在BCMA-CART细胞治疗的背景下,TIGIT阻塞在多发性骨髓瘤小鼠模型中没有增加疗效
Aina Oliver-Caldes1,2, Joan Mañe Pujol1,2, Anthony M Battram1
1Hospital Clínic de Barcelona, IDIBAPS, Barcelona, Spain.
Oncoimmunology
|July 13, 2025
概括
针对多发性骨髓瘤的BCMA导向CAR-T疗法中,针对TIGIT克服耐药性的向显示出有限的成功. 在临床前模型中,用抗体,改造的CAR-T细胞或基因编辑来阻止TIGIT并没有显著改善患者的结果.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 细胞疗法细胞疗法
背景情况:
- 针对BCMA的CAR-T疗法对多发性骨髓瘤 (MM) 是有前途的,但在患者复发方面面临挑战.
- 通过增加TIGIT表达的T细胞疲劳,是CAR-T细胞中发现的关键抵抗机制.
- ARI0002h是一种为MM开发的学术CAR-T疗法.
研究的目的:
- 研究阻断TIGIT对ARI0002hCAR-T细胞疗效的影响.
- 在临床前MM模型中评估TIGIT封锁的三个不同的策略.
主要方法:
- 他们采用了三种TIGIT阻断策略:添加抗TIGIT抗体,分泌可溶性TIGIT阻断scFv的第四代CAR-T (ARITIGIT),以及使用CRISPR/Cas9.9的TIGIT淘汰 (KO).
- 每个策略都通过体外测试和体内研究,使用小鼠模型进行了评估.
- 在体内模型包括标准的瘤挑战和复发模型与二次瘤细胞输液.
主要成果:
- 添加抗TIGIT抗体改善了体内细胞毒性,但没有提高体内生存率.
- 第4代ARITIGIT CAR-T没有显示生存益处,尽管在复发模型中观察到趋势.
- 紧密的淘汰ARI0002h (KO-ARI0002h) 在体外表现出与ARI0002h相似的活性,在体内压力模型中具有显著但不优越的生存益处.
结论:
- 这项研究没有证明TIGIT阻断对ARI0002hCAR-T细胞疗效在三种不同的方法中具有显著的治疗益处.
- 这些发现表明,针对像TIGIT这样的单个免疫检查点可能不足以克服BCMA导向的MMCAR-T治疗中抵抗机制.
- 可能需要进一步的研究来探索组合策略或替代目标,以提高复发性MM的CAR-T疗法的有效性.
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