使用CombiCells,一个位和细胞表面连接体的组合显示平台,研究T细胞抗原灵敏度调节的辅助受体
Ashna Patel1, Violaine Andre1, Sofia Bustamante Eguiguren1
1Sir William Dunn School of Pathology, University of Oxford, Oxford, OX1 3RE, UK.
The EMBO journal
|January 4, 2024
概括
研究人员开发了CombiCells,以精确控制细胞表面连接物组合. 这种方法增强了对T细胞受体敏感性和对细胞决策的共刺激/共抑制影响的理解.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 合成生物学 合成生物学
背景情况:
- 研究细胞间相互作用受到控制细胞表面多重连接体密度的困难所限制.
- 现有的方法缺乏灵活性,以独立变化各种配体的度,以实现精确的实验控制.
研究的目的:
- 开发一种新的平台,用于对细胞表面连接体的组合性显示.
- 为了研究T细胞受体 (TCR) 对抗原呈现的敏感性.
- 评估共刺激和共抑制受体对T细胞激活的影响.
主要方法:
- 工程细胞表达SpyCatcher,以对Spytag融合的配体进行共价结合.
- 使用不同度和不同组合的Spytag-ligands进行快速组合细胞表面显示 (CombiCells).
- 评估了T细胞对使用CombiCells的不同联结体配置的反应.
主要成果:
- TCRs对-MHC复合体的敏感性比CAR或BTE对CD19的敏感性更高.
- CD2/CD58相互作用显著提高了TCR灵敏度;LFA-1/ICAM-1相互作用适度提高了CAR灵敏度.
- 不管是TCR/pMHC还是共刺激信号,PD-1/PD-L1的参与抑制了T细胞的激活.
结论:
- 康比细胞能够快速,组合地显示细胞表面连接体,克服了以前的局限性.
- 该平台有助于详细分析受体-连接体动态和T细胞反应.
- 这项技术有望加速对细胞间通信和免疫细胞功能的研究.
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