一种基因型第一方法识别了NF1致病变异的高发病率,具有明显的疾病关联
Anton Safonov1,2, Tomoki T Nomakuchi3, Elizabeth Chao4
1Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
Nature communications
|April 1, 2025
概括
在NF1基因的致病变体比以前认为的更常见,影响1在1,286个个体. 许多病例涉及马赛克,并与癌症风险增加有关.
科学领域:
- 遗传学 遗传学 是一个
- 在瘤学瘤学.
- 医学遗传学 医学遗传学
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.
- 传统的患病率估计 (3000分之一) 基于先确定表型.
- NF1与特征性的身体发现和恶性瘤的显著增加风险有关.
研究的目的:
- 通过基因型优先方法确定NF1致病变异的流行率.
- 调查与偶然发现的NF1变体相关的临床表现和癌症风险.
主要方法:
- 使用基因型优先策略对大型患者队列 (超过100万个) 的分析.
- 对患有NF1变异的个体进行临床特征和癌症发病率的评估.
- 癌症发病率在变异携带者与对照人群之间的比较.
主要成果:
- 致病性NF1变异的患病率比之前估计的更高 (1在1,286).
- 大约一半的鉴定变体发生在没有经典NF1临床特征的个体中,往往是由于后阴囊性马赛克.
- 偶然发现的变种与典型的NF1特征无关,但与癌症发病率的增加有关.
结论:
- NF1病原型变种明显更常见,经常呈现体质马赛克主义和减少透性.
- 这些变异在超出经典NF1诊断的基础上,对一般人群的癌症风险有所贡献.
- 基因型优先方法对于了解遗传疾病的全谱和人口影响至关重要.
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