人软骨糖蛋白-39对CIA大鼠淋巴细胞外增殖作用的研究

目的 观察人软骨糖蛋白-39( HCgp39)对胶原诱导型关节炎(CIA)大鼠淋巴细胞激活的影响,探讨其在类风湿关节炎(RA)发病中的作用.方法 建立CIA大鼠模型,分别在建模1、2、3、4、5、6、7、8周后,分离、培养大鼠脾淋巴细胞,CCK-8法检测HCgp39对淋巴细胞增殖的影响,ELISA法检测血浆中抗HCgp39抗体及COMP的分泌水平,分析指标之间相关性.结果 建模2周后,HCgp39抗原特异性T细胞与对照组比较出现明显增殖反应(P均＜0.01),与建模时间、抗HCgp39抗体水平显著正相关,与血管翳和滑膜炎症评分显著负相关.各组抗HCgp39抗体水平和COMP水平较对照组显著增高(P均＜0.01),且抗HCgp39抗体水平与建模时间及COMP呈显著正相关.结论 HCgp39可刺激CIA大鼠脾淋巴细胞的体外异常增殖,初步提示HCgp39抗原短肽在CIA早期及后续的发病过程中可能起着一定作用.

The proliferative effect of human cartilage glycoprotein-39 on collagen-induced arthritis (CIA) rat lymphocytes

Objective To examine the proliferative effect of synthetic cyclic human cartilage glycoprotein-39 (HCgp39) on T cell of collagen-induced arthritis (CIA) rat,and to explore the role of HCgp39 in rheumatoid arthritis (RA).Methods We established the rat model of the collagen-induced arthritis (CIA).The T lymphocytes were isolated and incubated with HCgp39.Proliferation of T cells was determined by cell counting kit-8.Results Two weeks after the first immunization,T cell response to HCgp39 was more significant in CIA groups than in controls( P＜0.01 ),and the response was associated with disease course ( r =0.732,P＜0.01 ) and anti- HCgp39 antibody ( r =0.460,P＜0.01 ).A strong correlation between T cell proliferation and pannus ( r =-0.516,P＜0.01 ),synovium score ( r =-0.346,P＜0.01 ) was also observed.Besides,the levels of anti- HCgp39 antibody and comp in each CIA group were significantly higher than in controls( P＜0.01 ),and the anti- HCgp39 antibody strongly correlated with disease course( r=0.346,P＜0.01 ) and comp( r =0.235,P＜0.01 ).Conclusion The proliferative response of T cell to HCgp39 was found in the early stage of CIA rat,and the HCgp39 peptide antibody was detected in serum,suggesting that the HCgp39 antigen plays an important role in the pathogenesis of early RA.