CD155阻塞增强了对骨髓瘤瘤的全基性自然杀手细胞介导的抗瘤反应
bioRxiv : the preprint server for biology
|June 19, 2023
概括
在骨髓移植 (BMT) 后以全基性自然杀手 (NK) 细胞向CD155显示出治疗骨髓瘤 (OS) 的前景. 这种方法增强了NK细胞对OS的活性,改善了小鼠模型中的生存率.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- 全基性骨髓移植 (alloBMT) 对血液癌症有效,但对像骨髓瘤 (OS) 这样的固体瘤是不有效的.
- 骨肉瘤表达CD155,它与NK细胞受体相互作用,包括激活DNAM-1和抑制TIGIT/CD96.
- 在alloBMT后向CD155以增强抗瘤反应之前没有被研究过.
研究的目的:
- 为了研究结合异性NK (alloNK) 细胞与CD155阻塞后alloBMT治疗骨髓瘤的疗效.
- 确定DNAM-1在调解对OS的AllNK细胞反应中的作用.
主要方法:
- 鼠类NK细胞的ex vivo激活和扩张.
- 评估aloNK和同源NK (synNK) 细胞的细胞毒性,细胞因子的产生,以及对OS细胞的脱粒化在体外.
- 在实体研究中,使用肺OS转移的小鼠模型,用alloBMT,alloNK细胞输液和抗CD155 +/-抗DNAM-1阻塞治疗.
主要成果:
- 与synNK细胞相比,AlloNK细胞表现出对CD155+OS的更高的细胞毒性,CD155阻塞增强了这种细胞毒性.
- CD155阻断增加了通过DNAM-1介导的alloNK细胞脱粒和IFN-γ的产生.
- 在体内,用alloNK输液阻断CD155改善了复发性OS模型后alloBMT的存活率,DNAM-1参与对这种效果至关重要.
结论:
- 与CD155阻断相结合的alloNK细胞输液是一种安全有效的策略,可以诱导对骨髓瘤的移植对瘤效应.
- 抗瘤活性部分通过DNAM-1:CD155轴进行介导,突出其在调控alloNK反应中的重要性.
- 这种方法为接受alloBMT的患者的固体瘤提供了潜在的治疗平台.
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