TREM2 缺乏重新编程肠道巨细胞和微生物群,以增强抗PD-1 瘤免疫疗法
Blanda Di Luccia1,2, Martina Molgora1, Darya Khantakova1
1Department of Pathology and Immunology, Washington University School of Medicine in Saint Louis, St. Louis, MO 63110, USA.
Science immunology
|May 17, 2024
概括
缺乏巨细胞受体TREM2的小鼠表现出增强的抗PD-1瘤消除. 这与肠道细菌Ruminococcus gnavus有关,这表明它可能是一种益生菌,可以提高抗PD-1疗法的有效性.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 在瘤学瘤学.
背景情况:
- 与瘤相关的巨细胞 (TAM) 和肠道微生物群影响抗编程细胞死亡蛋白1 (PD-1) 治疗.
- 调节巨细胞受体TREM2会影响瘤生长和抗PD-1反应.
研究的目的:
- 研究TREM2缺乏在抗PD-1治疗反应中的作用.
- 探索TREM2,肠道微生物群和肠道免疫在抗PD-1封锁中的相互作用.
主要方法:
- 使用 TREM2 缺乏和抗PD-1 治疗的小鼠模型.
- 分析了肠道巨细胞和肠道微生物群组成的变化.
- 通过口给野生型小鼠注射Ruminococcus gnavus.
主要成果:
- 与肠道巨细胞中抗PD-1诱导的炎症前计划相结合的TREM2缺乏.
- 在肠道微生物群中观察到Ruminococcus gnavus的显著扩散.
- 与R. gnavus一起的Gavage增强了抗PD-1介导的瘤消除,模仿了TREM2缺乏效应.
- 观察到一种促炎性肠道环境,增加产生TNF的CD4+T细胞迁移到瘤.
结论:
- TREM2 缺乏通过调节肠道免疫环境和微生物群,远程增强抗PD-1 治疗.
- 球菌在这种增强反应中起着关键作用.
- R. gnavus是一种潜在的益生菌剂,可以改善抗PD-1治疗的响应性.
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