端粒延长的生殖线变异倾向于发生综合征性乳头类甲状腺癌亚型
Emily A DeBoy1, Anna M Nicosia2, Sandya Liyanarachchi3
1Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Medical Scientist Training Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Telomere Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
American journal of human genetics
|April 30, 2024
概括
POT1,TINF2和ACD基因的遗传变异与乳头甲状腺癌 (PTC) 和超长端粒有关. 这些变体增加癌症风险,可能表明可识别的长端粒综合征.
科学领域:
- 遗传学 是一个遗传学.
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 乳头甲状腺癌 (PTC) 是最常见的内分泌恶性瘤,其中10-15%显示出家族聚类.
- 导致家族性PTC风险的遗传因素在很大程度上是未知的.
- 以前的研究将POT1变体和超长端粒与PTC联系起来.
研究的目的:
- 研究POT1和其他端粒维护基因变异在家族PTC敏感性中的作用.
- 确定这些变异是否与超长端粒和其他癌症有关.
主要方法:
- 对470个个体 (家族和未经选择的PTC病例) 的遗传分析,用于POT1,TINF2,ACD和其他端粒维护基因的变异.
- 测量具有鉴定变异的个体的端粒长度.
- 在变体载体中分析癌症史.
- 瘤测序以识别瘤驱动因素和端粒维护机制.
主要成果:
- 在4.5%的家族病例和1.5%的非选择PTC病例中发现了POT1,TINF2和ACD的致病变体.
- 这些变异的个体表现出超长的端粒长度和其他癌症 (黑色素瘤,淋巴瘤,肉瘤) 的高发病率.
- BRAF p.Val600Glu是PTC瘤中唯一的致癌驱动因素,没有观察到获得的端粒维护机制.
结论:
- 在POT1,TINF2和ACD中的生殖系变异定义了带有端粒延长的PTC综合征子集.
- 这些变体通过绕过获得的端粒维护的需要来降低癌症值.
- 这些发现表明,与特定癌症类型相关的临床上可识别的长端粒综合征.
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