表皮细胞使用类似于布蒂罗菲林的分子来塑造器官特异性的γδ T 细胞区
Rafael Di Marco Barros1, Natalie A Roberts2, Robin J Dart3
1Francis Crick Institute, London WC2A3LY, UK; Peter Gorer Department of Immunobiology, King's College London, London SE19RT, UK; MBPhD Programme, University College London, London WC1E 6BT, UK.
表皮细胞使用特定的基因 (Btnl) 来塑造局部T细胞区. 这种保存机制影响小鼠和人类的T细胞受体 (TCR) 发育.
科学领域:
- 免疫学
- 发育生物学
- 细胞生物学
背景情况:
- 器官特异性马三角形 (γδ) T 细胞对组织完整性至关重要.
- 表达T细胞受体 (TCR) - Vγ5的小鼠树突性皮肤T细胞 (DETC) 保护皮肤致癌物.
- Skint1基因塑造了DETC谱,但由于缺乏进化保护,其更广泛的相关性是未知的.
研究的目的:
- 调查布罗非林类 (Btnl) 基因是否塑造其他器官特异性 γδ T 细胞区.
- 确定这种机制是否在各个物种中存在.
- 阐明皮质衍生Btnl在塑造局部T细胞的作用.
主要方法:
- 研究了小鼠肠细胞中的Btn1表达及其对γδT细胞区的影响.
- 分析了Btnl1和Btnl6在诱导肠道Vγ7(+) 细胞中的T细胞受体 (TCR) 依赖反应中的联合功能.
- 对表达BTNL3和BTNL8的人类结肠上皮细胞进行了检查,以确定它们在选择性T细胞反应中的作用.
主要成果:
- 鼠类肠细胞表达的Btnl1形成了局部TCR-Vγ7(+) γδ T细胞区,独立于微生物或食物抗原.
- Btnl1和Btnl6协作诱导特异性TCR依赖的反应,特别是在肠道Vγ7(+) 细胞中.
- 人体肠上皮细胞表达BTNL3和BTNL8,它们共同诱导人体结肠Vγ4 ((+) 细胞的选择性TCR依赖反应.
结论:
- 在表皮细胞利用器官特异性BTNL/Btnl基因塑造局部T细胞区间时,存在一种保存的机制.
- 这种由上皮驱动的选择塑造了T细胞受体 (TCR) 库.
- 这一发现超越了皮肤, 揭示了免疫系统的基本原理.
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