克劳丁18.2:在胆道癌症和胆道癌症中是一个有希望的可操作的目标
V Angerilli1, D Sacchi2, M Rizzato3
1Department of Medicine (DIMED), University of Padua, Padua, Italy; Surgical Pathology Unit, Azienda ULSS2, Marca Trevigiana, Treviso, Italy.
ESMO open
|April 11, 2025
概括
克劳丁18.2 (CLDN18.2) 是表达在胆道癌 (BTCs) 的一个子集,特别是胆囊和肝外胆管癌. 这表明CLDN18.2可能是这些BTC的潜在治疗目标.
科学领域:
- 在瘤学瘤学.
- 胃肠病学 胃肠病学
- 分子病理学分子病理学
背景情况:
- 抗克劳丁18.2 (抗CLDN18.2) 治疗已批准用于CLDN18阳性胃和胃食道结腺癌.
- 在胆道癌 (BTCs) 中CLDN18的表达并未得到很好的描述.
研究的目的:
- 为了评估CLDN18在病理特征BTCs的大队伍中的表达.
- 确定CLDN18作为BTC中的治疗点的潜力.
主要方法:
- 总共采集了237个BTC样本,并使用免疫组织化学分析了CLDN18状态.
- CLDN18阳性被定义为≥75%的瘤细胞具有中度至强度的膜色彩.
主要成果:
- 在29.5%的BTC中观察到CLDN18表达.
- 胆囊癌 (GBC) 和肝外胆管癌 (eCCA) 与肝内胆管癌 (iCCA; 12.9%) 相比,显著更高的CLDN18表达率 (分别为62.5%和53.4%).
- 在5.5%的BTC中发现了CLDN18阳性,GBC (15.6%) 和eCCA (8.6%) 的比率高于iCCA (2.0%). 在ICCA中,大通道亚型表现出比小通道亚型更高的CLDN18表达和阳性.
结论:
- CLDN18以BTC子集表示,在GBC和eCCA中具有显著的流行.
- 在iCCA中,CLDN18的表达在大管子类型中更频繁,并且与IDH1或FGFR2状态无关.
- CLDN18代表了BTC的潜在治疗标,需要进一步的临床研究.
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