通过防止PD-1抑制,STAT5激活增强了结合接种的采用疗法
Aaron E Fan1,2, Hussein Sultan2,3, Takumi Kumai4
1Division of Pediatrics, Neuro-Oncology Section, MD Anderson Cancer Center, Houston, Texas.
Molecular cancer therapeutics
|November 25, 2024
概括
采用细胞疗法与类疫苗相结合,可以扩大抗原特异性T细胞. 具有构成性活跃STAT5 (CA-STAT5) 的工程T细胞通过减少疲劳来增强其抗瘤活性和持久性.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症治疗 癌症治疗
- 细胞生物学 细胞生物学
背景情况:
- 采用细胞疗法 (ACT) 显示出癌症治疗的前景.
- STAT5对于T细胞的增殖和分化至关重要.
- 将ACT与疫苗接种策略结合起来可以增强抗瘤反应.
研究的目的:
- 研究ACT与类疫苗接种策略 (TriVax) 的组合.
- 探索构成性活性STAT5 (CA-STAT5) 在工程T细胞中用于癌症治疗的作用.
- 在黑色素瘤模型中评估CA-STAT5对T细胞功能和抗瘤功效的影响.
主要方法:
- 通过逆转录病毒转导产生表达gp100T细胞受体 (TCR) 的工程 CD8 T细胞.
- 一些T细胞被共同转换以表达CA-STAT5.5.
- 功能性检测和流细胞测量被用来评估T细胞活性.
- 携带B16F10黑色素瘤的小鼠用ACT和TriVax疫苗接种治疗.
主要成果:
- TriVax选择性地扩展了gp100特定的TCR转的T细胞.
- CA-STAT5表达增加了T细胞扩张,多功能性和持久性.
- CA-STAT5降低了T细胞上的PD-1表达,表明疲劳减少.
- 组合疗法在黑色素瘤模型中表现出强大的抗瘤效应,由CA-STAT5.5放大.
- CA-STAT5减弱了PD-1/PD-L1抑制途径,增强了抗瘤活性.
结论:
- 经TCR转换的CD8T细胞在TriVax疫苗接种时以抗原依赖的方式扩大.
- CA-STAT5增强T细胞的增殖,持久性和抗瘤功效.
- 在抗瘤T细胞中,CA-STAT5促进了对PD-1/PD-L1介导的抑制的抗性.
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