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探索胃腺癌与肠芽细胞分化的恶性潜力的分子特征
Yong Wang1, Xiyin Wei2, Bin Ke3
1Department of Pathology, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
Histopathology
|June 25, 2023
概括
胃腺癌与肠芽细胞分化 (GAED) 显示出侵略性行为和独特的分子特征. 这种罕见的癌症可以用抗HER2疗法和免疫检查点抑制剂向治疗.
科学领域:
- 胃肠病学 胃肠病学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 胃腺癌与肠芽细胞分化 (GAED) 是一种罕见的,侵袭性亚型的产生α-fetoprotein (AFP) 的胃癌.
- 对GAED恶性潜力的分子基础尚未完全理解.
研究的目的:
- 调查GAED的临床病理特征和分子特征.
- 为了确定GAED的潜在治疗点.
主要方法:
- 从37名GAED患者的临床病理学数据分析.
- 评估HER2表达,EBV编码的RNA,不匹配修复 (MMR) 状态,p53突变和编程细胞死亡配体1 (PD-L1) 的表达.
- 下一代测序 (NGS) 用于基因突变和表达概况.
主要成果:
- GAED表现出比传统的胃腺癌更深的壁透和更频繁的血管入侵.
- 远程转移仅在GAED病例中观察到.
- 关键的分子发现包括HER2阳性 (24.32%),TP53突变,PD-L1阳性 (65%的CPS≥5),以及没有EBV或MMR缺乏.
- 在GAED中,NGS发现了TOPI,ELOA和NOTCH3中的独特突变,在肝细胞癌,腺体发育和胃癌途径中具有丰富性.
结论:
- 在GAED的恶性瘤中,HER2+/EBV-/MSS/TP53+/PD-L1+和与肝细胞癌相关的途径的分子谱具有重要意义.
- 抗HER2疗法和免疫检查点抑制剂代表GAED有前途的治疗策略.
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