重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白在胶原诱导性关节炎大鼠中的疗效观察及其对骨桥蛋白的影响

目的 观察重组人Ⅱ型肿瘤坏死因子受体-抗体融合蛋白(rhTNFR:Fc)在胶原诱导性关节炎(CIA)大鼠中对滑膜、关节软骨等的保护作用,并分析其对骨桥蛋白表达的影响.方法 建立CIA模型,第13天开始对治疗组采用rhTNFR:Fc腹腔注射治疗(10 mg/kg,隔日1次),每周测量体质量及踝关节的前后径,第36天处死大鼠,苏木素-伊红(HE)及甲苯胺蓝染色观察踝关节组织病理变化并进行病理评分;酶联免疫吸附试验(ELISA)检测血浆肿瘤坏死因子(TNF)-α和骨桥蛋白水平,免疫组织化学法检测踝关节骨桥蛋白的组织学表达.多组间均数比较采用单因素方差分析.结果 病理评分定量分析结果 显示造模组与治疗组比较,治疗组关节病理评分显著降低(分别为8.2±1.0与4.8±1.4,P<0.05);ELISA 结果 显示造模组平均血浆TNF-α和骨桥蛋白值分别为(713±146)pg/ml,(4.3±0.6)ng/ml,治疗组分别为(68±20)pg/ml,(4.2±0.6)ng/ml,2组间比较,血浆TNF-α值差异有统计学意义(P<0.05),而骨桥蛋白值差异无统计学意义(P=0.688);免疫组织化学显示骨桥蛋白主要表达在滑膜衬里层、软骨表面,造模组与治疗组间比较差异有统计学意义(P<0.05).结论 rhTNFR:Fc能显著减轻CIA大鼠关节及软骨的破坏,并能显著减少骨桥蛋白在关节滑膜的表达,延缓病情的进展.但不能减少骨桥蛋白在外周血浆中的表达,推测其原因可能为骨桥蛋白不直接参与炎症的发展过程,而主要参与骨质的破坏及吸收过程.

Abstract：

Objective To investigate the protection effects of recombinant human tumor necrosis factor-α receptor Ⅱ :IgG Fc fusion protein for injection (rhTNFR:Fc) on rats with collagen-induced arthritis (CIA) and analyze osteopontin (OPN) changes following therapy in order to understand its primary mechanism of action. Methods CIA was induced by bovine Ⅱ collagen (B Ⅱ C) injection. Rats were treated with rhTNFR:Fc from the 13th day after the first injection of B Ⅱ C till the 36th day. The anterior-posterior diameters of ankle joints and weight were measured weekly. The pathological score was evaluated by HE staining and toluidine blue staining. The blood plasma TNF-α and OPN levels were measured by ELISA and the histology expression was evaluated by immuno-histochemistry. Comparisons between groups were performed with one-way ANOVA. Results Quantitative analysis showed pathological score in the model group and treatment group was significantly reduced in joint pathology (8.2±1.0 vs 4.8±1.4, P<0.05). The mean plasma levels of TNF-α and OPN values were (713±146) pg/ml, (4.3±0.6) ng/ml respectively in the model group,but those of the treatment group were (68±20) pg/ml, (4.2±0.6) ng/ml. Serum TNF-α values were significantly different (P<0.05) between the two groups, while no significant difference was found in the value of plasma OPN (P=0.688) between the two groups. rhTNFR:Fc could reduce the cells OPN expression in the interface layer of the synovium and cartilage (P<0.05). Conclusion Pathology scores and ELISA results haveshown that rhTNFR:Fc has good therapeutic efficacy. It can significantly reduce the bone and cartilage damage of CIA mouse model, and can significantly reduce the expression of OPN in the sliding joints, thereby delay disease progression. However, it can not reduce the expression of OPN in the peripheral blood plasma.OPN may be involved in bone destruction and resorption rather than in inflammatory process.

The efficacy of rhTNFR:Fc and its effect on osteopontin in the collagen-induced arthritis mice model

Objective To investigate the protection effects of recombinant human tumor necrosis factor-α receptor Ⅱ :IgG Fc fusion protein for injection (rhTNFR:Fc) on rats with collagen-induced arthritis (CIA) and analyze osteopontin (OPN) changes following therapy in order to understand its primary mechanism of action. Methods CIA was induced by bovine Ⅱ collagen (B Ⅱ C) injection. Rats were treated with rhTNFR:Fc from the 13th day after the first injection of B Ⅱ C till the 36th day. The anterior-posterior diameters of ankle joints and weight were measured weekly. The pathological score was evaluated by HE staining and toluidine blue staining. The blood plasma TNF-α and OPN levels were measured by ELISA and the histology expression was evaluated by immuno-histochemistry. Comparisons between groups were performed with one-way ANOVA. Results Quantitative analysis showed pathological score in the model group and treatment group was significantly reduced in joint pathology (8.2±1.0 vs 4.8±1.4, P<0.05). The mean plasma levels of TNF-α and OPN values were (713±146) pg/ml, (4.3±0.6) ng/ml respectively in the model group,but those of the treatment group were (68±20) pg/ml, (4.2±0.6) ng/ml. Serum TNF-α values were significantly different (P<0.05) between the two groups, while no significant difference was found in the value of plasma OPN (P=0.688) between the two groups. rhTNFR:Fc could reduce the cells OPN expression in the interface layer of the synovium and cartilage (P<0.05). Conclusion Pathology scores and ELISA results haveshown that rhTNFR:Fc has good therapeutic efficacy. It can significantly reduce the bone and cartilage damage of CIA mouse model, and can significantly reduce the expression of OPN in the sliding joints, thereby delay disease progression. However, it can not reduce the expression of OPN in the peripheral blood plasma.OPN may be involved in bone destruction and resorption rather than in inflammatory process.