包括z-链驱动CD19-CAR T细胞中的色素信号传递
bioRxiv : the preprint server for biology
|July 17, 2025
概括
ζ 链决定了嵌合式抗原受体 (CAR) T 细胞的信号传递,而不管如何进行刺激. 抑制Itk可能会阻止抗原独立的CAR T细胞激活,提高治疗安全性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 癌症治疗 癌症治疗
背景情况:
- 化学抗原受体 (CAR) T细胞疗法对复发性/耐药性淋巴瘤有效.
- 对于CAR T激活的信号机制尚不完全了解,特别是在不同的CAR世代之间.
- 了解CAR T细胞信号传递对于优化癌症免疫治疗至关重要.
研究的目的:
- 研究共刺激对CAR T细胞激活中的铁酸化级联的影响.
- 确定特定信号域和酶在CAR T细胞信号传递中的作用.
- 评估抑制关键信号调节者的对CAR T细胞激活的影响.
主要方法:
- 使用的Jurkat T细胞与不同的CAR代进行工程 (ζ-CAR,28ζ-CAR,BBζ-CAR,28BBζ-CAR).
- 采用液体染色学-并联质谱学 (LC-MS/MS) 基于色素 (pY) 的蛋白质组学.
- 在小分子抑制剂的存在下评估CD69表达,这些抑制剂向T细胞受体 (TCR) 信号调节器.
主要成果:
- 在CAR中包含z-链构建了显著确定的甲酸信号配置文件,不论是辅助刺激.
- PTPN22和SHP-1的酸酶活性对CAR激活有微不足道的影响.
- 选择性激活BBζ-CARs没有抗原的Pervanadate (PV) 具有非特异性酸酶抑制.
- 使用索克利提尼布选择性抑制Itk减少了基底CD69表达,同时保持了抗原特异性激活.
结论:
- ζ 链是 CD19-CAR Jurkat T 细胞中色素信号传递的主要决定因素.
- Itk抑制是一种潜在的策略,可以减轻抗原独立的CAR T细胞激活,提高治疗的安全性和有效性.
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