Tregs可以保护不变的NKT细胞介导的自身免疫性大肠炎和肝炎
Koen Venken1,2, Tine Decruy1,2, Tim Sparwasser3
1Molecular Immunology and Inflammation Unit, VIB Center for Inflammation Research, Ghent University, Ghent, Belgium.
Immunology
|November 20, 2023
概括
调控性T细胞 (Tregs) 在体内调节不变的自然杀手T (iNKT) 细胞反应,控制自身免疫性疾病. 它们的缺失加剧了肝脏和肠道炎症,突出了自身免疫中关键的Treg-iNKT细胞交叉.
科学领域:
- 免疫学 免疫学 免疫学
- 这是一种自身免疫力.
- 细胞生物学 细胞生物学
背景情况:
- 免疫调节T细胞对于预防自身免疫性疾病至关重要.
- 调节性T细胞 (Tregs) 和不变的自然杀伤性T细胞 (iNKT) 之间的体内相互作用仍然不太清楚.
- 之前的研究表明了体外相互作用,但体内Treg调节iNKT细胞功能和自身免疫性是不清楚的.
研究的目的:
- 为了研究Tregs和iNKT细胞之间的体内功能相互作用.
- 为了确定Tregs是否控制iNKT细胞子集和iNKT介导的自身免疫.
- 检查Treg-iNKT细胞交叉在肝脏和肠道自身免疫的临床前模型中的作用.
主要方法:
- 在小鼠中条件耗尽Tregs.
- 在非炎症条件下对Treg耗尽后iNKT细胞反应 (类型1,2,17子集) 的分析.
- 评估iNKT细胞无能感应和编程细胞死亡受体1 (PD-1) 的表达.
- 评估Treg-iNKT细胞相互作用在康卡纳瓦林A诱导的肝炎和oxazolone诱导的结肠炎模型中.
- 与iNKT缺乏的小鼠进行比较.
主要成果:
- Treg 枯竭增强了糖脂介导的 iNKT 细胞反应,影响了所有子集.
- 缺少Tregs抑制了iNKT细胞阳性诱导,并减少了PD-1表达.
- 在自身免疫模型中,Treg缺失导致肝脏和肠道病理显著增强.
- 在iNKT缺乏的小鼠中没有观察到病理,证实了Treg-iNKT细胞的参与.
结论:
- 在Tregs和iNKT细胞之间存在一种功能性体内交叉声.
- 这种Treg-iNKT细胞相互作用对于控制自身免疫性疾病的发病和严重程度至关重要.
- Tregs在调节iNKT细胞反应中发挥着至关重要的作用,以防止自身免疫.
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