在SMARCA1中,致病变体会导致由NURF复杂组成调节的X链接神经发育障碍
David Picketts1, Ghayda Mirzaa2, Keqin Yan1
1Ottawa Hospital Research Institute.
Research square
|October 16, 2023
概括
在SMARCA1的致病变体导致一种新的神经发育障碍 (NDD),其特点是智力障碍和言语迟缓. 这一发现突出了NURF复杂性的发现.
科学领域:
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 依赖ATP的染色体重塑蛋白中的致病变体与神经发育障碍 (NDD) 有关.
- 核细胞重塑因子 (NURF) 复合体,包括BPTF和SNF2H (SMARCA5) 或SNF2L (SMARCA1),对于染色体重塑至关重要.
- 之前的研究表明,在NDD中,BPTF和SMARCA5的病原变异与NDD有关.
研究的目的:
- 识别和描述NDDs的新型遗传原因.
- 研究SMARCA1基因在神经发育中的作用.
- 探索与SMARCA1变异相关的临床谱.
主要方法:
- 描述了来自30个家庭的40个患有新发病或从母亲遗传的致病性SMARCA1变异的个体.
- 分析了临床表型,包括智力障碍 (ID) /发育迟缓 (DD),言语发育和面部异形.
- 检查了SMARCA1功能丧失变体的个体的全基因组DNA甲基化概况和大脑症.
- 利用Smarca1,Smarca5和Bptf单双小鼠淘汰对NURF复合体和前脑发育的遗传剖析.
主要成果:
- 确定了一种与致病性SMARCA1变异相关的新型NDD.
- 在受影响的个体中观察到轻度至重度的ID/DD,言语延迟或回归,以及复发的面部形状障碍.
- 在具有SMARCA1功能丧失变体的个体中发现了温和的全基因组DNA甲基化概况和高透率的大脑.
- 通过小鼠模型证明了NURF复杂成分和剂量对前脑发育的重要性.
结论:
- 在SMARCA1中的致病变体代表了神经发育障碍的新发现的原因.
- SMARCA1变异与一个独特的临床表型有关,包括ID/DD,言语障碍和大脑症.
- 不同NURF复合组件的变化可以导致具有广泛临床谱的NDD,这强调了复合物在神经发育中的作用.
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