编码为4-1BB的CAR通过基胺修饰酶A20的隔离导致细胞死亡
Zhangqi Dou1,2, Thomas Raphael Bonacci3, Peishun Shou1
1Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA.
Cellular & molecular immunology
|June 27, 2024
概括
在CAR-T细胞中的4-1BB共刺激域通过隔离A20引起细胞死亡和聚合. 调节A20水平或4-1BB结合可以挽救这些效应并改善抗瘤活性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 化学抗原受体 (CAR) -T细胞利用CD28和4-1BB等共刺激性内域来持续抗瘤活性.
- 在CAR-T细胞中异位CD28或4-1BB的影响背后的分子机制尚未完全理解.
研究的目的:
- 研究CAR-T细胞内由4-1BB共刺激域触发的分子事件.
- 阐明4-1BB对细胞聚合,细胞死亡途径和抗瘤功能的影响.
主要方法:
- 研究的CAR-T细胞是用4-1BB内域进行工程的.
- 研究了细胞群形成,细胞亡和亡.
- 进行了涉及A20,TRAF,NF-κB,ICAM-1和RIPK1/RIPK3/MLKL通路的机制研究.
- 使用的基因修饰包括A20过度表达和删除4-1BB.BB中的TRAF结合基因.
主要成果:
- 4-1BB在CAR-T细胞中被纳入,诱导了细胞的形成和细胞死亡 (细胞亡和亡),独立于强烈的CAR信号.
- 4-1BB通过TRAF将A20隔离到细胞膜,导致A20缺乏,NF-κB过活,ICAM-1过度表达,细胞聚合和亡.
- 基因干预,如过度表达A20或修改4-1BB的TRAF结合部位,可以防止细胞聚合和死亡.
结论:
- 4-1BB内域触发特定的分子事件,通过A20封存和NF-κB/亡通路激活导致细胞聚合和死亡.
- 4-1BB-A20相互作用的基因调节可以减轻不利的细胞效应,并增强4-1BB-costimulatedCAR-T细胞的治疗潜力.
关键词:
在 4-1BBBB 中.A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20 A20化学抗原受体 (CAR) -T细胞在 NF-κBB 中.尸体灭 (Necroptosis) 是一种死亡的过程.与TNF受体相关的因子 (TRAF)更多相关视频
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