在持续的抗原刺激过程中,IL-15促进了 CD8 T 细胞的自我更新
Junghwa Lee1, Kyungmin Lee2, Hyeonjin Bae2
1Department of Precision Medicine, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea.
Frontiers in immunology
|July 6, 2023
概括
干白素-15 (IL-15) 在慢性感染和癌症中促进了 CD8 T 细胞 (Tpex) 的自我更新. 这一发现对于维持抗原特异性CD8 T细胞和增强对持续性疾病的免疫反应至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 病毒学 病毒学
背景情况:
- 慢性感染和癌症中耗尽的CD8 T细胞显示异构的亚群.
- 在持续的抗原暴露期间,原始体耗尽的CD8 T细胞 (Tpex) 对于自我更新和维持抗原特异性CD8 T细胞池至关重要.
- Tpex细胞是PD-1向疗法的主要响应者,突出显示了它们的治疗潜力.
研究的目的:
- 在慢性感染期间研究控制病毒特异性Tpex细胞维持的机制.
- 确定中白素-15 (IL-15) 在Tpex细胞维护和自我更新中的作用.
- 评估IL-15在慢性病毒感染和癌症中促进Tpex细胞扩张的治疗潜力.
主要方法:
- 慢性淋巴细胞胆膜炎病毒 (LCMV) 在小鼠中的感染模型.
- 使用IL-15.5进行体外和体内治疗.
- 耗尽的CD8 T细胞的单细胞RNA测序分析.
- 从细胞癌患者的CD8瘤透淋巴细胞 (TILs) 的分析.
主要成果:
- 在LCMV感染后一年的小鼠中,Tpex细胞数量显著下降,而感染后的三个月相比.
- 活体IL-15治疗优先诱导Tpex细胞的增殖和与核糖体生物发生和TCR信号传递相关的改变基因表达.
- 外源性IL-15给药增加了LCMV感染小鼠体内的Tpex细胞自我更新.
- 活体IL-15治疗促进了细胞癌患者Tpex细胞的扩张.
结论:
- IL-15在促进Tpex细胞的自我更新和维护方面发挥着关键作用.
- 给予IL-15代表了一种有前途的治疗策略,用于增强慢性感染和癌症中CD8 T细胞免疫力.
- 通过IL-15准Tpex细胞自我更新可以提高免疫疗法的疗效.
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