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免疫检查点抑制剂用于POLE或POLD1校对缺陷的转移性结直肠癌
M Ambrosini1, B Rousseau2, P Manca3
1Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
概括
转移性结直肠癌 (mCRC) 与POLE/D1校对缺陷 (POLE/D1pd) 显示,与不匹配修复缺陷 (dMMR) /微卫星不稳定性高 (MSI-H) mCRC相比,免疫检查点抑制剂 (ICI) 的反应和生存率更高. 这些发现突出了POLE/D1pd作为ICI治疗的潜在预测生物标志物.
科学领域:
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
- 免疫治疗是一种免疫疗法.
背景情况:
- 波尔/D1校对缺陷 (POLE/D1pd) 是一种罕见的,超突变的转移性结直肠癌 (mCRC) 的亚型.
- 关于POLE/D1pd mCRC中免疫检查点抑制剂 (ICI) 疗效的数据有限,与不匹配修复缺陷 (dMMR) /微卫星不稳定性高 (MSI-H) mCRC的未知比较结果.
研究的目的:
- 研究ICI在POLE/D1pd mCRC.患者中的活性和有效性.
- 为了比较用ICI治疗的POLE/D1pd mCRC与dMMR/MSI-H mCRC患者队列的结局.
主要方法:
- 一项全球性研究收集了27名POLE/D1pd mCRC患者的数据,这些患者接受了抗PD-L1 +/- 抗CTLA-4药物治疗.
- 分析了临床病理学,基因组学,反应和生存数据,并与610名接受ICI治疗的dMMR/MSI-H mCRC患者进行了比较.
- 在7241个CRC中进行的基因组分析确定了POLE/D1pd分子概况和突变特征.
主要成果:
- 波尔/D1pd mCRC 患者表现出不同的特征,包括年龄较小,男性性别较少,驱动突变较少,以及右侧瘤.
- 与dMMR/MSI-H mCRC相比,POLE/D1pd mCRC的整体应答率 (89%对54%) 和无进展生存率 (HR=0.24) 显著更高.
- 多变量分析证实,POLE/D1pd mCRC的PFS (HR=0.17) 和OS (HR=0.24) 显著改善,与较高的瘤突变负担 (TMB) 相关.
结论:
- 患有POLE/D1pd mCRC的患者在ICI治疗中经历了更有利的结果,包括增强瘤反应和生存率.
- POLE/D1pd与免疫检查点抑制剂在转移性结直肠癌中提高疗效有关.
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