乌梢蛇Ⅱ型胶原对关节炎大鼠免疫功能的影响

目的 研究乌梢蛇Ⅱ型胶原对关节炎大鼠的免疫调节作用,以了解乌梢蛇治疗类风湿关节炎(RA)的机制.方法 关节炎大鼠随机分成3组,即乌梢蛇Ⅱ型胶原组、牛Ⅱ型胶原组和关节炎对照组,另设健康埘照组,每组7只,乌梢蛇Ⅱ型胶原组和牛Ⅱ型胶原组分别灌胃乌梢蛇Ⅱ型胶溶液1 ml(Ⅱ型胶原15 mg/kg)和牛Ⅱ型胶溶液1 ml(Ⅱ型胶原15 mg/kg),另两组灌胃不含胶原的胶原稀释液1 ml,每日1次,连续15 d后,取大鼠外周血测抗Ⅱ型胶原抗体、淋巴细胞亚群、肿瘤坏死因子(TNF)-a、白细胞介素(IL)-10、IL-1和IL-4水平.结果 关节炎埘照组:抗Ⅱ型胶原抗体、TNF-a水平和CD4+T/CD8+比值与健康对照组相比明显升高(P＜0.05),IL-10水平明显下降(P＜0.01);乌梢蛇Ⅱ型胶原组和牛Ⅱ型胶原组:TNF-a水平和CD4+T/CD8+比值与关节炎对照组相比明显下降(P＜0.05),与健康对照组比较差异无统计学意义(P＞0.05),抗Ⅱ型胶原机体滴度较关节炎对照组下降(P＜0.05),与健康埘照组差异有统计学意义(P＜0.01),IL-10水平较关节炎对照组升高(P＜0.01),与健康对照组差异有统计学意义(P＜0.05),口服Ⅱ型胶原两组间各项免疫指标比较差异均无统计学意义(P＞0.05);外周血IL-1和IL-4水平,4组差异无统计学意义(P＞0.05).结论 乌梢蛇Ⅱ型胶原与牛Ⅱ型胶原具有相同的免疫调节作用,两者能减低关节炎大鼠外周血TNF-a水平、抗Ⅱ型胶原抗体滴度和CD4+T/CD8+比值,提高IL-10水平的作用,推测乌梢蛇Ⅱ型胶原可能是乌梢蛇治疗RA的活性药理成分.

Effectiveness of type Ⅱ collagen from Zaocys dhumnades (Cantor) on the immune functions of rats with collagen-induced arthritis

Objective To study the effect of type Ⅱ collagen (C Ⅱ) from Zaoeys dummies (Cantor)on the immune functions of rats with collagen-induced arthritis and to understand the mechanisms of RA treated with Zaoeys dhumnades (Cantor).Methods The rats with collagen-induced arthritis were randomly divided into three group:C Ⅱ from Zaocys dhumnades,bovine C Ⅱ and arthritis control group,a normal control group was set up,too.Every group had 7 rats.The C Ⅱ from Zaocys dhumnades and the bovine C Ⅱ group were fed with C Ⅱ from Zaocys dhumnades (15 mg/kg) and bovine C Ⅱ (15 mg/kg) per day respectivelyfor 15 days.The CD4/CD8 subset ratio,serum levels of anti-C Ⅱ antibody,TNF-a,IL-10,IL-1 and IL-4 in.rats were measured.Results In the arthritis group,CD4/CD8 subset ratio (P＜0.05) and serum levels of type Ⅱ collagen antibody (P＜0.01) and TNF-a (P＜0.01) were significant increased and IL-10 (P＜0.01) was significantly decreased.In the C Ⅱ from Zaocys dhumnades and bovine C Ⅱ group,CD4/CD8 subset ratio (P＜0.05) and the level of TNF-a (P＜0.01) were significantly decreased compared with the arthritis group,and had no difference compared with the normal group.The level of anti-C Ⅱ antibody was declined significantly compared with the arthritis group (P＜0.05) and had statistical difference with the normal group (P＜0.01).The level of IL-10 was significantly increased(P＜0.01),but lower than the normal group(P＜0.05).There was no statistical difference in the level of IL-1 and IL--4 in.all four groups.Conclusion C Ⅱ from Zaoeys dhum-nades (Cantor) is as effective as bovine C Ⅱ in modifying the immune functions of collagen-induced arth-ritis in rats.They can decrease the level of anti-C Ⅱ antibody,the level of TNF-a,CD4/CD8 subset ratio and increase the level of IL-10 in the peripheral blood of rats with collagen-induced arthritis.C Ⅱ from Zaocys dhumnades may be one of the important pharmacological active components that have the potential in treating rheumatoid arthritis.