破碎-1+皮肤Tregs调节皮肤伤口愈合
Prudence PokWai Lui1,2, Jessie Z Xu1,2, Hafsah Aziz1,2
1Peter Gorer Department of Immunobiology, King's College London, London, SE1 9RT, UK.
Scientific reports
|September 9, 2024
概括
调节性T细胞 (Tregs) 使用Jagged-1 (Jag1) 招募中性粒细胞,增强皮肤伤口修复. 在Tregs中失去Jag1通过减少中性粒细胞积累来延缓伤口关闭.
科学领域:
- 免疫学 免疫学 免疫学
- 皮肤病学 皮肤病学
- 细胞生物学 细胞生物学
背景情况:
- 皮肤定居调节性T细胞 (Tregs) 对于免疫平衡和组织修复至关重要,包括头发再生.
- 诺奇信号连接体Jagged-1 (Jag1) 参与由Tregs.介导的头发再生.
- 在伤口愈合中表达Jag1的皮肤Tregs的作用仍然未被探索.
研究的目的:
- 研究Jag1表达性皮肤Tregs对皮肤伤口愈合的影响.
- 阐明Jag1在Tregs中影响伤口修复的机制.
主要方法:
- 在Tregs中使用了受托莫西芬诱导的Foxp3creERT2Jag1fl/fl小鼠模型进行Jag1的条件切除.
- 在Tregs中,在具有和没有功能Jag1的小鼠中评估了伤口关闭率.
- 通过流细胞测量在伤口部位分析免疫细胞群 (中性粒细胞,T细胞,巨细胞).
主要成果:
- 在Tregs中失去功能性的Jag1显著延迟了全厚伤口的关闭.
- 特雷格特异性Jag1切除减少了Ly6G+中性粒细胞在伤口部位的积累.
- 在Tregs中的Jag1并没有影响CD4+T细胞,CD8+T细胞或巨细胞在恒常状态或伤口愈合期间的丰度或激活.
结论:
- 皮肤Tregs利用Jag1-Notch信号来协调皮肤损伤期间的天生的细胞招募,特别是中性粒细胞.
- 在Tregs中的Jag1表达对于皮肤中有效的伤口修复至关重要.
- 这一途径与Jag1在头发再生中的机制不同.
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