通过C/EBPβ,IL-6可以选择性地抑制cDC1的规范
Sunkyung Kim1, Jing Chen1, Suin Jo1
1Department of Pathology and Immunology, Washington University in St. Louis School of Medicine, St. Louis, MO, USA.
The Journal of experimental medicine
|July 11, 2023
概括
与瘤相关的IL-6通过减少1型常规树突细胞 (cDC1) 来降低抗瘤免疫力. 这通过C/EBPβ诱导发生在树突细胞原始体中,阻碍cDC1的发展,并建议新的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 来自瘤的细胞因子可以抑制抗瘤免疫反应.
- 减少1型常规树突细胞 (cDC1) 的数量与抗瘤免疫力受损有关,但根本机制尚未完全理解.
- 介乐-6 (IL-6) 是一种经常在瘤微环境中发现的细胞因子.
研究的目的:
- 阐明与瘤相关的IL-6减少cDC1种群的机制.
- 研究转录因子C/EBPβ和NFIL3在IL-6影响下调节cDC1发育中的作用.
- 确定潜在的治疗策略,以恢复癌症中的cDC1功能.
主要方法:
- 利用小鼠和人类细胞系统研究树突细胞 (DC) 发育.
- 研究了转录因子C/EBPβ和NFIL3在调节Zeb2表达中的作用.
- 在Zeb2增强剂中缺乏特定结合位点的突变小鼠 (Δ1+2+3) 用来评估IL-6的影响.
主要成果:
- 来自瘤的IL-6降低了DC的整体发育,但选择性地影响了cDC1的发育.
- 在常见的树突细胞原始体 (CDPs) 中,IL-6诱导C/EBPβ,这与NFIL3在Zeb2增强剂结合方面竞争.
- 由IL-6损害cDC1发育依赖于Zeb2增强剂内的C/EBPβ结合位,正如突变小鼠所示.
结论:
- 与瘤相关的IL-6通过诱导CDP中的C/EBPβ来抑制cDC1的发展,破坏了NFIL3介导的Zeb2.2调节.
- 这种机制解释了瘤载体宿主中观察到的cDC1s的减少.
- 针对CDP中异常的C/EBPβ诱导可能是一个可行的策略,通过恢复cDC1发育来增强抗瘤免疫力.
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