TSC2 S1365A突变有效调节CD8+T细胞功能和分化,并改善采用细胞癌症治疗
Chirag H Patel1, Yi Dong1, Navid Koleini2
1Bloomberg-Kimmel Institute for Immunotherapy.
JCI insight
|October 3, 2023
概括
在CD8+ T细胞中调节TSC2酸化,增强了它们的效应器功能和记忆形成. 这一发现为设计更好的CAR-T细胞提供了一种新的策略,以有效地对抗癌症.
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:
- 拉巴胺素复合体1 (mTORC1) 途径的机械性标对T细胞反应至关重要,它可以整合来自免疫微环境的信号.
- 结核性硬化综合体2 (TSC2) 是mTORC1活动的关键负调节者.
- 虽然TSC2缺乏会增强T细胞的产生,但它会损害长寿记忆T细胞的形成.
研究的目的:
- 为了研究TSC2酸化在Ser1365调节mTORC1信号在CD8+T细胞中的作用.
- 确定操纵TSC2酸化是否可以增强CD8+T细胞中的效应器功能和记忆细胞生成.
- 评估TSC2-SA突变CD8+T细胞在癌症治疗中的治疗潜力.
主要方法:
- 产生和表征表达基化突变TSC2-S1365A (TSC2-SA) 的CD8+T细胞.
- 在各种条件下 (例如TCR刺激,缺氧,酸性) 评估mTORC1活动,T细胞激活,分化和效应器功能.
- 评估TSC2-SA CD8+ T细胞在小鼠和人类固体瘤模型中的抗瘤功效,作为采用细胞疗法.
主要成果:
- 特别调节的TSC2-SA突变激活了mTORC1在CD8+T细胞中的信号传递,但不是基底的mTORC1.
- 阻止TSC2 S1365酸化显著增加mTORC1激活和增强T细胞效应器功能.
- 表达TSC2-SA的CD8+T细胞表现出优异的效应反应,改善了瘤微环境中的功能,并保留了记忆细胞潜力.
- 使用TSC2-SA CD8+ T细胞的采用细胞疗法在临床前癌症模型中显示出增强的抗瘤免疫力.
结论:
- 在Ser1365中TSC2的酸化是激活的CD8+T细胞中mTORC1活动的关键上游调节者.
- TSC2-SA突变提供了一种策略,可以同时增强CD8+T细胞效应器功能和长期记忆形成.
- 具有TSC2-SA突变的工程T细胞有望开发更有效的CAR-T细胞疗法来治疗癌症.
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