首页> 中文期刊> 《中华风湿病学杂志》 >Ku抗体在自身免疫性结缔组织病中的意义

Ku抗体在自身免疫性结缔组织病中的意义

摘要

Objective To explore Ku-Ab distribution in connective tissuedisease (CTD) in China and its clinical significance.Method Ku antigen was extracted from rabbit thymus and was used to detect Ku-Ab in the sera of 50 normal controls and 438 CTD patients by double immunodiffusion.Results Among the 438 CTD patients,12 had positive Ku-Ab,and among the 15 systemic sclerosis-polymyositis (SSc-PM) overlap syndrome,9 had positive Ku-Ab.As for SSc-PM,the test of Ku-Ab had a sensitivity of 60.0% and a specificity of 99.4%.Compared with Ku-Ab-negative SSc patients,all of the Ku-Ab-positive patients had concomitant myositis (P<0.01).Conclusion Anti-Ku antibody is not common,but there is significant relevance between Ku-Ab and PM in SSc.SSc with positive Ku-Ab may be a subclass,while its clinical characteristics are yet to be further studied.%目的 探讨Ku抗体在我国结缔组织病(CTD)中的分布及其临床意义。方法 制备兔胸腺丙酮粉,提取Ku抗原,以免疫双扩散法测定50份正常人和438份不同CTD患者血清中Ku抗体阳性率,分析Ku抗体阳性患者的临床和实验室特点。结果 438份CTD患者血清中12例Ku抗体阳性,其中系统性硬化症多发性肌炎重叠结缔组织病(SSc-PM)占9例。对SSc-PM而言,Ku抗体的敏感性60.0%,特异性99.4%。Ku抗体阳性的SSc与阴性的SSc比较,发现阳性的SSc患者多同时有肌炎表现,两组间差异有极显著性(P<0.01)。结论 Ku抗体并非常见,对SSc而言,Ku抗体与肌炎显著相关。Ku抗体阳性的SSc可能是SSc中的另一亚型,其临床特点还待更多病例观察随访。

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