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第43卷第4期 南京医科大学学报(自然科学版)
2023年4月 Journal of Nanjing Medical University(Natural Sciences) ·459 ·
·基础研究·
类风湿关节炎患者 CD4 CD25 CD127 调节性 T 细胞 CXCR4 的
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研究
蒋 宇 ,汤 郁 ,陈 頔 ,史 伟 ,龚 勋 ,费小明 2
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江苏大学附属医院风湿免疫科,血液科,江苏 镇江 212001
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[摘 要] 目的:研究类风湿关节炎(rheumatoid arthritis,RA)患者外周血(peripheral blood,PB)及关节滑液(synovial fluid,SF)
中调节性T细胞(regulatory T cell,Treg)表达CXC趋化因子受体4(C⁃X⁃C motif chemokine receptor 4,CXCR4)的水平以及与疾病
活动标志物的相关性,探讨CXCR4 Treg参与RA的发病机制。方法:①收集51例RA患者及40例健康人外周血,常规关节穿
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刺术抽取 10 例 RA 患者和 8 例骨关节炎(osteoarthritis,OA)患者膝关节滑液,流式细胞术检测外周血及关节液中 CD4 CD25 +
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CD127 Treg及CXCR4 Treg细胞比例。收集RA患者临床资料,与外周血Treg及CXCR4 Treg比例进行相关性分析。②Ficoll
密度梯度离心法分离RA 患者和健康人外周血单个核细胞(peripheral blood mononuclear cell,PBMC),免疫磁珠正选试剂盒分
选 CD4 T 细胞置于 Transwell 上室,下室加入趋化因子配体 12(C⁃X⁃C motif chemokine ligand 12,CXCL12),24 h 后收集下室细
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胞,流式细胞术检测迁移到下室的 CD4 CD25 CD127 Treg。结果:①与健康对照相比,RA 患者外周血 Treg 及 CXCR4 Treg 比
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例均降低;其中高疾病活动度组和中疾病活动度组比例均低于缓解组(P < 0.05);RA 患者外周血 CXCR4 Treg 细胞比例与
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血沉(erythrocyte sedimentation rate,ESR)、C反应蛋白(C⁃reactive protein,CRP)、白细胞介素⁃6(interleukin⁃6,IL⁃6)水平及28个
关节疾病活动度评分(DAS28)呈负相关。②RA 患者关节液 Treg 及 CXCR4 Treg 比例较 OA 患者关节液增高。③RA患者关
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节液中Treg及CXCR4 Treg细胞比例较外周血增高。④与健康对照相比,RA患者外周血CXCR4 Treg迁移率增加。结论:类
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风湿关节炎患者外周血Treg、CXCR4 Treg比例下降,并与病情活动度相关;炎症关节滑液中Treg及CXCR4 Treg高于外周血及
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OA患者。RA患者关节液增多的Treg细胞可能是由外周血通过CXCR4迁移而来。
[关键词] 类风湿关节炎;调节性T细胞;CXCR4;滑液
[中图分类号] R593.22 [文献标志码] A [文章编号] 1007⁃4368(2023)04⁃459⁃09
doi:10.7655/NYDXBNS20230403
Study on CXCR4 of CD4 CD25 CD127 regulatory T cells in patients with rheumatoid arthritis
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JIANG Yu ,TANG Yu ,CHEN Di ,SHI Wei ,GONG Xun ,FEI Xiaoming
Department of Rheumatology and Immunology,Department of Hematology,the Affiliated Hospital of Jiangsu
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University,Zhenjiang 212001,China
[Abstract] Objective:To study the expression of C⁃X⁃C motif chemokine receptor 4(CXCR4)on regulatory T cells(Tregs)in
peripheral blood(PB)and synovial fluid(SF)of rheumatoid arthritis(RA)and its correlation with clinical characteristics;so as to
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explore the pathogenesis of RA involving CXCR4 Tregs. Methods:①The PB samples of 51 RA patients and 40 healthy volunteers
were collected,and the knee SF samples of 10 patients with RA and 8 patients with osteoarthritis(OA)were collected by puncture of
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joint cavity. Then the ratio of CD4 CD25 CD127 Tregs and CXCR4 Tregs in PB and SF was detected by flow cytometry. Clinical data
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of RA were collected,and the correlation analysis was made with Tregs and CXCR4 Tregs ratio in PB. ② The peripheral blood
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mononuclear cells(PBMC)of RA and healthy volunteers were separated by Ficoll density gradient centrifugation method. CD4 T cells
were sorted by immunomagnetic positive selection kit and placed in the upper chamber of Transwell. C⁃X⁃C motif chemokine ligand
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12(CXCL12)was added to the lower chamber. After 24 hours,the cells of the lower chamber were collected,and the CD4 CD25 +
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CD127 Tregs migrated to the lower chamber were detected by flow cytometry. Results:①Compared with healthy controls,the ratios of
[基金项目] 国家自然科学基金(81571582);江苏省社会发展重点项目-临床先进技术(BE2020681)
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通信作者(Corresponding author),E⁃mail:tangtang@ujs.edu.cn