痹肿消汤对胶原性关节炎大鼠滑膜双向电泳蛋白质表达的影响

目的:分析痹肿消汤(bizhongxiao decoction,BZXD)对胶原性关节炎大鼠滑膜双向电泳蛋白质表达谱的影响,为阐明痹肿消汤治疗类风湿性关节炎(rheumatoid arthritis,RA)作用机制提供新线索。方法:70只SD大鼠随机分为正常对照组(正常组)、模型对照组(模型组)、痹肿消汤治疗组(BZXD组),采用皮下注射牛Ⅱ型胶原与完全福氏佐剂制成实验性关节炎(collagen-induced arthritis,CIA)模型。应用双向凝胶电泳技术(two-dimensional gel electrophoresis,2-DE)分别分离正常组、模型组、BZXD组大鼠关节滑膜的总蛋白后,胶体考马斯亮蓝染色,扫描2-DE胶获取电子图像,Pdquest图像分析软件比较分析此3组双向凝胶电泳图谱并识别差异表达的蛋白质。结果:成功复制了CIA大鼠模型;建立了正常组、模型组和BZXD组大鼠滑膜的2-DE图谱,其平均蛋白质点数分别为947±39,994±41,1031±52,其匹配率为92%,91%,94.2%;模型组的3块胶在蛋白质点位置上有较好的重复性,不同胶间蛋白质点在等电聚焦(isoelectric focusing,IEF)方向的偏差是(0.896±0.217)mm,在十二烷基磺酸钠聚丙烯酰胺凝胶电泳(sodiumdo-decylsufate-polyacrylamide gel electrophoresis,SDS-PAGE)方向的偏差为(1.102±0.104)mm。比较分析模型组和BZXD组大鼠滑膜的2-DE图谱,发现此2组间有328个差异点,BZXD组有174蛋白质点表达上调,147个蛋白质点表达下调,7个蛋白质点只在模型组表达。模型组与正常组之间有193个差异点,123个在模型组表达上调,70个表达下调。结论:建立了CIA大鼠关节滑膜的双向凝胶电泳图谱,识别了328个差异表达的蛋白质,对这些差异蛋白质的鉴定将为痹肿消汤治疗RA的作用机制提供新的实验依据。

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OBJECTIVE: To explore the effect of bizhongxiao decoction (BZXD) on the protein maps of BZXD-treated synovitis of collagen-induced arthritis (CIA) in rats in 2-dimensional gel electrophoresis (2-DE), and to provide new clues for illuminating the active mechanism of BZXD in treating the rheumatoid arthritis (RA). METHODS: Seventy SD rats were randomly divided into nor- mal group, model group and BZXD group. The experimental arthritis rat model was established by subcutaneouly injecting Type II collagen and complete Freunds adjuvant. The total proteins of synovial tissue of rat joints in the normal group, model group and BZXD group were seperated by 2-DE respectively. The gels of the 3 groups were stained by Coomassie brilliant blue. Electron pictures were obtained by scanning the gels, and then the differential proteins among the normal group, model group and BZXD group were examined by comparing the spots density volume in the gels. The electrophoregrams of the gels were analyzed in Pdquest software. RESULTS: The incidence of arthritis in the rats was approximately 88%. The 2-DE maps of rat synovial tissue in the normal group, model group and BZXD group were well duplicated. The average protein spots in the normal group, model group and BZXD group were 947 +/- 39, 994 +/- 41, and 1031 +/- 52, and the match rates were 92%, 91%, and 94.2% respectively. The average deviations of spot position were (0.896 +/- 0.217) mm in isoelectric focusing (IEF) and (1.102 +/- 0.104) mm in sodiumdo-decylsufate-polyacrylamide gel electrophoresis (SDS-PAGE), respectively. Three hundred twenty-eight differential proteins were observed between the model group and BZXD group, of which 174 were up-regulated, 147 were down-regulated in the BZXD group, and 7 proteins were expressed only in the model group. One hundred ninty-three differential proteins were displayed between the model group and the normal group, of which 123 proteins were up-regulated and 70 were down-regulated in the model group. CONCLUSION: 2-DE protein expression profiles of synovial tissue in CIA rats are established, and many differential proteins are discovered. Further analysis on the differential proteins may serve as a new method to study the moleculer mechanism of BZXD in treating the rheumatoid arthritis.