抗环瓜氨酸多肽抗体检测早期诊断类风湿关节炎研究

目的探讨抗环瓜氨酸多肽(CCP)抗体检测对类风湿关节炎(RA)早期诊断的意义。方法应用ELISA法检测2004—2005年中国医科大学附属盛京医院150份人血清的抗CCP抗体,包括54例RA患者,80例其它风湿病患者,16名正常人;并分析抗CCP抗体与类风湿因子(RF)、C反应蛋白(CRP)、血沉(ESR)的相关性。结果抗CCP抗体对RA的敏感性和特异性分别为70·4%和93·8%。发病2年内与2年以上的抗CCP抗体阳性率差异无显著性。抗CCP抗体阴性组与阳性组的关节畸形率差异无显著性。抗CCP抗体与RF、CRP、ESR无相关性。结论抗CCP抗体对RA具有较好的敏感性和很高的特异性,联合抗CCP抗体和RF可以提高诊断的准确性,对RA的早期诊断具有重要意义。     

抗环瓜氨酸肽抗体在类风湿关节炎中的意义

目的探讨抗环瓜氨酸肽(CCP)抗体在类风湿关节炎(RA)诊断治疗中的意义。方法采用酶联免疫吸附试验(ELISA)法分别测定40例RA患者、56例其他风湿病患者的抗CCP抗体、类风湿因子IgM-RF、IgG-RF及类风湿因子(RF),同时比较20例RA患者治疗前后抗CCP抗体的水平变化。结果(1)RA组的抗CCP抗体水平显著高于其他风湿病组(P<0.01),抗CCP抗体对RA的敏感性和特异性分别为80%、85.7%,与RF比较其特异性、阳性预测值之间差异有显著性(P均<0.05)。(2)抗CCP抗体与IgM-RF、IgG-RF联合检测中,二项联合检测的特异性为96.4%,三项联合检测的特异性为98.2%,与单独检测抗CCP抗体、RF有更高的特异性。(3)20例RA患者治疗后抗CCP抗体水平显著下降(P<0.05)。结论抗CCP抗体对RA诊断具有良好的敏感性和特异性,可用于RA的临床诊断。抗CCP抗体与IgM-RF、IgG-RF联合检测可提高RA的早期诊断率。抗CCP抗体还可作为临床活动指标之一。     

血清抗CCP抗体、抗RA33抗体在类风湿关节炎诊断中的价值

检测75例类风湿关节炎(RA)患者(RA组)、54例非RA风湿病患者(非RA组)及40例健康人(对照组)血清中抗环瓜氨酸肽(CCP)抗体(简称抗CCP)、抗RA33抗体(简称抗RA33)水平,并与类风湿因子(RF)比较.结果RA组抗CCP、抗RA33和RF的阳性率及滴度均明显高于其他两组;抗CCP、抗RA33对RA的敏感性较RF低,特异性较RF高.抗CCP与RF诊断一致性好,抗RA33与RF诊断一致性差.认为抗CCP和抗RA33有助于不典型RA(特别是RF阴性的RA)的诊断,在一定程度上可弥补RF对RA诊断不足.三种抗体联合检测可提高RA的诊断率.     

类风湿关节炎患者抗CCP抗体检测及与其他实验室指标的关系

目的探讨抗环瓜氨酸肽抗体（抗CCP抗体）在类风湿关节炎（RA）中的诊断价值。方法选择RA患者116例、其他自身免疫病患者79例、健康对照者50例,采用ELISA法行抗CCP抗体检测,并检测RA患者的相关实验室指标。结果抗CCP抗体诊断特异性（94.58%）高于类风湿因子（RF）（68.22%）。进行抗CCP抗体、RF联合检测时,以任一项指标阳性的敏感性高于两者均阳性的敏感性（P〈0.05）。抗CCP抗体阳性的RA患者C反应蛋白（CRP）、血沉（ESR）均高于阴性者（P〈0.01）。结论抗CCP抗体在RA诊断中具有较高特异性,以抗CCP抗体或RF任一种阳性为诊断指标有利于早期诊断RA。抗CCP抗体阳性可能与RA活动性相关。     

用受试者工作曲线评价抗环瓜氨酸肽抗体对诊断类风湿关节炎的价值

目的评价抗环瓜氨酸肽抗体(抗CCP抗体)在类风湿关节炎(RA)诊断中的价值。方法收集110例RA患者,与38例其他疾病患者以及36名正常人作为对照,应用受试者工作曲线(re-ceiveroperativecharacteristiccurve,ROC)分析软件评价抗CCP抗体在RA诊断中的价值,在ROC曲线上制定抗CCP抗体与类风湿因子(RF)各亚型在诊断RA中的最佳临界点。用四格表计算系列试验的特异度,进行统计学检验。用SPSS软件比较抗CCP抗体与RF各亚型之间的相关性。结果在诊断RA中,抗CCP抗体的ROC曲线下的面积(AUCROC)明显大于RF(IgA、IgM、IgG)AUCROC(P<0.01),抗CCP抗体联合任何一个RF亚型的系列试验的特异度高达100%。抗CCP抗体和RF(IgA、IgM、IgG)经Spearman相关分析,呈正相关。结论抗CCP抗体对RA有较高的诊断价值;诊断RA的系列试验中,含抗CCP抗体的系列试验的特异度高。     

三种抗体对老年类风湿关节炎患者的诊断作用比较

<正>目前在类风湿关节炎(RA)的诊断标准中,类风湿因子(RF)是唯一的血清学指标,但由于RF特异性低,早期检出率不高,给RA的诊断特别是早期诊断带来难度。目前瓜氨酸相关自身抗体系统中抗角蛋白抗体(AKA)对RA诊断具有高特异性〔1,2〕,以环瓜氨酸肽(CCP)为抗原的酶联免疫吸附试验(ELISA)更显示出在RA诊断中具有高度特异性〔3,4〕。本研究探讨血清中的抗CCP、RF、AKA抗体在RA临床诊断中的价值。     

抗环瓜氨酸肽抗体在类风湿关节炎诊断中的意义及对关节侵蚀预测的价值

目的研究抗环瓜氨酸肽抗体(抗CCP抗体)在类风湿关节炎(RA)诊断中的意义及与关节侵蚀的关系。方法检测84例RA患者抗CCP抗体、抗角蛋白抗体(AKA)、类风湿因子(RF),评价三者诊断RA的价值。将75例RA患者分为轻微关节侵蚀组41例(第1组)和严重关节侵蚀组34例(第2组),分析与RA关节侵蚀相关的因素。结果3种抗体诊断RA的敏感性和特异性分别为:抗CCP抗体(49%,94%)、AKA(50%,93%)、RF(79%,67%);三者两两组合后诊断RA的特异性增高。三者在第2组中的阳性率明显高于第1组(P<0.05)。抗CCP抗体阳性患者更易出现关节侵蚀(OR=6.71)。多因素分析表明抗CCP抗体、AKA、C反应蛋白(CRP)、类风湿结节与关节侵蚀有关,其中类风湿结节权重最大(OR=12.07)。结论抗CCP抗体是RA良好的诊断指标,并且与关节侵蚀密切相关。抗CCP抗体与AKA、RF联合使用可进一步提高诊断的准确性。对关节侵蚀的多种危险因素进行综合评价有助于判断RA的预后。     

血清抗角蛋白抗体抗环瓜氨酸肽抗体和类风湿因子在类风湿关节炎中的意义

目的 评价抗角蛋白抗体(AKA)、抗环瓜氨酸肽(CCP)抗体和类风湿因子(RF)在类风湿关节炎(RA)中的意义.方法 收集82例RA患者及56例非RA患者,测定其抗CCP抗体、AKA和RF水平,评价对RA诊断的敏感性、特异性,比较RA患者中抗CCP抗体、AKA阳性组和阴性组的压痛关节数、肿胀关节数、红细胞沉降率(ESR)、C反应蛋白(CRP)、疾病活动指数(DAS)、Ritchie's指数(RAI).结果 单独检测AKA、抗CCP抗体、RF及联合检测的曲线下面积都较高(P<0.05).抗CCP抗体、AKA的特异度分别为92.9%、91.1%,联合检测AKA、抗CCP抗体和RF有任何一种及以上阳性的灵敏度最高,为95.1%.抗CCP抗体阳性组与阴性组的关节肿胀数、关节压痛数、ESR、CRP、DAS、RAI差异有统计学意义(P<0.05);AKA阳性组与阴性组的关节肿胀数、ESR、DSA差异均有统计学意义(P<0.05).结论 联合检测抗CCP抗体、RF、AKA对诊断RA有意义,抗CCP抗体、AKA可能与RA的活动度相关.     

RF、AKA、APF、抗CCP抗体联合检测对老年类风湿关节炎的诊断价值

目的研究类风湿因子(RF)、抗环瓜氨酸(CCP)抗体、抗角蛋白抗体(AKA)、抗核周因子抗体(APF)对老年类风湿关节炎(RA)的诊断价值。方法 RA患者480例为RA组,非RA自身免疫病患者300例为非RA组,健康组300例,对受检者进行RF、抗CCP抗体、AKA、APF检测。结果 RA组分别与非RA组和健康组比较,4种检测标志物阳性检出率均有显著性差异(P0.05)。单项指标比较,RF有较高的灵敏度,但特异性明显低于其他3个指标(P0.05),AKA、APF虽有较高的特异度,但灵敏度低(P0.05),抗CCP抗体有较高的灵敏度和特异度。对RA组各指标联合检测,以上指标任意2个组合比3项(抗CCP抗体+RF+APF,抗CCP抗体+RF+AKA)、4项(抗CCP抗体+RF+APF+AKA)联合检测敏感度低(P0.05),而特异度均较高,但没有明显差异(P0.05)。4项联合检测灵敏度及特异度达到最高。结论单项指标比较,抗CCP抗体有较高的灵敏度和特异度。联合指标比较,以抗CCP抗体+RF+APF或抗CCP抗体+RF+AKA3项联合检测模式诊断RA具有较高的价值,便于临床医师早期确诊,减少漏诊误诊病例。     

抗环瓜氨酸多肽抗体检测早期诊断类风湿关节炎研究

目的探讨抗环瓜氨酸多肽（CCP）抗体检测对类风湿关节炎（RA）早期诊断的意义。方法应用ELISA法检测2004-2005年中国医科大学附属盛京医院150份人血清的抗CCP抗体，包括54例RA患者，80例其它风湿病患者，16名正常人；并分析抗CCP抗体与类风湿因子（RF）、C反应蛋白（CRP）、血沉（ESR）的相关性。结果抗CCP抗体对RA的敏感性和特异性分别为70．4％和93．8％。发病2年内与2年以上的抗CCP抗体阳性率差异无显著性。抗CCP抗体阴性组与阳性组的关节畸形率差异无显著性。抗CCP抗体与RF、CRP、ESR无相关性。结论抗CCP抗体对RA具有较好的敏感性和很高的特异性，联合抗CCP抗体和RF可以提高诊断的准确性，对RA的早期诊断具有重要意义。     

Is measurement of IgM and IgA rheumatoid factors (RF) in juvenile rheumatoid arthritis clinically useful?

The prevalence and clinical relevance of IgM and IgA RF detected by ELISA were studied in 91 patients with juvenile rheumatoid arthritis (JRA) and 45 healthy children. IgM and IgA RF were detected, respectively, in 33 and 44% of the patients, compared to 6.7 and 15.6% of the healthy children (p = 0.001 and 0.0006, respectively). The frequency of IgM RF was significantly higher in patients with polyarticular (52%) as compared to systemic onset JRA (21%; p = 0.04). Five out of ninety-one patients and none of the control group were IgM RF positive by the latex test. High levels of IgM RF were detected more frequently in patients with active disease (p = 0.01) and positive latex agglutination test (p < 0.001) and had a marginally significant association with severe radiological deformities (p = 0.05). The presence of IgA RF was associated with active disease in polyarticular onset JRA children (p = 0.04). In conclusion, high levels of IgM RF and the detection of IgA RF can be useful in assessing clinical activity in a subset of patients with JRA.     

Clinical and psychosocial factors associated with depression and anxiety in Singaporean patients with rheumatoid arthritis

Aim: To assess the frequency of, and factors associated with, depression and anxiety in Singaporean patients with rheumatoid arthritis (RA). Method: One hundred RA patients were recruited in a cross‐sectional study. Socio‐demographics, severity of anxiety and depression, disease activity, levels of serological markers and health‐related quality of life were analyzed. Results: Twenty‐six percent presented with anxiety, 15% with depression and 11% with both. Univariate regression showed that age (P = 0.039), Disease Activity Scale (DAS‐28) (P < 0.001), number of medications (P < 0.001) and rheumatoid factor (RF) (P < 0.001) were positively associated with severity of depression, while income (P = 0.001), education (P = 0.029), self‐perceived social support (P = 0.007), Short form 12 (SF‐12) physical health (P < 0.001) and SF‐12 mental health (P < 0.001) were negatively associated with severity of depression. After adjustment for confounding factors in multivariate regression, income (β = ?0.347, P = 0.018), RF (β = 0.304, P = 0.043) and SF‐12 mental health (β = ?0.501 P = 0.001) remained significantly associated with depression. Univariate regression showed that DAS‐28 (P = 0.009), number of medications (P = 0.004) and RF (P = 0.043) were positively associated with anxiety, while income (P = 0.022), self‐perceived social support (P = 0.04), SF‐12 physical health (P < 0.001) and SF‐12 mental health (P < 0.001) were negatively associated with anxiety. After adjustment for confounding factors, no factors remained significantly associated with anxiety. Conclusion: Low income, high levels of RF and poor mental health were associated with depression in RA. Our findings may help to formulate depression screening strategies. Further research is required to identify the role of RF in depression.     

Comparative study of anti‐CCP and RF for the diagnosis of rheumatoid arthritis

Aim: To determine the frequency of anti‐cyclic citrullinated peptide antibody (anti‐CCP) in a group of patients with rheumatoid arthritis and another group with other rheumatic diseases. Patients and methods: Anti‐CCP1 and rheumatoid factor (RF) titres were determined in 320 serum samples; 136 from RA patients, 184 from control patients (165 patients with rheumatic diseases other than RA, and 21 patients with lymphoproliferative diseases). Results: The sensitivity of Anti‐CCP was 62.5% (95% CI: 53–70%) for the diagnosis of RA with a specificity of 89.1% (95% CI: 83–93%). The sensitivity of RF was 85.3% (95% CI: 79–91%). The specificity was 64.7% (95% CI: 57–71%). Conclusions: Anti‐CCP1 has not very high specificity for RA regarding other rheumatic disease. However it is still very helpful for the diagnosis of RA.     

Prediction of postpartum onset of rheumatoid arthritis

OBJECTIVE—To investigate the prediction of the postpartum onset of rheumatoid arthritis (RA).
METHODS—Two thousand five hundred and forty seven healthy pregnant subjects were examined prospectively and the relation between serum rheumatoid factors (RF) and postpartum onset of RA was observed. Rheumatoid factors were measured in early pregnancy by the antihuman IgG latex agglutination test (Latex test) and antirabbit IgG haemagglutination test (RAHA test).
RESULTS—Latex test and RAHA test were positive in 26 (1.0%) and 64 (2.5%) pregnant subjects, respectively. Four hundred and ten subjects of 2547 pregnant women could be followed up for one year after delivery. None of 401 subjects without RF, or with only one RF on either Latex test or RAHA test, developed RA after delivery. Two (22.2%) of nine subjects with both RFs developed RA at one and three months postpartum, respectively. Transient arthralgia was found within 12 months postpartum in three of nine (33.3%) subjects with both RFs and this prevalence was significantly higher than that in RF negative subjects (8.1%).
CONCLUSION—Postpartum onset of RA was found in at least 2 of 2547 healthy subjects (0.08%) and onset was predicted by positive test for rheumatoid factors.

Keywords: rheumatoid arthritis; pregnancy; postpartum onset; rheumatoid factor     

IgG rheumatoid factor in early rheumatoid arthritis as a predictor of radiological changes and disease activity

Our objective was to confirm whether IgG rheumatoid factor (IgG RF) assessed in early rheumatoid arthritis (RA) could be a prognostic factor of disease activity and articular destruction. The IgG RF index was assessed by a kit (Eitest IgG RF) in 46 patients with early RA (disease duration less than 1 year). Damage score (DS), carpal height ratio (CHR), clinical variables, and conventional RF values were evaluated at the initial visit and 2–3 years (average 2.5 years) after the initial visit. The incidence of IgG RF was 23.9% at the initial visit. Patients with positive IgG RF showed higher DS and higher Lansbury’s index in the final observation. They also showed a greater increase of DS and a greater decrease of CHR. The IgG RF index correlated with the final DS and final Lansbury’s index. We conclude that although the incidence was low, the IgG RF index in early RA could be a prognostic factor in radiographic changes and disease activity 2–3 years after the initial visit.     

IgG rheumatoid factor in early rheumatoid arthritis as a predictor of radiological changes and disease activity

Abstract

Our objective was to confirm whether IgG rheumatoid factor (IgG RF) assessed in early rheumatoid arthritis (RA) could be a prognostic factor of disease activity and articular destruction. The IgG RF index was assessed by a kit (Eitest IgG RF) in 46 patients with early RA (disease duration less than 1 year). Damage score (DS), carpal height ratio (CHR), clinical variables, and conventional RF values were evaluated at the initial visit and 2–3 years (average 2.5 years) after the initial visit. The incidence of IgG RF was 23.9% at the initial visit. Patients with positive IgG RF showed higher DS and higher Lansbury’s index in the final observation. They also showed a greater increase of DS and a greater decrease of CHR. The IgG RF index correlated with the final DS and final Lansbury’s index. We conclude that although the incidence was low, the IgG RF index in early RA could be a prognostic factor in radiographic changes and disease activity 2–3 years after the initial visit.     

Managing comorbidity in patients with rheumatoid arthritis

Rheumatoid arthritis (RA) is a chronic inflammatory disease that decreases physical function and imposes substantial medical costs. Comorbid conditions are common in patients with RA and they adversely affect quality of life and RA‐related outcomes such as work disability and mortality. Rheumatologists have the important responsibility to consider comorbidities and their risks when treating patients and to adapt therapies to the specific situation of individual patients. This paper discusses the common comorbidities in patients with RA and management approaches.