内源性CD28驱动了骨髓瘤和淋巴瘤模型中CAR-T细胞的持续活动
Mackenzie M Lieberman1, Jason H Tong2, Nkechi U Odukwe3
1Roswell Park Cancer Institute Buffalo, NY United States.
Blood cancer discovery
|February 2, 2026
概括
在用CAR T细胞治疗的多发性骨髓瘤和淋巴瘤模型中,阻断CD28信号意外加速瘤再生. 在CAR T细胞上的内源性CD28对持续的抗瘤活性和瘤微环境中的细胞因子释放至关重要.
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:
- 化学抗原受体 (CAR) T细胞疗法,特别是针对BCMA的CAR T细胞,已经彻底改变了多发性骨髓瘤 (MM) 治疗.
- 然而,疾病复发仍然是一个重大挑战,需要制定提高CAR T细胞疗效的策略.
研究的目的:
- 调查CD28存活信号在MM对CAR T细胞疗法的敏感性中的作用.
- 为了确定抑制CD28是否可以改善CAR T细胞对MM和淋巴瘤的反应.
主要方法:
- 用CAR T细胞治疗的MM和淋巴瘤的临床前模型.
- 涉及CD28阻断和CD28淘汰CAR T细胞的研究.
- 在瘤微环境 (TME) 中分析CAR T细胞活动,新陈代谢,增殖和细胞因子释放.
主要成果:
- 与假设相反,CD28阻断在临床前模型中加速了瘤的再生.
- 在4-1BB共刺激的CAR-T细胞上的内源性CD28在体内活动延长.
- CD28信号重新编程了线粒体新陈代谢,维持了氧化还原平衡,刺激了增殖,并促进了TME中的炎症性细胞因子释放.
- 暂时的CD28阻断减少了TME细胞因子,但没有显著影响CAR T细胞存活率.
结论:
- 在MM和淋巴瘤模型中,内源性CD28信号传递对于持续的CAR T细胞反应至关重要.
- 抑制CD28信号传递可能会损害CAR T细胞的功能,并促进瘤的进展.
- 这些发现强调了CD28在调节瘤微环境中的CAR T细胞疗效方面的关键作用.
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