Objective To assess the role of Matrix Metalloproteinase-9 (MMP-9)in rheumatoid arthritis (RA).Methods Peripheral blood from 45 RA patients and 28 healthy individuals (HV)were collected to detect RF and hs-CRP by immuno-turbidimetry,ESR by westergren method and MMP-9 by ELISA.The correlation was analysed between MMP-9 and RF, ESR or hs-CRP,respectively,by pearson correlation analysis.Results Levels of RF,ESR,hs-CRP and MMP-9 were signifi-cantly higher in RA patients than HV group (t=3.93~5.96,P<0.001),respectively.RF high titer patients or patients with a high inflammation response showed a higher MMP-9 levels than the RF low titer or slight inflammation patients (P<0.05).MMP-9 was positively correlated to RF,ESR and hs-CRP in RA patients(P<0.05),respectively.Conclusion MMP-9 maybe a sensitive tool in the diagnosis and management of RA patients.%目的探讨基质金属蛋白酶-9（matrix metalloproteinase-9，MMP-9）在类风湿性关节炎（RA）中的诊断价值。方法收集45例 RA患者和28例健康体检者（HV）血清，采用免疫比浊法检测血清类风湿因子（RF）和超敏 C反应蛋白（hs-CRP）含量，魏氏法检测红细胞沉降率（ESR），ELISA法检测 MMP-9含量；Pearson相关分析 MMP-9与 RF，hs-CRP 及ESR相关性。结果 RA患者血清 RF，ESR，hs-CRP和 MMP-9均显著高于 HV组（t＝3.93～5.96，P 值均＜0.001）；RF高滴度组 MMP-9显著高于低滴度组（t＝2.10，P＜0.05），且高炎症组显著高于低炎症组（t＝2.08，P＜0.05）；同时 RA患者血清 MMP-9与 RF，ESR及 hs-CRP均呈正相关（r＝0.30～0.47，P值均＜0.05）。结论 MMP-9可能在 RA患者诊断治疗中具有一定价值。
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