TP53生殖基因检测和遗传性癌症:身体事件和临床标准如何影响变体检测率
Paula Rofes1,2,3, Carmen Castillo-Manzano2,4, Mireia Menéndez1,2,3
1Hereditary Cancer Group, Oncobell Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Av. Gran Via 199-203, L'Hospitalet del Llobregat, 08908, Spain.
Genome medicine
|January 14, 2025
概括
生殖系TP53致病变体 (PVs) 导致遗传TP53相关癌症综合征 (hTP53rc). 这项研究发现,29%的TP53PV携带者不符合LFS标准,强调需要更广泛的测试和更新的临床指南,包括肺癌.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 医学诊断 医学诊断 医学诊断
背景情况:
- 在TP53中的生殖线异构致病变体 (PVs) 导致Li-Fraumeni综合征 (LFS),增加癌症风险.
- 随着临床标准的不断变化和多基因小组测试,可以识别超越经典LFS表型的TP53PV载体,从而更广泛地定义了遗传性TP53相关癌症综合征 (hTP53rc).
- 解释生殖系TP53变体是复杂的,因为变体多样性,可变的透率,体质马赛克,和参与不确定的潜力 (CHIP) 的克隆血液形成.
研究的目的:
- 评估TP53变异解释挑战在日常实践中的诊断相关性和影响.
- 评估现有的Li-Fraumeni综合征 (LFS) 临床标准在识别具有遗传TP53相关癌症综合征 (hTP53rc) 的个体中的敏感性.
主要方法:
- 在6161名怀疑患有遗传性癌症的患者中分析了TP53,根据LFS/Chompret标准,早期发病的乳腺/结肠直肠癌或没有暗示性标准分类.
- 在不符合LFS/Chompret标准或具有低变异异基因频率 (VAF) 的个体中进行TP53 PVs的辅助测试.
主要成果:
- 在45个试验者中发现了TP53的PV;72%是宪法,10%是马赛克,18%是与CHIP相关的.
- 29%的生殖系TP53PV携带者不符合任何LFS临床标准.
- 考普雷特2009标准显示灵敏度 (68%) 比考普雷特2015标准 (54%) 高,这表明包括肺癌的重要性.
结论:
- TP53辅助测试对于识别马赛克和CHIP相关的PV至关重要,特别是在不符合LFS标准的患者中,无论VAF如何.
- 对hTP53rc的临床标准应包括肺癌诊断,以提高灵敏度.
- 更广泛的TP53测试和更新的标准对于准确诊断遗传TP53相关癌症综合征至关重要.
关键词:
这就是TP53的特点.克隆性血液形成 (clonal hematopoiesis) 是一种血液形成的过程.遗传性癌症是一种遗传性癌症.遗传性TP53相关的癌症综合征李 - 弗劳梅尼综合征马赛主义 (Mosaicism) 是一个教派.更多相关视频
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