核突瘤的分子表征:来自核突瘤注册表的报告
Justin J Kim1, Sara A Walton1, Navin R Mahadevan2
1Dana-Farber Cancer Institute, Boston, MA, United States.
概括
标准DNA测序错过了大多数NUT癌症 (NC) 病例. 对于诊断这种罕见的癌症至关重要的是RNA融合测试或NUT免疫组织化学/FISH.
科学领域:
- 在瘤学瘤学.
- 遗传学 遗传学 是一个
- 分子诊断学 分子诊断
背景情况:
- 核突瘤 (NUT carcinoma,简称NC) 是一种侵袭性,诊断不足的状细胞癌,其特征是NUTM1基因融合.
- 癌基因驱动瘤基因转录,特别是MYC,导致其预后不佳,平均存活时间为6.7个月.
- 准确及时诊断对于有效管理这种罕见恶性瘤至关重要.
研究的目的:
- 评估标准下一代测序 (NGS) 在NC中检测NUTM1融合的有效性.
- 为了确定额外的分子变化和NC.同时发生的突变.
- 为了比较NC的不同分子测试方法的诊断产量.
主要方法:
- 广泛的NGS (DNA,ctDNA,RNA融合) 在2013-2024年间对116名NC患者进行.
- 为了全面分析,NGS报告和医疗记录被手动审查.
- 对比了DNA/ctDNA NGS,RNA融合测序,NUT免疫组织化学 (IHC) 和NUTM1 FISH的诊断性能.
主要成果:
- 标准DNANGS检测到NUTM1融合仅在21.6%的测试NC病例中.
- 基于RNA的融合测试实现了83.9%的检测率,而NUT IHC和NUTM1 FISH分别是100%和91.9%的敏感度.
- 常见的改变途径包括表观遗传调节 (57.0%),细胞周期 (26.0%) 和DNA修复 (24.0%),同时发生PIK3CA,RET,FGFR3,ATM和BRCA1.1的突变.
结论:
- 标准的DNA NGS不足以诊断NUT癌症;应经常使用基于RNA的测试或NUT IHC/FISH.
- NC在表观遗传,细胞循环和DNA修复途径中经常出现变化.
- 对这些同时发生的变化的进一步研究可能会揭示NC的新型治疗点.
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