结核病中最近激活的CD4 T细胞表达OX40作为宿主导免疫治疗的标
Abigail R Gress1,2, Christine E Ronayne1,2, Joshua M Thiede1,2
1Department of Medicine, University of Minnesota, 420 Delaware Street, SE MMC 250, Minneapolis, MN, 55455, USA.
Nature communications
|December 18, 2023
概括
在结核病中识别最近激活的CD4 T细胞至关重要. 用免疫疗法向OX40 (这些细胞的标记物) 显示出改善结核病治疗结果的希望.
科学领域:
- 免疫学 免疫学 免疫学
- 结核病研究 结核病研究
- 细胞免疫学 细胞免疫学
背景情况:
- 结核菌菌 (Mtb) 感染导致T细胞在肺部积累,但激活是有限的.
- 区分激活和非激活的T细胞是有效的免疫反应和治疗的关键.
研究的目的:
- 在Mtb感染期间识别和表征肺部最近激活的CD4 T细胞.
- 评估OX40作为激活CD4T细胞的标记物和结核病的治疗点.
主要方法:
- 利用Nur77-GFP记者小鼠识别最近激活的CD4T细胞.
- 分析了T细胞受体 (TCR) 克隆类型,基因表达 (例如,OX40) 和细胞表面标记.
- 在结核病的小鼠模型中研究了OX40激动剂免疫治疗的治疗潜力.
- 在结核性脑膜炎中检查了来自人类脑脊液的T细胞上的OX40表达.
主要成果:
- Nur77-GFPHI CD4 T 细胞表现出扩展的 TCR 克隆型,OX40 表达和保护功能.
- Nur77-GFPLO CD4 T 细胞显示了耗尽的标记,并表达了S1pr5.5.
- OX40免疫疗法暂时增加了CD4 T细胞数量,促进了保护性表型,减少了肺部细菌负担,并延长了生存时间.
- 结核性脑膜炎中人类CD4 T细胞通常表达OX40,与CD8 T细胞不同.
结论:
- 在Mtb感染部位的OX40标记最近激活的CD4T细胞.
- 用免疫疗法向OX40提供了一种潜在的策略,可以增强CD4 T细胞功能并改善结核病治疗,可能与抗生素结合使用.
- OX40是结核病和结核性脑膜炎等相关疾病的有希望的治疗点.
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