特发性炎症性肌病的分类:基于临床表现和肌炎特异性抗体  

Classification of idiopathic inflammatory myopathies based on clinical manifestations and myositis-specific antibodies

作　　者：郑松塬 陈世贤[1,2] 吴利生 赵迪 陈飞龙[1] 朱俊卿[2] 李娟[1,2,3] ZHENG Songyuan;CHEN Shixian;WU Lisheng;ZHAO Di;CHEN Feilong;ZHU Junqing;LI Juan(School of Traditional Chinese Medicine,Southern Medical University,Guangzhou 510515,China;Department of rheumatic&TCM medical center,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China;Department of Traditional Chinese Medicine,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China)

机构地区：[1]南方医科大学中医药学院,广东广州510515 [2]南方医科大学南方医院风湿病(中医)诊疗中心,广东广州510515 [3]南方医科大学南方医院中医科,广东广州510515

出　　处：《南方医科大学学报》2020年第7期1029-1035,共7页Journal of Southern Medical University

基　　金：国家自然科学基金(81774091,81973650,81803932);广东省中医药强省建设专项中医临床重点专科建设项目(粤中医函[2015]8号)。

摘　　要：目的应用聚类方法探讨基于临床表现和肌炎特异性抗体的特发性炎症性肌病(IIM)的疾病分类。方法回顾性分析2015~2019年期间就诊于南方医院符合纳入及排除标准的IIM患者,收集血清肌酸激酶(CK)、间质性肺炎(ILD)、合并肿瘤、肌炎特异性抗体等临床资料,通过二阶聚类法进行疾病分类,并分析不同聚类组的临床特征。结果共71例IIM患者纳入本研究,其中多发性肌炎(PM)30例(42.3%),经典皮肌炎(DM)20例(28.2%),无肌病皮肌炎(CADM)16例(22.5%),免疫介导的坏死性肌病(IMNM)5例(7.0%);二阶聚类将IIM分为3类;第1类患者典型临床特征为皮疹、抗MDA5抗体阳性和低蛋白血症(P<0.05),CK正常或略高,主要对应CADM[占15例(51.7%)];第2类患者CK值及抗SRP抗体阳性率显著较高(P<0.001),对应IMNM[占4例(57.1%)];第3类主要为PM患者,以抗合成酶抗体阳性为主要特点(P=0.022),与抗合成酶抗体综合征(ASS)密切相关[占17例(48.6%)]。结论本研究基于临床和血清学特征(特别是肌炎特异性抗体)的聚类分析表明IIM可分为3个亚组,其中ASS是具有独特临床特征的IIM疾病亚群,研究提供了新的IIM分类思路。Objective To investigate the classification of idiopathic inflammatory myopathies(IIM)based on clinical manifestations and myositis-specific antibodies using cluster analysis.Methods We retrospectively analyzed the data of patients with IIM admitted in Nanfang Hospital in 2015-2019.The clinical data of the patients including serum creatine kinase(CK),interstitial lung disease(ILD),cancer,and myositis-specific antibodies were collected for two-step cluster analysis to identify the distinct clusters of patients,whose clinical characteristics were subsequently analysed.Results A total of 71 patients with IIM were included in this study,including 30(42.3%)with polymyositis(PM),20(28.2%)with classic dermatomyositis(DM),16(22.5%)with amyopathic dermatomyositis(CADM),and 5(7.0%)with immune-mediated necrotizing myopathy(IMNM).Two-step cluster analysis identified 3 distinctive subgroups:Cluster 1 of 15(51.7%)patients characterized by rash,positive anti-MDA5 antibody and hypoproteinemia(P<0.05)with normal or slightly elevated CK level,mainly corresponding to CADM;Cluster 2 of 4(57.1%)patients with significantly elevated CK and positive anti-SRP antibody(P<0.001)corresponding to IMNM;and Cluster 3 of 17(48.6%)patients consisting primarily of patients with PM,characterized by positivity for anti-aminoacyl transfer RNA synthetases antibodies(P=0.022)corresponding to antisynthetase syndrome(ASS).Conclusions Patients with IIM can be divided into 3 subgroups based on their clinical and serological characteristics(especially myositis-specific antibodies),and among them ASS may represent an independent IIM subgroup with unique clinical characteristics.

关 键 词：特发性炎症性肌病 无肌病皮肌炎 免疫介导的坏死性肌病 肌炎特异性抗体 二阶聚类法 

分 类 号：R685[医药卫生—骨科学]