类固醇受体联合激活剂3是调控性T细胞介导的瘤逃避的关键调节器
Sang Jun Han1,2, Prashi Jain1, Yosef Gilad1
1Department of Molecular Cellular Biology, Baylor College of Medicine, Houston, TX 77030.
概括
在调节性T细胞 (Tregs) 中删除类固醇受体辅激剂3 (SRC-3) 通过增强抗瘤免疫力,消除乳腺和前列腺瘤. 删除SRC-3的Tregs可以防止瘤复发,而不会引起自身免疫副作用.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 类固醇受体辅激剂3 (SRC-3) 在调节性T细胞 (Tregs) 中高度表达,表明其在Treg功能中的作用.
- Tregs经常抑制抗瘤免疫反应,有助于瘤生长和免疫逃避.
研究的目的:
- 研究SRC-3在瘤微环境中的Treg功能中的作用.
- 确定Tregs中删除SRC-3是否可以增强抗瘤免疫力,并导致瘤根除.
主要方法:
- 利用一种可诱导他莫西芬的Treg细胞特异性SRC-3淘汰赛 (KO) 鼠标模型,具有同基因E0771乳腺癌和前列腺癌细胞系.
- 分析了Treg增殖,瘤透,化学激素信号传递 (Ccl19/Ccl21/Ccr7) 和效应细胞招募 (IFN-γ/Cxcl9).
- 在瘤携带小鼠中进行了SRC-3 KO Tregs的采用转移.
主要成果:
- SRC-3 KO Tregs具有高度增殖性和透瘤,激活Ccl19/Ccl21/Ccr7信号传递以增强抗瘤免疫力.
- 在Tregs中SRC-3的缺失促进了通过IFN-γ/Cxcl9轴的T细胞和NK细胞透.
- SRC-3 KO Tregs抑制了野生类型的Treg功能,这些细胞的采用转移根除了已建立的瘤,赋予了对复发的持久抵抗力.
- 瘤根除发生而没有诱导系统性自身免疫病理.
结论:
- 针对Tregs中的SRC-3提供了一种强大的抗瘤免疫力和完全瘤根除的新策略.
- 在Tregs中删除SRC-3会产生持久的抗瘤免疫,而不会产生与免疫检查点调节器相关的自身免疫副作用.
- SRC-3 KO Tregs代表了一种有前途的基于细胞的疗法,用于阻断瘤生长和预防复发.
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