在临床前模型中增强瘤控制和存活率,采用采用细胞疗法,先进行低剂量放射治疗
Nahum Puebla-Osorio1, Natalie Wall Fowlkes2, Hampartsoum B Barsoumian1
1Department of Radiation Oncology-Research, The University of Texas MD Anderson Cancer Center, Houston, TX, United States.
Frontiers in oncology
|October 24, 2024
概括
低剂量放射疗法 (LDRT) 与仿真抗原受体T (CAR-T) 细胞疗法相结合,可增强瘤控制和固体瘤的存活率. 这种组合促进了CAR-T细胞的透,为改善癌症治疗结果提供了一个有希望的策略.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 辐射疗法 辐射疗法
背景情况:
- 化学抗原受体T (CAR-T) 细胞疗法在血液癌症中表现有前途,但由于透不良和免疫抑制微环境,在固体瘤中面临挑战.
- 有效的CAR-T细胞透到固体瘤中对于强大的抗瘤反应和改善治疗结果至关重要.
研究的目的:
- 评估低剂量放射治疗 (LDRT) 是否可以增强CAR-T细胞透,并改善固体瘤中的抗瘤作用.
- 测试结合LDRT与T细胞疗法的假设,与单一治疗相比,LDRT与T细胞疗法的结合改善了瘤控制和存活率.
主要方法:
- 在NSG和C57BL/6小鼠模型中研究了与CAR-T或pmel+T细胞疗法相结合的LDRT,这些小鼠模型具有固体瘤 (GSU,CAPAN-2,MC38-gp100+).
- 监测瘤生长和生存结果.
- 利用原子力显微镜 (AFM) 来评估放射治疗引起的瘤硬性和可塑性变化作为潜在的生物标志物.
主要成果:
- 经过T细胞治疗后的LDRT显示,在所有测试模型中增强了瘤控制和延长了生存时间.
- 与单一治疗相比,组合疗法显示出优异的瘤抑制和存活率,这表明了协同效应.
- AFM分析显示LDRT后瘤 nanomechanics (刚性,可塑性) 的显著变化,表明治疗反应的预测潜力.
结论:
- 在采用T细胞治疗之前加入LDRT是一种有前途的策略,可以增强CAR-T和pmel+ T细胞透到固体瘤中的潜力.
- 结合LDRT和T细胞疗法显著改善瘤控制和生存结果.
- 由AFM评估的瘤纳米机械性质可以作为固体瘤治疗疗效的预测生物标志物.
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