口服耐受预防大鼠复发性类风湿性关节炎的研究

目的建立实验性类风湿性关节炎(RA)的动物模型,研究口服可溶性鸡II型胶原(CCII)诱导免疫耐受对大鼠复发性RA的预防作用.方法以CCII和完全弗氏佐剂免疫Wistar大鼠,建立RA大鼠模型.在大鼠致炎前和反复造病后,口服CCII,观察其对RA复发的预防作用.并以ELISA法对大鼠血清中的抗CCII抗体进行检测.结果在Wistar大鼠成功地诱发了RA,发病率为90%.大鼠在致炎前口服CCII可明显延迟RA的发病时间并降低RA的发病率,且大鼠RA的临床症状也明显减轻.而耐受大鼠由CCII引起的迟发性超敏反应(DTH)明显受到抑制.ELISA检测结果显示口服可溶性CCII对大鼠体内抗CCII抗体的产生有一定的抑制作用.结论口服CCII可诱导特异性免疫耐受,从而对大鼠RA的发生有着明显的预防作用.

Study on the prevention of the relapsing rheumatoid art hritis in Wistar rats byoral tolerance

Abstract Objective:To establish an animal model of experimental rheumatoid arthritis(RA) and to investigate the preventing effect of orally administrated soluble chicken II collagen(CCII) on RA. Methods:The animal model of RA was induced in Wistar rats by immunization of intradermal injection with CCII in Fneund's complete adjuvant(CFA) .The arthritis degree of the experimental and control group was pros-pected and the serum levels of anti-CCII antibody were analyzed by ELISA method. Results:The RA in Wistar rats were successfully induced with CCII-CFA and the incidence of RA was 90% .The clinical expression of the disease was suppressed whether animals were fed with CCII before or relapsing sensitization. The incidence of RA was dramatically decreased in animals which were fed with CCII before disease induction, and the duration of disease was shorted significantly in animals which were fed with CCII. In addition, DTH responses to whole CCII were sup-pressed. The result of ELISA analysis showed that oral administration of soluble CCII partially suppressed Ab production. Conclusion:RA can be prevented by oral administration of CCII to induce specific immunological tolerance.