叶酸受体β在激活的巨细胞中执行免疫检查点功能
Fenghua Zhang1, Md Yusuf Al-Amin1,2, Sagar Utturkar3
1Department of Chemistry and Institute for Drug Discovery, Purdue University, West Lafayette, IN, United States.
Frontiers in immunology
|October 15, 2025
概括
叶酸受体β (FRβ) 作为免疫检查点,调节髓状细胞功能. 在小鼠中删除FRβ可以通过增强促炎反应来减少瘤生长和自身免疫症状.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 单细胞和巨细胞表达叶酸受体β (FRβ),这是一个独特的免疫细胞标记物.
- FRβ与叶酸的结合受到免疫抑制性细胞因子的调节,这表明潜在的免疫功能.
研究的目的:
- 研究FRβ.的与免疫相关的功能.
- 确定FRβ在自身免疫性疾病和瘤免疫中的作用.
主要方法:
- 野生型 (WT) 和FRβ淘汰 (KO) 鼠标的比较.
- 分析自身免疫症状,瘤生长和瘤中的免疫细胞群.
- 骨髓衍生的巨细胞的基因表达分析.
- 在体外研究巨细胞-T细胞相互作用.
主要成果:
- FRβ KO小鼠表现出自身免疫症状 (脱发,皮肤炎) 和瘤生长的减缓.
- KO瘤显示CD69+T细胞增加,PD1+T细胞和PD-L1+髓状细胞减少.
- 在巨细胞中,FRβ删除调高了促炎基因,降低了抗炎基因.
- 阻断或删除FRβ会损害巨细胞介导的T细胞激活抑制.
结论:
- FRβ作为一个免疫检查点,调节髓状细胞的免疫特性.
- FRβ在瘤免疫力中起着免疫抑制作用.
- 在人类癌症中,FRβ可能具有类似的免疫抑制功能,与生存率相反相关.
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