干扰素-γ驱动Treg脆弱性以促进抗瘤免疫力
Abigail E Overacre-Delgoffe1, Maria Chikina2, Rebekah E Dadey3
1Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Cell
|May 30, 2017
概括
调节性T细胞 (Tregs) 阻碍抗瘤免疫力. 由于Neuropilin-1缺乏Tregs的干扰素,它们的脆弱性提高了瘤清除和免疫治疗反应.
科学领域:
- 免疫学
- 癌症生物学
- 细胞免疫学
背景情况:
- 调节性T细胞抑制抗瘤免疫反应.
- 神经素-1 (Nrp1) 对于Treg在瘤中的稳定性至关重要,但对于周围耐受性至关重要.
- 特定于Treg的Nrp1删除会损害Treg功能,导致瘤抵抗.
研究的目的:
- 研究 Nrp1 在内 Treg 稳定性和功能中的作用.
- 确定导致Treg脆弱性的机制及其对抗瘤免疫力的影响.
- 在癌症免疫疗法中探索针对Treg脆弱性的治疗潜力.
主要方法:
- 在人类黑色素瘤和部状细胞癌患者数据中分析NRP1+Treg百分比.
- 使用竞争性小鼠模型在黑色素瘤环境中评估Nrp1缺乏和野生型Tregs.
- 通过内Tregs测量干扰素 (IFNγ) 的产生.
主要成果:
- 高内NRP1+Treg水平与特定癌症的预后不佳相关.
- 缺乏Nrp1的Tregs产生IFNγ,导致周围野生型Tregs的脆弱性.
- 由IFNγ诱导的Treg脆弱性增强了抗瘤免疫力和瘤清除.
- 对于抗PD1疗法的反应,Treg脆弱性是必不可少的.
结论:
- 在Tregs中的Nrp1表达与癌症预后有关.
- 由Nrp1缺乏的Tregs产生的IFNγ通过破坏其他Tregs来促进抗瘤免疫力.
- 针对Treg脆弱性是改善癌症免疫疗法的有希望的策略.
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