在泛TRK免疫阳性非分化脂类瘤中,NTRK放大经常发生
Zoltán Lippai1, Gergő Papp1, Károly Szuhai2
1Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary.
Pathology oncology research : POR
|January 22, 2025
概括
神经缩型氨酸激酶受体 (NTRK) 基因放大经常在脂类瘤中发现,这表明TRK抑制治疗中可能发挥作用. 全TRK抗体检测可以帮助识别这些变化.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 神经缩型氨酸激酶受体 (NTRK) 基因融合是致癌的,有针对性的治疗方法可用.
- 泛TRK抗体是检测NTRK基因变异的工具,尽管其与非融合变异的联系研究不足.
- 之前的研究已经在一小部分具有特定突变的脂质瘤病例中发现了NTRK1放大.
研究的目的:
- 为了研究NTRK基因放大在非分化的脂类瘤中的频率.
- 通过FISH检测到的NTRK基因变异与泛TRK免疫阳性相关联.
- 评估NTRK基因组局部放大在更广泛的脂瘤瘤队列中的流行率.
主要方法:
- 在132个不分化的脂瘤瘤病例上进行了泛TRK免疫组织化学检查.
- 对NTRK1-2-3进行分离光 in situ杂交 (FISH) 对泛TRK阳性病例进行了研究.
- 分析了265个脂瘤样本 (差异化和不差异化) 的公开数据.
主要成果:
- 在76%的非分化脂类瘤中观察到全TRK免疫阳性.
- 没有一个泛TRK阳性病例显示出最终的NTRK基因融合;然而,28%的患者表现出基因放大,10%的患者患有多体症.
- 发现泛TRK免疫反应的程度与FISH的NTRK状态之间存在显著的正相关性 (p = 0.002).
- 对更大的队列的分析显示,在8.6%的脂类瘤中,相互排斥的NTRK基因组局部放大.
结论:
- 在脂肪肉瘤中,NTRK基因放大经常发生,独立于融合.
- 全TRK抗体阳性与NTRK变化相关,包括放大.
- 这些发现突显了NTRK放大在TRK抑制治疗中对脂质肉瘤患者的潜在意义.
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