不同的蛋白质-蛋白质相互作用是TCR和含有4-1BB域的CAR介导的信号的基础
Samuel A Ritmeester-Loy1, Isabella H Draper1, Eric C Bueter1
1Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA 98101, USA.
Science signaling
|March 5, 2024
概括
化学抗原受体 (CAR) T细胞利用蛋白相互作用进行信号传递. 这项研究揭示了与T细胞受体 (TCR) 相比,CAR T细胞激活的独特信号通路,为改善CAR T细胞制造提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传输 细胞信号传输
背景情况:
- 细胞信号依赖于活动依赖的蛋白质与蛋白质相互作用.
- 化学抗原受体 (CAR) T 细胞,特别是具有 4-1BB 辅助刺激域的 T 细胞,被认为模仿 T 细胞受体 (TCR) 信号复合体,但具有不同的蛋白相互作用域.
研究的目的:
- 为了研究 CD19 导向的 4-1BB:ζ CAR (bbζCAR) 参与后形成的蛋白相互作用网络 (信号体).
- 为了比较CAR T细胞的活性诱导信号体与TCRs的信号体.
- 确定监测和控制CAR T细胞生产中的生物变异的潜在标志物.
主要方法:
- 使用共免疫沉,然后进行质谱学 (Co-IP/MS) 来识别在目标参与后与bbζCAR相关的蛋白质.
- 使用定量多重共免疫沉来比较TCR和CAR信号体.
主要成果:
- bbζCAR参与发现了128种蛋白质与协会增加.
- bbζCAR信号激活了两个不同的蛋白质相互作用模块:一个与TCR信号共享 (弱交互) 和一个由TCRs不交互的新型TRAF信号复合模块.
- 介质素-2 (IL-2) 生产的变化与蛋白质网络激活大小的差异相关.
结论:
- 卡特 T 细胞的参与激活了与 TCR 不同的独特信号模块,包括 TRAF 信号综合体.
- 监测信号酶激活标记物可以帮助管理CAR T细胞制造中的生物变异性.
- 这些发现为优化未来的CAR T细胞治疗方案提供了基础.
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