家庭传说,一个不确定的意义的变体,和偶然
Rhys Duarte1, Liesbeth Vossaert1,2, Sandra A Darilek1,3
1Department of Molecular and Human Genetics, Baylor College of Medicine, Texas, USA.
概括
一个罕见的NOTCH3基因变异,最初的意义不确定,在一个患有严重症状的婴儿中被确定. 这种变种被重新归类为可能致病的,这解释了婴儿的病情和其他家庭健康问题.
科学领域:
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
- 神经学 神经学
背景情况:
- 婴儿可能会出现严重的,令人困惑的症状,需要广泛的诊断工作.
- 遗传因素经常被考虑,但初步评估可能并不总是指向明确的遗传病因.
- 三元外体序列测序是诊断罕见和复杂儿科疾病的强大工具.
研究的目的:
- 调查婴儿严重疾病的根本原因.
- 评估基因变异,特别是NOTCH3基因在婴儿表现中的作用.
- 根据临床和家族病史数据,重新评估不确定的意义 (VUS) 的变异.
主要方法:
- 婴儿的临床稳定.
- 三元外基因组测序 (父母和婴儿).
- 对NOTCH3基因对父性遗传变异的分析.
- 遗传发现与婴儿的症状和家族病史的相关性.
- 文献审查和专家合作用于变种重新分类.
主要成果:
- 在婴儿中鉴定不确定的意义 (VUS) 的父亲遗传的NOTCH3变异.
- 婴儿的症状 (血,表,胃) 与典型的CADASIL表现不一致.
- 家庭史显示,父亲的亲戚患有发作和情绪障碍.
- 在综合数据的基础上将NOTCH3 VUS重新归类为可能致病的.
- 为家庭的症状星座提出了一个统一的诊断.
结论:
- NOTCH3基因可以表现出超出经典CADASIL的非典型表型.
- 三元外基因组测序与彻底的家族史分析相结合,对于诊断复杂的遗传疾病至关重要.
- 对VUS的重新分类对于准确的诊断和遗传咨询至关重要.
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