抗环瓜氨酸肽抗体、抗角蛋白抗体、抗核周因子抗体和类风湿因子联合检测在老年类风湿性关节炎诊断中的意义

目的 探讨抗环瓜氨酸肽抗体(CCP)、抗角蛋白抗体(AKA)、抗核周因子抗体(APF)和类风湿因子(RF)联合检测在老年类风湿关节炎(RA)诊断中的应用价值.方法 分别采用酶联免疫、间接免疫荧光、斑点免疫荧光和免疫散射比浊法检测83例老年RA患者血清中抗CCP抗体、AKA、AFP和RF.结果 抗CCP抗体灵敏度为50.6%,特异性96.3%;AKA检测灵敏度为38.6%,特异性96.3%;APF检测灵敏度为57.8%,特异性95.3%;RF灵敏度为77.1%,特异性83.2%;抗CCP+AKA+APF+RF四种自身抗体联合检测灵敏度19.2%,特异性100%.结论 CCP、AKA、APF及RF四种抗体联合检测,提高了老年RA的诊断率.     

抗突变型瓜氨酸波形蛋白抗体葡萄糖-6-磷酸异构酶和抗环瓜氨酸多肽抗体检测在类风湿关节炎诊断中的价值

目的 了解抗突变型瓜氨酸波形蛋白(MCV)抗体、葡萄糖-6-磷酸异构酶(GPI)、抗环瓜氨酸多肽(CCP)抗体检测在类风湿关节炎(RA)诊断中的价值.方法 检测109例RA患者,24例其他风湿病患者及19名健康对照血清中抗MCV抗体、GPI和抗CCP抗体,比较3种抗体单独或联合检测对诊断RA的敏感性和特异性.结果 RA组抗MCV抗体和GPI阳性率及平均浓度显著高于其他风湿病组及健康对照组(P<0.05).抗CCP抗体与GPI阳性率在RA患者中的差异有统计学意义.抗MCV抗体对RA敏感性最高(99.1%);抗CCP抗体对RA特异性最高(90.7%);联合检测以MCV+CCP、MCV+GPI以及MCV+CCP+GPI特异件最高(均为98.1%).结论 单独或联合检测抗MCV抗体、抗CCP抗体和GPI,有助于提高RA诊断的敏感性和特异性.     

三种抗瓜氨酸抗体诊断类风湿性关节炎的临床价值研究

目的研究血清中抗核周因子(APF)、抗角蛋白抗体(AKA)及抗环瓜氨酸多肽(CCP)抗体在类风湿性关节炎(RA)诊断中的意义。方法随机选择2006年1月至2009年8月于北京大学人民医院风湿免疫科住院的RA患者500例,应用酶联免疫吸附法检测抗CCP抗体,间接免疫荧光法检测APF和AKA,分析比较3种抗体在RA诊断中的敏感度及其与临床特点及免疫学指标的关系。结果 (1)500例RA患者中抗CCP、APF和AKA抗体诊断的敏感度分别为70.8%、51.8%和45.0%,其中抗CCP抗体敏感度明显优于APF和AKA(P<0.01)。(2)在146例抗CCP阴性的患者中APF的诊断敏感度高于AKA抗体,但差异无统计学意义(16.4%对8.9%,P=0.059)。(3)抗CCP抗体和APF抗体阳性RA患者的关节肿痛数、DAS28评分均明显高于抗体阴性患者(P均<0.001);AKA抗体阳性患者DAS28评分也明显高于AKA阴性患者(P=0.02);APF和AKA抗体阳性患者年龄较抗体阴性患者明显增高(P均<0.05),而抗CCP抗体与年龄无关(P=0.88)。(4)抗CCP抗体阳性患者ESR、IgA、IgM、IgG、RF-IgG、RF-IgM、RF-IgA水平均明显高于抗体阴性组(P均<0.05);与APF抗体阴性患者比较,APF抗体阳性者具有较高的红细胞沉降率(ESR)、IgA、IgG、RF-IgG、RF-IgM、RF-IgA水平(P均<0.05);AKA抗体阳性仅与RF-IgG、RF-IgA明显相关(P=0.02),而与ESR及免疫球蛋白无关(P均>0.05)。结论抗CCP抗体在RA诊断中的敏感度和与病情活动度的相关性均优于APF抗体,APF优于AKA抗体。     

多种自身抗体在老年类风湿关节炎诊断中的临床应用价值

目的：探讨抗环瓜氨酸（CCP）抗体、抗角蛋白（AKA）抗体、抗核周因子（APF）和RA33抗体在老年起病类风湿关节炎（EORA）诊断和鉴别诊断中的临床意义。方法：对95例EORA（EORA组）、69例风湿性多肌痛（PMR）患者（PMR组）和47例健康者（对照组）进行抗CCP抗体、AKA、APF和RA33抗体检测,其中抗CCP抗体和RA33抗体采用酶联免疫吸附法（ELISA法）检测,AKA和APF采用间接免疫荧光法（ⅡF）法检测。结果：①抗CCP抗体、AKA、APF和RA33抗体在EORA组的敏感性和特异性分别为（58．9％、95．8％）、（33．7％、91．4％）、（31．6％、89．4％）和（36．8％、86．7％）,显著高于PMR组和对照组（P〈0．01）。②EORA组抗CCP抗体的敏感性显著高于AKA、APF和RA33抗体（P〈0．05）。联合检测4种抗体,敏感性有所降低,但使阳性率提高至98．9％,且有更高的阳性预测值。③69例PMR患者中有6例患者CCP抗体阳性,3例AKA阳性,且与CCP抗体相重叠,2例APF阳性,2例RA33阳性,1年后3例重叠阳性的PMR患者确诊为EORA。结论：PMR与EORA有相似的临床症状和特征,临床上有时难以鉴别,极少数病例,在早期不典型时易误诊,但抗CCP抗体、AKA、APF和RA33抗体仍主要出现在EORA患者中,尤其抗CCP抗体有较高的敏感性和特异性,4种抗体联合检测有更高的特异性和阳性预测值,同时结合临床症状、影像学改变等,4种抗体联合检测对EORA的诊断和鉴别诊断有很高的临床应用价值。     

三种自身抗体联合检测在老年起病类风湿关节炎诊断中的作用

目的 研究抗环瓜氨酸肽(cyclic citrulinated peptid,CCP)抗体、抗角蛋白抗体(anti-keratin antibody,AKA)和抗RA33抗体在老年起病的类风湿关节炎(EORA)中的临床意义,探讨3种自身抗体联合检测在EORA诊断中的作用. 方法 检测69例EORA、73例风湿性多肌痛(PMR)和65例老年骨关节炎(0A)患者体内3种抗体水平,抗CCP抗体和抗RA33抗体采用酶联免疫吸附试验法(ELISA),AKA采用间接免疫荧光法(IIF)检测. 结果 EORA患者3种抗体的敏感性和特异性分别为55.1%和94.3 0A、31.3%和91.5%、36.2%和95.4%,显著高于其他两组(P<0.05).3种抗体串联检测,EORA组的阳性率显著高于PMR组和OA组(均为P<0.05),3种抗体串联检测敏感性降低,但其特异性提高至100.0%,且有更高的阳性预测值. 结论 抗CCP抗体、AKA和抗RA33抗体在EORA患者中均可检出,抗CCP抗体有较高的敏感性和特异性,3种抗体联合检测有更高的特异性和阳性预测值;结合临床症状、影像学改变,3种抗体联合检测对EORA的诊断具有较高的临床应用价值.     

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。     

自身抗体阳性的未分化关节炎向类风湿关节炎转化的预测价值

目的 探讨类风湿因子(RF)、抗角蛋白抗体(AKA)、抗环瓜氨酸肽(CCP)抗体、抗核周因子(APF)4种自身抗体对未分化关节炎(UA)转化为类风湿关节炎(RA)的临床预测价值,并分析其临床相关因素.方法 对271例UA患者随访1年,采用免疫比浊法检测RF,酶联免疫吸附试验(ELISA)检测抗CCP抗体,间接免疫荧光法(IIF)检测APF与AKA,魏氏法测定红细胞沉降率(ESR),记录患者的晨僵时间、关节肿胀数、关节压痛数、不同关节受累及DAS28评分.结果 4种抗体均阳性的UA患者转化为RA的阳性率为99%;任2种及2种以上抗体阳件的UA患者转化为RA的敏感性83.0%,特异性65.9%;RF/抗CCP抗体阳性的UA患者转化为RA的敏感性77.8%,特异性80.5%;抗体均阴性和任1、2、3种抗体阳性及4种抗体全阳性患者的多关节肿胀及多个小关节受累的比率分别为48%、57%、59%、70%、70%和71%、71%、72%、76%、82%;抗体阴性的UA患者中肘关节受累所占比例最大,为72%;多关节肿胀及多个小关节受累在UA转化为RA与无多关节肿胀及多个小关节受累的转化率最大.结论 4种抗体联合检测可提高RA早期诊断的特异性,阳性抗体越多.UA越容易发展为RA;RF/抗CCP抗体阳性的UA患者转化为RA的敏感性和特异性均较高.多关节肿胀和多个小关节受累对评估RA病情有重大意义.     

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.     

抗瓜氨酸肽抗体谱在幼年类风湿关节炎诊断中的意义

目的探讨抗环瓜氨酸肽抗体（抗CCP抗体）、类风湿因子（RF）、抗核周因子（APF）、抗角蛋白抗体（AKA）对幼年类风湿关节炎（JRA）诊断的意义，并与类风湿关节炎（RA）进行比较。方法分别采用酶联免疫吸附试验（ELISA）、胶乳凝集法、间接免疫荧光法检测54例JRA患者、31例非RA对照组、116例成人RA患者血清中的抗CCP抗体、RF、APF、AKA。结果54例JRA患者抗CCP抗体、RF、APF、AKA的敏感性分别为61．1％、57．4％、37．0％、18．5％，特异性分别为96．8％、93．6％、96．8％、100％。抗CCP抗体与RF在JRA的敏感性差异无统计学意义，但明显高于APF、AKA;4种抗体在JRA的特异性比较差异无统计学意义。RA患者中4种抗体敏感性分别为82．3％、78．3％、48．7％、25．4％，特异性分别为95．7％、7．3．7％、91．6％、94．0％。4种抗体在JRA诊断中的敏感性均明显低于RA组，RF在JRA患者中特异性明显高于RA患者，而其他3种抗体的特异性在两组患者比较差异无统计学意义。结论虽然抗CCP抗体谱在JRA诊断中的敏感性不及RA组，但对JRA的诊断仍具有较好的敏感性和特异性，可用于JRA的诊断。     

抗环瓜氨酸肽抗体与抗Sa抗体联合检测对类风湿关节炎的意义

类风湿关节炎 (rheumatoidarthritis,RA)是一种致畸性疾病 ,3年内 70 %的患者出现骨关节影像学改变 ,早期诊断早期给予缓解病情药可以减少骨关节破坏并改善预后。自从 196 4年发现抗核周因子 (APF)是RA的特异性抗体后 ,又陆续发现抗角蛋白抗体 (AKA)、抗纤聚蛋白抗体 (AFA)以及抗Sa抗体[1,2 ] 、抗环瓜氨酸肽抗体[3 ] (抗CCP抗体 )。有资料表明 ,抗Sa抗体对RA的敏感性 37%～ 4 3% ,抗CCP抗体对RA的敏感性 4 0 %～ 5 0 % ,将两者联合检测能否提高诊断敏感性及特异性 ?本文将探讨抗Sa抗体与抗CCP抗体的相关性及联合诊断对RA的意…     

Second generation anti-cyclic citrullinated peptide (anti-CCP2) antibodies can replace other anti-filaggrin antibodies and improve rheumatoid arthritis diagnosis

We compared the diagnostic performance of anti-cyclic citrullinated peptide antibodies detected with second-generation enzyme immunoassay (anti-CCP2) with that of IgM-rheumatoid factor (RF), anti-perinuclear factor (APF), and anti-keratin antibodies (AKA). The sensitivity of anti-CCP2 was better than that of APF and AKA: they were detected in 25% rheumatoid arthritis (RA) patients without detectable APF or AKA. Their specificity, evaluated in other inflammatory rheumatic disease, was similar to that of APF and AKA. Despite the lower specificity, IgM-RF in combination with anti-CCP2 is interesting, as they do not completely overlap. Anti-CCP2 antibody detection seems to be a good alternative to other anti-filaggrin antibodies in the diagnosis of RA.     

四种抗体联合检测在类风湿关节炎早期诊断中的应用价值

目的 探讨抗核周因子抗体(APF)、抗角蛋白抗体(AKA)、类风湿因子(RF)、抗环瓜氨酸肽抗体(抗-CCP抗体)联合检测在类风湿关节炎(RA)早期诊断中的临床应用价值。方法 对RA患者127例、非RA其他风湿病患者102例及正常对照组43例，采用速率散射免疫比浊法检测RF；酶联免疫吸附法定量检测抗-CCP抗体；免疫荧光法检测AKA、APF，并采用四格表法计算敏感度及特异性。结果RA组的RF、APF、AKA、抗-CCP抗体敏感度分别为65．4％、48．8％、32．3％、83．5％，特异性分别为73．5％、92．2％、93．1％、94．1％，同时出现三种抗体和四种抗体的特异性为99．0％、100％；非RA组无四种抗体同时出现的情况。结论 RF敏感性较高，但特异性较差；APF、AKA、抗-CCP抗体三种自身抗体对RA具有高度特异性，且在RA早期即可出现。四种抗体联合检测有助于提高RA的早期诊断率。     

Diagnostic value of anti-cyclic citrullinated Peptide antibody in patients with rheumatoid arthritis

OBJECTIVE: To explore the diagnostic value of anti-cyclic citrullinated peptide antibody (anti-CCP) detected by ELISA in patients with rheumatoid arthritis (RA). METHODS: The synthesized cyclic citrullinated peptide was used as substrate for ELISA. Anti-CCP antibody was detected by ELISA in 191 patients with RA, 132 with rheumatic diseases other than RA, and 98 with nonrheumatic diseases. The antiperinuclear factor (APF), anti-keratin antibody (AKA), rheumatoid factor (RF), and HLA-DR4 gene complex were also tested in each RA patient. The results of these tests were compared with anti-CCP antibody to examine the correlation between them. RESULTS: Ninety (47.1%) patients with RA, 4 (3.0%) with other rheumatic diseases, and 2 (2.0%) with nonrheumatic diseases were found to be anti-CCP antibody positive by ELISA. The sensitivity of anti-CCP antibody was 47.1%, with a high specificity (97.4%) in RA. Anti-CCP antibody correlated with APF, AKA, RF, and HLA-DR4 gene complex. CONCLUSION: A new modified anti-CCP antibody test had a moderate sensitivity (47.1%) but a high specificity (97.4%) in patients with RA and was found as a valuable supplement to diagnosis of RA. Anti-CCP correlated with APF, AKA, RF, and HLA-DR4 gene complex, but did not completely overlap with them. Anti-CCP antibody could be regarded as a new diagnostic marker for RA.     

Value of antibodies to citrulline-containing peptides for diagnosing early rheumatoid arthritis

OBJECTIVE: To compare the diagnostic values of antiperinuclear factor (APF), antikeratin antibody (AKA), and anti-cyclic citrullinated peptides (anti-CCP) to discriminate between patients with and without rheumatoid arthritis (RA) and to determine the diagnostic value of anti-CCP used alone or with other tests. METHODS: Two hundred and seventy patients with early arthritis underwent standardized investigations in 1995-1997. The clinical utility of APF, AKA, and anti-CCP in first-visit sera was evaluated using receiver-operating characteristic curves. Combinations of anti-CCP with other laboratory tests were assessed by multiple logistic regression. RESULTS: Anti-CCP, APF, and AKA were not perfectly correlated with one another. Anti-CCP with 53 UI as the cutoff was 47% sensitive and 93% specific, versus 52% and 79%, and 47% and 94%, for APF and AKA, respectively. Multiple logistic regression selected anti-CCP, AKA, IgM-rheumatoid factor (RF) ELISA, and the latex test. CONCLUSION: Rheumatologists can routinely use 2 or 3 tests for diagnosing RA (latex and/or IgM RF ELISA, and either AKA or anti-CCP ELISA) and can add a third or fourth test when the diagnosis remains in doubt.     

抗瓜氨酸化蛋白／肽抗体对类风湿关节炎的诊断价值

目的探讨4种抗瓜氨酸化蛋白，肽抗体（anti-citrufllinated protein／peptide autoantibodies，ACPAs）-抗核周因子（anti-perinuclear fator，APF）、抗角蛋白抗体（anti-keratin antibody，AKA）、抗角蛋白微丝聚集蛋白抗体（antiprofillagrin／fillagrin antibody，AFA）、第二代抗环瓜氨酸肽抗体（second generation of anti-cylic citrulline peptide antibody，CCPⅡ）对类风湿关节炎（rheumatoid arthritis，RA）的诊断意义及其结果的一致性。方法 对129例RA、153例其他风湿性疾病患者和94名健康对照者的血清进行类风湿因子（rheumatoid factor，RF）和ACPAs检测。RF采用乳胶间接凝集法检测。APF和AKA采用间接免疫荧光法检测，AFA、抗CCP（Ⅱ）抗体采用酶联免疫吸附法检测。结果APF、AKA、AFA和抗CCP（Ⅱ）抗体对RA的诊断特异性分别为90.3％、94．7％、93．5％和94．7％，敏感性分别为58．1％、40.3％、62．0％和67．4％；而RF的诊断特异性和敏感性为77．7％和46．5％。APF与AFA、APF与抗CCP（Ⅱ）和AFA与抗CCP（Ⅱ）抗体间检测结果一致性较好，Kappa值分别是0．596、0．572和0．576。结论ACPAs是RA的诊断特异性抗体，其中抗CCP（Ⅱ）抗体的敏感性和特异性最高，且与APF和AFA抗体间结果具有明显的一致性。     

Antibodies to citrullinated peptides in tuberculosis

Rheumatoid arthritis (RA) is an autoimmune disease characterized by symmetric polyarthritis, rheumatoid factor (RF) positivity, and bone erosions. Recently, research has been conducted on anti-citrullinated peptide antibodies (ACPAs) to which there are greater sensitivity and specificity than RF. However, these antibodies have also been described in infectious diseases, particularly tuberculosis (TB), placing the high specificity of the test in doubt. The aim of this research was to study the prevalence of ACPAs in TB, RA, and healthy controls. Patients with bacteriologically confirmed pulmonary tuberculosis, RA (ACR criteria), in addition to healthy controls were included. ACPAs were researched by: anti-cyclic citrullinated peptide (CCP), anti-modified citrullinated vimentin (MCV), and RF by ELISA. The study was conducted in 50 TB patients, 50 with RA, and 20 controls. Anti-CCP antibodies were found in 39 (78 %) of the RA patients (median titer, 128 U), whereas anti-MCV antibodies were found in 25 (50 %). Of the patients with TB, two (4 %) had positivity for anti-CCP and anti-MCV and no patient in the control group tested positive for these antibodies. Sensitivity of anti-CCP for RA was 78 % (confidence interval (CI), 63 to 88 %) and specificity was 97 % (CI, 89 to 99 %) while the sensitivity of anti-MCV was 50 % (CI, 35–64 %) and specificity was 97 % (CI, 89 to 99 %). RF was positive in 40 samples (80 %) of RA, in 30 (60 %) of TB, and in 1 (5 %) of the controls. Our findings showed high sensitivity of anti-CCP and high specificity of both anti-CCP and anti-MCV antibodies for RA, even in a population with high incidence of tuberculosis. The higher frequency of positivity of ACPA in TB observed in previous studies may be attributed to methodological factors.     

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。