在结直肠癌中,协调的巨细胞和T细胞相互作用调解了对检查点阻塞的反应
Guillaume Mestrallet1, Matthew Brown1, Natalie Vaninov2
1Division of Hematology and Oncology, Hess Center for Science & Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
bioRxiv : the preprint server for biology
|March 3, 2025
概括
不匹配修复缺陷 (MMRd) 的结肠直肠癌 (CRC) 通常会抵抗抗PD-1疗法. 结合针对特定免疫细胞的免疫疗法,在MMRd CRC中消除了瘤,并在MMRp CRC中改善了反应.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症研究 癌症研究
背景情况:
- 不匹配修复缺陷 (MMRd) 在结直肠癌 (CRC) 中很常见,但抗PD-1 治疗反应率低于最佳.
- 了解MMR和CRC中的免疫逃生机制对于提高免疫疗法疗效至关重要.
研究的目的:
- 确定关键的免疫细胞子集和相互作用,预测在MMRd CRC中对抗PD-1治疗的反应或抵抗.
- 探索组合免疫疗法策略,以克服MMRd和不匹配修复熟练 (MMRp) CRC中的免疫逃逸.
主要方法:
- 利用MMRd CRC的动物和人类模型来分析免疫细胞种群及其标记物.
- 研究了特定的巨细胞 (MHC+ C1Q+ CXCL9+) 和T细胞 (TCF+ BHLHE40+ PRF1+) 子集在抗PD-1治疗反应中的作用.
- 评估了与抗LAG3,抗CTLA4和抗TREM2疗法结合抗PD-1疗法的影响.
主要成果:
- 在抗PD-1疗法期间的MMRdCRC中的瘤控制与特定的巨细胞-T细胞相互作用相关.
- 耐药性与增加的T细胞耗尽标记 (TIM3,LAG3,TIGIT,PD-1) 和免疫抑制性髓状细胞 (TREM2+巨细胞,单细胞) 相关.
- 组合疗法 (抗PD-1 + 抗LAG3 / CTLA4 / TREM2) 在MMRdCRC中实现了100%的瘤根除,在MMRpCRC中超过70%.
结论:
- 确定了关键的T细胞和巨细胞子集,参与了CRC的免疫疗法反应和耐药性.
- 证明了组合免疫疗法的潜力,以克服MMRd和MMRpCRC的免疫逃生机制.
- 为针对特定免疫元件的新型治疗策略提供基础,以提高癌症免疫治疗结果.
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