患有DDX3X-相关智力障碍的女孩的丹迪-沃克尔形
Karima Rafat1, Mohamed S Abdel-Hamid2, Ghada M H Abdel-Salam1
1Clinical Genetics Department, Human Genetics and Genome Research Institute, National Research Centre, Cairo, Egypt.
Molecular syndromology
|December 7, 2023
概括
在一个患有严重智力障碍和独特先天性异常的儿童身上,发现了DDX3X基因中的新型de novo missense变异. 这扩大了对DDX3X相关疾病的理解.
科学领域:
- 遗传学 遗传学 是一个
- 神经学 神经学
- 发展生物学 发展生物学
背景情况:
- 知识障碍 (ID) 和神经发育障碍通常与遗传因素有关.
- DDX3X基因在神经元发育和基因调节中起着至关重要的作用.
- 在DDX3X中发生的突变是已知的智力障碍的原因,主要是女性.
研究的目的:
- 报告一个与DDX3X相关的智力障碍的新案例,具有不寻常的先天性异常.
- 鉴定具有新型DDX3X变异的患者的表型和基因型.
- 扩大DDX3X相关疾病的基因型和表型谱.
主要方法:
- 进行全外体测序 (WES),以确定遗传原因.
- 临床评估包括评估神经发育状态,体检和神经成像.
- 现型特征与已识别的遗传变异相关.
主要成果:
- 在DDX3X基因中发现了一个新的误解变异 (c.976C>T; p.Arg326Cys).
- 该患者呈现出严重的智力障碍,自闭症特征,关节过松,渐进的脊椎病变和先天性隔膜.
- 大脑核磁共振扫描显示了体低发性,心室隆起,多微性,低可塑性子和丹迪-沃克形.
结论:
- 确定的DDX3X变种与复杂的神经发育障碍有关.
- 先天性隔膜是DDX3X相关疾病的一个新发现的潜在特征.
- 这一案例加强了DDX3X误解变异的基因型-表型相关性,并扩大了对其相关特征的理解.
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