的ATRX致病变体的范围,并强调了全面的遗传调查的重要性.

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