一种基因型第一方法识别出高发病率的NF1致病变体与明显的疾病关联
medRxiv : the preprint server for health sciences
|August 23, 2023
概括
在NF1基因的致病变体比以前认为的更常见,影响1在450-750个体. 许多病例涉及马赛克和减少透性,但仍然增加癌症风险.
科学领域:
- 遗传学 遗传学 是一个
- 在瘤学瘤学.
- 神经科学是一个神经科学.
背景情况:
- 神经纤维素瘤类型1 (NF1) 是一种遗传性疾病,由NF1基因中的功能丧失变异引起.
- 它已知患病率为3000分之一,与癌症风险增加有关.
- 目前的理解依赖于表型首先确定.
研究的目的:
- 使用基因型优先方法调查NF1致病变体的流行率.
- 为了识别那些缺乏经典临床特征的NF1变异个体.
- 评估偶然发现的NF1变体与癌症风险之间的关联.
主要方法:
- 使用基因型优先策略对两个大型患者队列的分析.
- 鉴定和描述NF1致病变体的鉴定和特征.
- 在具有偶然变异的个体与对照人群之间的癌症发病率的比较.
主要成果:
- 致病性NF1变异的患病率高于此前估计的 (450-750人中的1人).
- 大约一半的鉴定变异是在没有临床NF1特征的个体中,通常是由于体质马赛克主义.
- 偶然的NF1变异与恶性瘤发病率的增加有关.
结论:
- NF1的致病变体明显更常见,经常表现出体质的马赛克主义和减少的透性.
- 这些变异在一般人群中导致癌症风险,即使没有经典的NF1表型.
- 基因型第一方法揭示了NF1变异影响的更广泛的范围.
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