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机构地区:[1]东南大学附属中大医院风湿免疫科,南京210009
出 处:《中华风湿病学杂志》2011年第8期553-555,585,共4页Chinese Journal of Rheumatology
摘 要:目的探讨锝[^99Tc]-亚甲基二膦酸盐(唧c—MDP)对Ⅱ型胶原诱导性关节炎(CIA)大鼠核因子-KB受体活化因子配体(RANKL)/骨保护素系统的作用。方法建立CIA大鼠关节炎模型,分为空白组、模型组、甲氨蝶呤组和^99Tc—MDP组,观察膝关节病理变化并评分;酶联免疫吸附试验(EusA)法检测血清RANKL、骨保护素浓度;Westernblot法检测滑膜RANKL和骨保护素表达。采用重复测量的方差分析和单因素方差分析进行统计学处理。结果甲氨蝶呤组血清RANKL/骨保护素比值[给药后1周(1.076±0.016)、给药后2周(1.140±0.005)、给药后3周(1.155±0.023)],关节病理评分[滑膜(1.8±0.5)、软骨(1.9±0.6)、骨(1.8±O.5)],滑膜RANKL/骨保护素比值(1.156±0.014)明显低于模型组(1.269±0.025、1.296±0.015、1.340±O.011),[2.9±0.4、2.6±0.5、2.6±0.5),(1.340±0.013)(P〈0.01);^99Tc—MDP组(1.035±0.034、0.986±0.019、0.991±0.020),(1.5±0.5、1.4±0.5、1.2±0.5),(0.098±0.026)明显低于甲氨蝶呤组(P〈0.01)。结论^99Tc—MDP可能通过降低RANKL/骨保护素比值起延缓关节破坏的作用,其起效时间明显早于甲氨蝶呤。Objective To study the effect of ^99Tc-MDP on receptor activator of nuclear factor-KB ligand/osteoprotegerin (RANKL/OPG) system of collagen-induced arthritis (CIA) rat. Methods The CIA was established by subcutaneous injection with type II collagen and complete Freud's adjuvant to rats, except the normal group (n=8). The rats successfully induced CIA were divided randomly into 3 groups: (1) model group (n =8, treated with normal saline); (2) Methotrexate (MTX) group (n=8, treated with MTX) ; (2) ^99Tc-MDP group (n=8, treated with ^99Tc-MDP). The histopathological changes of joints were scored based on the extent of infiltration of inflammatory cells, cartilage destruction and bone erosion. The serum levels of RANKL/OPG were tested with ELISA, and the synovial membrane levels of RANKL/OPG were tested with Western blot. Repeated ANOVA and one way ANOVA were used for statistical analysis. Results The MTX group relative value of RANKL/OPG in serum [35 d (1.076±0.016), 42 d (1.140±0.005), 49 d (1.155±0.023)], and in synovial membrane (1.156±0.014), and the histopathological scores [ synovial membrane (1.8±0.5), cartilage (1.9±0.6), bone (1.8±0.5) ] were lower than model group (1.269±0.025, 1.296±0.015, 1.340±0.011 ), (2.9± 0.4, 2.6±0.5, 2.6±0.5), (1.340±0.013)(P〈0.01). And all above index of ^99Tc-MDP group (1.035±0.034, 0.986±0.019, 0.991±0.020), ( 1.5±0.5, 1.4±0.5, 1.2±0.5), (0.098±0.026) were notably lower than the MTX treat ment group (P〈0.01). Conclusion ^99Tc-MDP may retard the progression of the disease by decreasing the relative RANKL/OPG expression and it can initiate its effect earlier than MTX.
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