CCR4+Tfh2细胞专门产生IL-4,在IgG4相关疾病中驱动病理反应
Mitsuhiro Akiyama1, Keiko Yoshimoto2, Hidekata Yasuoka3
1Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan. mitsuaki@keio.jp.
Clinical and experimental rheumatology
|December 3, 2024
概括
CCR4识别了产生Interleukin-4的Tfh2细胞,这些细胞在IgG4相关疾病 (IgG4-RD) 中升高. 这些细胞透到受影响的组织中,并且不是葡萄糖皮质类药物的有效目标,这可能解释了高复发率.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 人类T毛囊辅助细胞 (Tfh) 包括Tfh1,Tfh2和Tfh17的子集.
- 定义为CXCR3阴性和CCR6阴性的Tfh2细胞可能包括多种不同的人群.
- 在IgG4相关疾病 (IgG4-RD) 中Tfh2细胞的作用尚不清楚.
研究的目的:
- 调查CCR4是否可以识别产生INTERLEUKIN-4 (IL-4) 的Tfh2细胞.
- 为了确定CCR4+Tfh2细胞在IgG4-RD病原发生中的参与.
主要方法:
- 多色流细胞计和t-SNE分析IL-4产生的Tfh细胞在治疗前的IgG4-RD患者.
- 在IgG4-RD患者的外周血液和受影响组织中评估CCR4+Tfh2细胞.
- 免疫组织化学染色以评估在IgG4-RD病变中的CCR4+Tfh2细胞透.
主要成果:
- CCR4+Tfh2细胞被确定为特定的IL-4产生Tfh子集,表现出更高的GATA-3和ICOS表达.
- 与对照人群相比,在IgG4-RD患者的外周血液和受影响组织中观察到CCR4+Tfh2细胞的比例增加.
- CCR4+Tfh2细胞透与血清IgG4水平相关,而葡萄糖皮质体治疗并没有减少它们的数量.
结论:
- CCR4是识别IL-4产生Tfh2细胞的可靠标记物.
- CCR4+Tfh2细胞是一个重要的T细胞群,透到IgG4-RD组织中.
- CCR4+Tfh2细胞对葡萄糖皮质激素的耐药性可能会在治疗逐渐减少期间导致疾病复发.
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