新的CTNNB1基因突变揭示了儿科肝母细胞瘤的关键病原机制
Sourabh Kumar1, Jyoti Sharma1, Himani Pandey2
1Department of Paediatric Surgery, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, 110029, India.
Pediatric surgery international
|July 27, 2025
概括
肝母细胞瘤经常涉及CTNNB1基因突变,特别是在第3个外形,影响Wnt/β-catenin通路. 这些遗传变异为个性化儿科癌症治疗提供了潜在的生物标志物.
科学领域:
- 儿科瘤学 儿科瘤学
- 癌症基因组学 癌症基因组学
- 分子病理学分子病理学
背景情况:
- 肝母细胞瘤 (HB) 是最常见的儿科肝癌.
- 在高达90%的HB病例中发现了Wnt/β-catenin信号通路的改变.
- 编码β-catenin的CTNNB1基因是该途径的核心,但其突变谱需要详细的表征.
研究的目的:
- 分析和表征CTNNB1基因在多种肝细胞母细胞瘤患者队列中的遗传变异.
- 了解已识别的CTNNB1突变的潜在致病机制.
主要方法:
- 54个肝细胞母细胞瘤样本的整体外体序列.
- 使用GATK/Mutect2进行变体调用,并通过多个数据库进行注释.
- 使用cBioPortal,CONSURF 3.0,STRING和VarElect进行CTNNB1变异的分析.
主要成果:
- 在88.9%的患者中检测到CTNNB1突变,发现了21种独特的变异.
- 异构3是一个突变热点,在91.66%的突变阳性病例中存在17种独特突变.
- 常见的变体包括p.Gly34Val,p.Ser33Phe和p.Ser33Tyr;在S29和I35中发现了新的突变.
结论:
- 在肝细胞母细胞瘤中存在显著的CTNNB1遗传变异,这证实了外原3是关键的突变部位.
- 这些发现加深了对肝细胞瘤病原体和Wnt/β-catenin通路的理解.
- CTNNB1突变可以作为诊断/预后生物标志物,用于儿童肝母细胞瘤个性化治疗.
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