在有或没有有状多症综合征的患者中,RNF43的生殖系病原体变异
Heidi Hesselø Brinch1, Anna Byrjalsen2, Zuzana Lohse3
1Department of Clinical Genetics, Copenhagen University Hospital, Copenhagen, Denmark.
Familial cancer
|November 15, 2024
概括
RNF43中的致病变体与状多综合征 (SPS) 有关,但这项研究发现透率远低于预期. 许多携带RNF43变异的携带者没有出现多,使结直肠癌风险的遗传咨询复杂化.
科学领域:
- 遗传学 是一个遗传学.
- 胃肠病学 胃肠病学
- 在瘤学瘤学.
背景情况:
- 状多综合征 (SPS) 涉及许多状多体和增加结直肠癌 (CRC) 风险.
- RNF43基因变异与SPS病例的一个子集有关,但它们的透率和表型谱不清楚.
研究的目的:
- 调查RNF43基因中可能存在致病变体 (LPV) 的个体的透率和临床表现.
- 评估RNF43变体与状多综合征 (SPS) 或结直肠癌 (CRC) 之间的关联.
主要方法:
- 使用定制下一代测序 (NGS) 基因面板进行遗传测试,包括RNF43.3.
- 分析了来自四个家庭的八名怀疑遗传性癌症和RNF43LPVs的患者.
- 结果与有关RNF43变体和相关表型的现有文献进行比较.
主要成果:
- 在四个家族中确定了三个不同的RNF43LPV (一个删除,两个无意义变体).
- 只有一个家庭表现出CRC和状息肉的病史;其他三个家庭没有多或CRC的病史.
- 来自没有多发性病史的家庭的试验者进行的结肠镜检查显示,即使在老年人中,也没有状息肉或CRC.
结论:
- 与RNF43相关的疾病的透率明显低于此前估计的.
- 由于可变的表达性,RNF43变体与SPS/CRC之间的直接联系需要进一步调查.
- 对RNF43阳性家庭的遗传咨询,特别是那些没有多重症的家庭,是复杂的,需要仔细考虑这些发现.
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