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类风湿关节炎患者T细胞受体BV基因的表达 |
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徐悦 姜良勇 王福庆 陈诗书 冯国璋 倪立青 劳志英
【摘 要】 目的 检测中国人群中类风湿关节炎(RA)患者T细胞TCR BV基因表达的偏移。方法 采用半定量RT-PCR方法,分析6例RA患者的外周血、关节液、滑膜(每例均取三种标本)中新鲜分离的未经IL-2刺激的T细胞TCR BV1~20基因片段的表达。结果 患者外周血与正常人外周血TCR BV基因表达格局相似;患者关节液与滑膜TCR BV基因表达格局相似;而患者关节内(关节液+滑膜)TCR BV基因表达格局与外周血相比,BV2、BV7、BV11高,BV13.1、BV20低。结论 RA患者关节内T细胞在对TCR BV基因片段的优势表达。 【关键词】 关节炎,类风湿 TCR BV基因 聚合酶链反应
Expression of T cell receptor BV gene in rheumatoid arthritis patients
XU Yue JIANG Liangyong WANG Fuqing,et al. (Shanghai Second Medical University,Shanghai 200025)
【Abstract】 Objective To detect the biased expression of TCR BV gene in Chinese rheumatoid arthritis (RA) patients.Methods With the semi-quantitative PCR method,the expression of TCR BV 1~20 gene elements of T cells which have not been activated by IL-2 was analysed.These T cells were freshly isolated from peripheral blood,synovial fluid and synovial membrane from six RA patients.Results There was no difference in BV gene expression pattern between PB T cell of RA patients and controls.The expression of TCR BV gene elments was identical in SF and SM T cells;but the BV2,BV7 and BV11 were increased former while the BV13.1 and BV20 were increased latter when the expression pattern was compared between SF+SM TCR BV gene and PB TCR BV gene of the RA patients.Conclusion There is a prior expression of TCR BV gene elements in the T cells in the arthrosis of RA patients. 【Key words】 Arthritis,rheumatoid TCR BV gene Polymerase chain reaction
编码TCR各链的基因由许多不连续的V、(D)、J、C基因片段组成,在T细胞的发育过程中,通过众多基因片段发生重排等诸多机制,产生极其多样的未成熟TCR谱。未成熟TCR谱经过胸腺的阳性、阴性选择,构成成熟TCR谱。成熟TCR谱在外来抗原的驱动下出现偏移,表现为某些TCR BV基因片段的限制性表达。 类风湿关节炎以外周关节滑膜炎为特征,受累关节滑膜内有大量单个核细胞浸润,其中20%~50%为T细胞。细胞表面的分化抗原表明这些T细胞主要为激活的记忆Th细胞。强烈提示这些T细胞曾接触过抗原。近几十年来,关于RA患者体内T细胞是否限制性表达了某些TCR BV基因片段已有大量的研究报道。最初的方法用Southern印迹和Cβ探针杂交来检测TCRβ链基因的重排,其后运用针对特异性V家族的单克隆抗体的方法,近年应用PCR方法检测TCR BV基因的表达,该方法在基因转录水平进行分析,极度敏感,且可用PCR产物进一步分析TCR CDR3的特性。但是至今未能取得一致的结果,[1] [2] 下一页 上一个医学论文: 自体骨髓干细胞移植治疗系统性红斑狼疮的临床研究 下一个医学论文: TNF
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