调节性T细胞控制金黄色葡萄球菌和皮肤莱什曼病的疾病严重程度
Tej Pratap Singh1,2, Camila Farias Amorim1, Victoria M Lovins2
1Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA.
The Journal of experimental medicine
|October 9, 2023
概括
调节性T细胞 (Tregs) 对于平衡皮肤免疫力至关重要. 它们的耗尽会加剧炎症,并通过改变IL-17和IFN-γ反应,损害皮肤莱什曼病的愈合.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 皮肤病学 皮肤病学
背景情况:
- 皮肤莱什曼病破坏了皮肤微生物群,导致免疫失调和伤口愈合的延迟.
- 在皮肤感染中控制微生物群驱动的免疫反应的确切机制尚不清楚.
研究的目的:
- 研究Foxp3+调节性T细胞 (Tregs) 在Staphylococcus aureus殖民和Leishmania braziliensis感染期间调节免疫反应中的作用.
- 阐明Tregs如何影响皮肤炎症中IL-17和IFN-γ细胞因子的平衡.
主要方法:
- 在被 Staphylococcus aureus 殖民的小鼠模型中,Tregs 的耗尽.
- 同时感染模型涉及S. aureus和Leishmania braziliensis在小鼠中与改变的Treg水平.
- 对皮肤雷什曼病患者皮肤病变中的基因表达 (FOXP3,IFNG) 和细菌负担的分析.
主要成果:
- 在S. aureus殖民的小鼠中,Treg耗尽导致IL-17减少,IFN-γ增加,皮肤炎症加剧,细菌免疫力受损.
- 同时感染的小鼠中Tregs的减少加剧了IFN-γ的产生,增加了S. aureus负担,并加剧了疾病的严重程度.
- 在L. braziliensis患者病变中的低FOXP3表达与高IFNG表达,S. aureus增加和延迟愈合相关.
结论:
- Foxp3+ Tregs通过调节IL-17/IFN-γ平衡,在皮肤中维持免疫平衡方面发挥着至关重要的作用.
- 功能障碍或有限的Tregs有助于增加对细菌共感染的易感性和皮肤莱什曼病的疾病严重程度.
- 这些发现对管理特征为微生物组失调和Treg功能障碍的皮肤疾病具有重大意义.
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