目的探究B细胞刺激因子(BAFF)在特发性炎性肌病(IIM)相关肺间质病变(ILD)中的临床意义。方法纳入122例IIM患者,其中86例并发ILD,按性别、年龄匹配40例正常人作为对照,采用酶联免疫吸附试验检测BAFF,分析其临床意义。结果与non-ILD组相比...目的探究B细胞刺激因子(BAFF)在特发性炎性肌病(IIM)相关肺间质病变(ILD)中的临床意义。方法纳入122例IIM患者,其中86例并发ILD,按性别、年龄匹配40例正常人作为对照,采用酶联免疫吸附试验检测BAFF,分析其临床意义。结果与non-ILD组相比,IIM-ILD组BAFF水平显著升高[2.19(1.07~4.54)ng mL vs.1.14(0.61~2.30)ng mL,P=0.005],是IIM-ILD的独立危险因素。抗MDA5抗体及抗合成酶抗体(ASA)阳性的IIM患者BAFF水平显著高于双阴性患者(P<0.05)。BAFF>3.74 ng mL时,对于诊断IIM-ILD的敏感性为36.0%,特异性为97.2%(AUC=0.681,P=0.002);联合KL-6时,对于诊断IIM-ILD的敏感性为82.6%,特异性为80.6%(AUC=0.868,P<0.001)。BAFF与铁蛋白呈正相关(r=0.368,P<0.001),与KL-6、肺部HRCT评分、肺功能无明显相关性。结论BAFF在IIM-ILD患者中显著升高,可作为IIM人群合并ILD的生物标志物。展开更多
为检测皮肌炎(dermatomyositis,DM)血清微小RNA(microRNA,miR)-150-5p的表达水平,探讨其与肌炎特异性自身抗体(myositis specific autoantibody, MSA)和不同临床表型的相关性,收集2011年3月至2016年2月在中日友好医院风湿免疫科住院治疗...为检测皮肌炎(dermatomyositis,DM)血清微小RNA(microRNA,miR)-150-5p的表达水平,探讨其与肌炎特异性自身抗体(myositis specific autoantibody, MSA)和不同临床表型的相关性,收集2011年3月至2016年2月在中日友好医院风湿免疫科住院治疗的DM患者血清49例,健康对照者血清30例,提取血清总RNA,采用实时荧光定量PCR检测血清miR-150-5p的相对表达水平,分析其与MSA和不同临床表型的相关性。结果显示,DM组患者血清miR-150-5p水平[4.37(2.49, 7.11)]低于健康对照组[10.67(1.59, 34.66),P=0.002],抗MDA5抗体阳性患者血清miR-150-5p水平(3.58±2.02)低于抗MDA5抗体阴性患者(6.19±5.27,P=0.017);抗核基质蛋白2(nuclear matrix protein 2, NXP2)抗体阳性患者血清miR-150-5p水平(2.89±2.00)低于抗NXP2抗体阴性患者(5.99±5.02,P=0.047)。不同间质性肺疾病(interstitial lung disease,ILD)组织学分型患者间血清miR-150-5p水平差异具有统计学意义(P<0.05)。提示miR-150-5p可能参与了DM自身抗体的致病过程。展开更多
Objectives: To correlate the precise specificity of autoantibodies in Japanese dermatomyositis (DM) patients with their clinical phenotypes. Methods: Serum samples from 94 adult DM patients (67 with classical DM and 2...Objectives: To correlate the precise specificity of autoantibodies in Japanese dermatomyositis (DM) patients with their clinical phenotypes. Methods: Serum samples from 94 adult DM patients (67 with classical DM and 27 with clinically amyopathic dermatomyositis, CADM) were screened for autoantibodies using immunoprecipitation assays. Patients with antibodies against aminoacyl transfer RNA synthetase (ARS), Mi-2 or who had other autoantibodies were assessed for clinical symptoms and laboratory findings. Results: Sera from 27 of 94 DM patients (29%) were found to have anti-ARS antibodies. Nineteen (20%) had anti-CADM-140/MDA5, 5 (5%) had anti-Mi-2, and 8 (6%) had anti-p155/TIF1-γ. Anti-MJ/NXP-2 was not found in our series of adult DM. Seventeen patients with anti-ARS had fever and 22 had arthritis and interstitial lung disease (ILD), compatible with a diagnosis of anti-ARS syndrome. Seventeen of 19 (89%) with anti-CADM-140/MDA5 had ILD, 16 (84%) of whom developed rapidly progressive ILD (RP-ILD). Four of 5 (80%) with anti-Mi-2 had heliotrope rash and/or Gottron’s sign/papules, and 2 (40%) had V-sign and/or shawl-sign rash, whereas no ILD or malignancy was detected. As seen with anti-Mi-2-positive patients, a low frequency of ILD (13%) was found in patients with anti-p155/TIF1-γ but 6 of 8 (75%) had malignancy during their course. The frequency of ILD was significantly higher in patients with anti-ARS or anti-CADM-140/MDA5 compared with anti-Mi-2 or anti-p155/TIF1-γ (81% and 89%, respectively). It should be noted that anti-CADM-140/MDA5-positive patients suffered significantly more RP-ILD compared to patients with anti-ARS (84% vs. 7%, P < 0.0001). On the other hand, anti-p155/TIF1-γ positive patients had a significantly higher rate of malignancy compared with anti-ARS-, anti-CADM-140/MDA5-and anti-Mi-2-positive patients (75% vs. 7%: P = 0.0004, 5%: P = 0.0006, 0%: P = 0.02, respectively). Conclusions: These results indicate that in addition to antibodies previously identified as specific for DM, autoantibodie展开更多
文摘目的:比较临床无肌病性皮肌炎(clinically amyopathic dermatomyositis,CADM)和皮肌炎(dermatomyositis,DM)的临床及免疫学特征。方法:选择2010年1月—2019年12月在北京大学人民医院风湿免疫科住院的106例CADM和158例DM患者的病例资料进行回顾性分析,对两组患者的临床及免疫学指标进行比较,探讨肌炎抗体在CADM和DM中的的分布特点及临床意义,其中,肌炎抗体的检测采用免疫印迹法。结果:在临床表现方面,与DM相比,CADM更多地以肺间质病变(interstial lung diseases,ILD)起病(20.7%vs.7.6%,P=0.002),且以急性ILD为主(58.3%vs.26%,P<0.001),而在皮疹、合并其他结缔组织病和恶性肿瘤等方面,CADM与DM差异无统计学意义,CADM类风湿因子和抗核抗体的阳性率均低于DM。CADM最常见的肌炎特异性抗体(myositis specific autoantibodies,MSAs)为抗黑色素瘤分化相关基因5(melanoma differentiation related genes,MDA5,36%)、抗PL-7(11.2%)及抗TIF-1γ(10.1%);DM最常见的MSAs为抗Jo-1(19.2%)、抗TIF-1γ(11.5%)及抗MDA5(11.5%)。抗MDA5与急性ILD及皮肤破溃相关,但在CADM中皮肤破溃与抗MDA5的滴度无关,而在DM中皮肤破溃与高滴度的抗MDA5相关。在DM中,抗TIF-1γ与向阳疹、V领/披肩征、甲周炎,以及合并恶性肿瘤相关,且合并恶性肿瘤的比例与抗TIF-1γ的滴度无关;在CADM中,抗TIF-1γ与临床表现及合并症无明显相关性。CADM及DM中最常见肌炎相关抗体均为抗Ro-52,抗Ro-52在CADM中与雷诺现象和慢性ILD相关,在DM中与技工手、发热,以及合并其他结缔组织病相关。结论:与DM相比,CADM-ILD以急性为主,肌炎抗体在CADM与DM中具有不同的分布特点;同一种肌炎抗体在CADM及DM中的临床意义也存在区别,且部分肌炎抗体的临床意义还与滴度相关。
文摘目的探究B细胞刺激因子(BAFF)在特发性炎性肌病(IIM)相关肺间质病变(ILD)中的临床意义。方法纳入122例IIM患者,其中86例并发ILD,按性别、年龄匹配40例正常人作为对照,采用酶联免疫吸附试验检测BAFF,分析其临床意义。结果与non-ILD组相比,IIM-ILD组BAFF水平显著升高[2.19(1.07~4.54)ng mL vs.1.14(0.61~2.30)ng mL,P=0.005],是IIM-ILD的独立危险因素。抗MDA5抗体及抗合成酶抗体(ASA)阳性的IIM患者BAFF水平显著高于双阴性患者(P<0.05)。BAFF>3.74 ng mL时,对于诊断IIM-ILD的敏感性为36.0%,特异性为97.2%(AUC=0.681,P=0.002);联合KL-6时,对于诊断IIM-ILD的敏感性为82.6%,特异性为80.6%(AUC=0.868,P<0.001)。BAFF与铁蛋白呈正相关(r=0.368,P<0.001),与KL-6、肺部HRCT评分、肺功能无明显相关性。结论BAFF在IIM-ILD患者中显著升高,可作为IIM人群合并ILD的生物标志物。
文摘Objectives: To correlate the precise specificity of autoantibodies in Japanese dermatomyositis (DM) patients with their clinical phenotypes. Methods: Serum samples from 94 adult DM patients (67 with classical DM and 27 with clinically amyopathic dermatomyositis, CADM) were screened for autoantibodies using immunoprecipitation assays. Patients with antibodies against aminoacyl transfer RNA synthetase (ARS), Mi-2 or who had other autoantibodies were assessed for clinical symptoms and laboratory findings. Results: Sera from 27 of 94 DM patients (29%) were found to have anti-ARS antibodies. Nineteen (20%) had anti-CADM-140/MDA5, 5 (5%) had anti-Mi-2, and 8 (6%) had anti-p155/TIF1-γ. Anti-MJ/NXP-2 was not found in our series of adult DM. Seventeen patients with anti-ARS had fever and 22 had arthritis and interstitial lung disease (ILD), compatible with a diagnosis of anti-ARS syndrome. Seventeen of 19 (89%) with anti-CADM-140/MDA5 had ILD, 16 (84%) of whom developed rapidly progressive ILD (RP-ILD). Four of 5 (80%) with anti-Mi-2 had heliotrope rash and/or Gottron’s sign/papules, and 2 (40%) had V-sign and/or shawl-sign rash, whereas no ILD or malignancy was detected. As seen with anti-Mi-2-positive patients, a low frequency of ILD (13%) was found in patients with anti-p155/TIF1-γ but 6 of 8 (75%) had malignancy during their course. The frequency of ILD was significantly higher in patients with anti-ARS or anti-CADM-140/MDA5 compared with anti-Mi-2 or anti-p155/TIF1-γ (81% and 89%, respectively). It should be noted that anti-CADM-140/MDA5-positive patients suffered significantly more RP-ILD compared to patients with anti-ARS (84% vs. 7%, P < 0.0001). On the other hand, anti-p155/TIF1-γ positive patients had a significantly higher rate of malignancy compared with anti-ARS-, anti-CADM-140/MDA5-and anti-Mi-2-positive patients (75% vs. 7%: P = 0.0004, 5%: P = 0.0006, 0%: P = 0.02, respectively). Conclusions: These results indicate that in addition to antibodies previously identified as specific for DM, autoantibodie
