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一种病理扩展的IL-21产生CD4+T细胞的克隆系驱动着炎症神经病变

Maryamsadat Seyedsadr¹, Madison Bang¹, Ethan McCarthy¹

¹Department of Microbiology, Immunology, and Molecular Genetics, UCLA David Geffen School of Medicine; Los Angeles, CA 90095.

bioRxiv : the preprint server for biology

|January 23, 2024

概括

研究人员确定了IL-21表达CD4+T细胞,在炎症性神经病变中至关重要,如CIDP和GBS. 针对IL-21信号传递,Tfh/Tph分化和CXCR6可能为这些疾病提供新的治疗策略.

科学领域:

免疫学免疫学免疫学
神经科学是一个神经科学.
细胞生物学细胞生物学

背景情况:

炎症性神经病变,包括慢性炎症性脱髓化多神经病变 (CIDP) 和吉兰-巴雷综合征 (GBS),涉及对周围神经系统 (PNS) 的自身免疫损伤,导致渐进的虚弱和感官损失.
CD4+ T 细胞与PNS的自身免疫破坏有关,但它们的特定致病性质尚不清楚.

研究的目的:

在炎症性神经病变中识别致病性CD4+T细胞的关键特性.
阐明IL-21和细胞局部化在疾病发病过程中的作用.

主要方法:

配对的单细胞RNA测序 (scRNAseq) 和单细胞T细胞受体测序 (scTCRseq) 在来自炎症神经病变的小鼠模型的外周神经上进行.
分析的重点是确定特定的CD4+T细胞种群及其分子特征.

主要成果:

在周围神经内确定了克隆扩张,多功能IL-21表达的CD4+T细胞.
这些IL-21+ CD4+ T细胞包括两个不同的子集,表达Tfh和Tph相关基因,共享TCR克隆型,表明它们具有共同的起源.
IL-21信号传递对于神经病变的发展和T细胞透至关重要,可调节CXCR6表达的上升,从而使神经局部化.

结论:

具有IL-21表达的CD4+T细胞,可能沿Tfh/Tph通路分化,在炎症性神经病变中起着关键作用.
这些T细胞的CXCR6介导局部化是疾病发病的一个关键机制.
IL-21信号传递,Tfh/Tph分化和CXCR6代表了炎症神经病变的有前途的治疗点.

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