通过向SPP1来克服对CAR T治疗的骨髓驱动性耐药性
bioRxiv : the preprint server for biology
|April 16, 2025
概括
化学抗原受体 (CAR) 固体瘤中T细胞治疗的耐药性与SPP1+巨有关. 阻止SPP1重新编程了瘤微环境,提高了CAR T细胞治疗的有效性,并在临床前模型中延长了存活时间.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 化学抗原受体 (CAR) T细胞疗法显示出希望,但在固体瘤中面临挑战.
- 瘤微环境 (TME) 显著影响CAR T细胞治疗的耐药性.
- 在TME内巨细胞在CAR T细胞治疗耐药性的特定作用尚未完全理解.
研究的目的:
- 调查巨细胞在固体瘤中调解对CAR T细胞治疗的耐药性的作用.
- 确定有助于TME中CAR T细胞治疗失败的分子机制.
- 探索针对巨细胞克服抗性的治疗策略.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 在接受CAR T细胞治疗的质瘤患者的瘤上进行.
- 综合性scRNA-seq分析对高度质瘤和对CAR T疗法耐药的综合性小鼠模型进行了分析.
- 在体内研究中,小鼠模型中使用抗SPP1抗体进行SPP1阻断.
主要成果:
- 在对CAR T细胞疗法耐药的患者的巨细胞中发现了SPP1信号的升高.
- 发现SPP1+巨细胞在TME中通过抑制途径在调解抵抗方面发挥了主导作用.
- SPP1封锁逆转了TME抑制作用,并显著改善了耐药小鼠模型中的生存率.
结论:
- SPP1+巨细胞是抑制性TME的关键驱动因素,有助于固体瘤抵抗CAR T细胞治疗.
- 向SPP1代表了一种潜在的通用策略,以提高CAR T细胞治疗在固体瘤中的疗效.
- 通过SPP1阻断重新编程免疫动力学可以减轻对CAR T细胞疗法的耐药性.
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