抗风湿颗粒对胶原诱导关节炎大鼠骨保护素、核因子-κB受体激活因子配体和巨噬细胞集落刺激因子表达的影响

目的:观察抗风湿颗粒(Kangfengshi Granules,KFSG)对胶原诱导关节炎大鼠骨组织中骨保护素(osteoprotegerin,OPG)、核因子-κB受体激活因子配体(receptor activator of nuclear factor-κB ligand,RANKL)和巨噬细胞集落刺激因子(macrophage colony stimulating factor,M-CSF)mRNA表达的影响,探讨KFSG治疗类风湿关节炎(rheumatoid arthritis,RA)的作用机制。方法:40只SD大鼠随机分为正常对照组、模型组、环孢菌素A(cyclosporine A,CsA)治疗组和KFSG治疗组。除正常对照组外,其余各组大鼠予以皮下注射Ⅱ型胶原诱导关节炎模型。治疗4周后,采用实时定量PCR技术检测各组大鼠骨组织中OPG、RANKL和M-CSF mRNA的表达水平。结果:造模大鼠90%出现关节炎症状。治疗4周后,模型组、CsA治疗组和KFSG治疗组与正常对照组比较,RANKL mRNA和M-CSF mRNA的表达增高,OPGmRNA的表达降低,RANKL mRNA/OPG mRNA比值亦增高,差异均有统计学意义。KFSG治疗组与模型组比较,OPG mRNA的表达水平上调,M-CSF mRNA的表达水平下调,RANKL mRNA/OPG mRNA比值下降,差异均有统计学意义。结论:KFSG治疗RA骨质破坏的分子机制可能与其上调OPG mRNA的表达、下调M-CSF mRNA的表达及降低RANKL mRNA/OPG mRNA比值有关。

Effects of Kangfengshi Granules on expressions of osteoprotegerin, RANKL and M-CSF in bone tissues of rats with collagen-induced arthritis

OBJECTIVE: To observe the effects of Kangfengshi Granules (KFSG) on expressions of the mRNAs of osteoprotegerin (OPG), receptor activator of nuclear factor-kappaB ligand (RANKL) and macrophage colony stimulating factor (M-CSF) in bone tissues of rats with collagen-induced arthritis. METHODS: Forty SD rats were randomly divided into four groups: normal control group, untreated group, cyclosporine A (CsA)-treated group and KFSG-treated group. Except the rats in the normal control group, all the other rats received subcutaneous injection of collagen II to establish collagen-induced arthritis (CIA) models. Then the rats in each group were fed normal saline or corresponding drugs for four weeks. Total RNA was extracted from carpal and digital bones. The expressions of OPG, RANKL and M-CSF mRNAs were examined by real-time PCR. RESULTS: The total incidence of arthritis induced by collagen II in the rats was approximately 90%. The expression levels of RANKL and M-CSF mRNAs and the RANKL mRNA/OPG mRNA ratio in the untreated group, KFSG-treated group and CsA-treated group were all significantly higher than those in the normal control group, while the expression levels of OPG mRNA in those three groups were significantly lower than that in the normal control group. The expression level of OPG mRNA in the KFSG-treated group was obviously higher while the expression level of M-CSF mRNA and the RANKL mRNA/OPG mRNA ratio in the same group were both lower as compared with those in the untreated group. CONCLUSION: The molecular mechanism of effects of KFSG on bone erosion and destruction induced by rheumatoid arthritis is closely correlated with up-regulating the expression of OPG mRNA, down-regulating the expression of M-CSF mRNA and RANKL mRNA/OPG mRNA ratio.