C端CD28酸化 (Y218) 调节了CAR-T细胞的IL-2分泌和抗瘤作用
bioRxiv : the preprint server for biology
|February 9, 2026
概括
在CAR-T细胞疗法中,CD28协同刺激至关重要. 这项研究确定Y218酸化对CAR-T细胞功能和抗瘤疗效至关重要,为增强CAR信号提供了一个新的策略.
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细胞疗法利用CD28进行T细胞激活.
- CD28细胞内基因在CAR-T细胞功能中的确切作用尚未完全理解.
研究的目的:
- 为了研究CD28细胞内基因在CAR-T细胞功能中的作用.
- 为了在CD28中确定对CAR-T细胞活性至关重要的特定调节部位.
- 探索提高CAR-T细胞疗效的策略.
主要方法:
- 局部定向的突变发生,以产生Y218F CD28突变体.
- 在CAR-T细胞中分析IL-2的产生和细胞因子 (IL-17A,IL-17F) 概况.
- 转录形状分析以评估基因表达变化.
- 设计一种具有ITK结合动图 (PYRP) 的新型CAR.
主要成果:
- 在CD28中氨酸218 (Y218) 的酸化对于最佳的CAR-T细胞活性至关重要.
- 失去Y218酸化会影响IL-2的产生和抗瘤功效.
- Y218F CAR-T 细胞表现出一种促炎的 Th17 类表型.
- ITK 激酶调解Y218酸化的过程.
- 一种具有PYRP动机的新型CAR增强了ITK招募,Y218酸化,IL-2分泌和体内抗瘤功效.
结论:
- Y218酸化是CAR-T细胞功能和治疗潜力的关键调节者.
- 通过工程化CAR动机对ITK进行有针对性的招募,可以提高CAR-T细胞的信号传递和有效性.
- 这项研究提供了一种新的策略,通过微调CD28信号来优化CAR-T细胞治疗.
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