通过WES再分析确定一个患有MTSS2导致智力障碍的中国患者:一个病例报告
Duan Li1, Wen Zhang1, Huifen Mei1
1Department of Genetics and Endocrinology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou, China.
Frontiers in psychiatry
|February 5, 2026
概括
带有眼睛异常和独特面部特征的智力发育障碍 (IDDOF) 是一种罕见的遗传性疾病. 重新分析整个外基因组测序数据发现了一个新患者,并突出显示了一个特定的MTSS2基因变异作为潜在的热点.
科学领域:
- 遗传学 遗传学 是一个
- 罕见疾病 罕见疾病
- 神经发育障碍 神经发育障碍
背景情况:
- 带有眼睛异常和独特面部特征的智力发育障碍 (IDDOF) 是一种极其罕见的自体主导性疾病.
- 它是由MTSS2基因的致病变体引起的,以前在全球仅报告了10例病例.
- IDDOF的遗传基础和表型谱需要进一步阐明.
研究的目的:
- 报告一个新的中国患者被诊断出IDDOF,将全球病例数扩大到11.
- 重新评估整个外因组测序 (WES) 数据,以识别以前负面病例中的致病变体.
- 调查MTSS2基因在IDDOF中的作用,并确定潜在的突变热点.
主要方法:
- 在患者身上进行了整体外体序列 (WES) 测序.
- 2021年最初的WES数据分析没有给出诊断结果.
- 在2024年重新分析WES数据时,发现了一种致病性MTSS2基因变异 (c.2011C>T(p.Arg671Trp)).
主要成果:
- 确定了一名新的IDDOF的中国患者,出现了小头症,独特的面部特征,,眼科和听觉发现,低血压,精神运动延迟,智力障碍和行为问题.
- 在WES数据的重新分析中,在MTSS2基因中发现了一个新的异性致病变体,c.2011C>T(p.Arg671Trp).
- 这种在2022年之前报告的变种被认为是IDDOF的热点.
结论:
- 这项研究增加了一名新患者,并扩大了IDDOF的表型描述.
- 证实MTSS2基因变异c.2011C>T(p.Arg671Trp) 是IDDOF的一个重要原因.
- 重新分析WES数据对于改善罕见遗传疾病的诊断产量至关重要,特别是发现新的基因疾病关联.
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