一种严重的神经认知表型,由两个兄弟姐妹的双性CHD3变体引起
Racheli Goldfarb Yaacobi1, Rivka Sukenik Halevy1,2
1Genetics Institute, Meir Medical Center, Kfar Saba, Israel.
American journal of medical genetics. Part A
|December 20, 2023
概括
双性CHD3变体导致严重的神经发育综合征,与Snijders Blok-Campeau综合征不同. 这一发现扩大了对CHD3相关疾病及其遗传基础的理解.
科学领域:
- 遗传学 是一个遗传学.
- 神经发育障碍 神经发育障碍
- 分子生物学分子生物学
背景情况:
- 异卵性CHD3变体与Snijders Blok-Campeau综合征 (SBCS) 有关,这种综合征的特点是智力障碍,巨头症和异形特征.
- 大多数已知的致病变体都会影响CHD3.3的ATPase/helicase域.
研究的目的:
- 为了研究严重的精神障碍和智力障碍的兄弟姐妹中严重的神经认知表型的遗传基础.
- 描述与双性CHD3变异相关的临床和遗传发现.
主要方法:
- 在受影响的兄弟姐妹及其父母身上进行了整体外基因组测序.
- 变种分类是根据ACMG指南进行的.
主要成果:
- 两个兄弟姐妹呈现严重的智力障碍和深刻的异形,表现出同卵性双性CHD3变体 (c.5384_5389dup; p.Arg1796_Phe1797insTrpArg).
- 这种可能的致病变体是ATPase/helicase域外的框架内插入,从轻度受影响的父母中在异合状态下遗传.
- 该变种在受影响的兄弟姐妹中处于同卵性状态,在未受影响的兄弟姐妹中缺席,证实了其致病性.
结论:
- 双性CHD3变体可以导致严重的神经发育综合征,与SBCS不同.
- 特定的变异类型 (框架内插入) 和其位置可能会影响双基CHD3突变的表型结果.
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