anti-CCP Titers Research Articles

Anti-citrullinated protein antibodies are associated with osteopenia but not with pain at diagnosis of rheumatoid arthritis: data from the BARFOT cohort

BackgroundAnti-citrullinated protein antibodies (ACPA) have been suggested to have a potential role in both bone loss and pain in rheumatoid arthritis (RA), based on studies in vitro and in animal models. Here we addressed if anti-cyclic citrullinated (anti-CCP) antibodies were associated with osteopenia or pain in patients with RA, at the time for diagnosis.MethodsBaseline data from the BARFOT (Better Anti-Rheumatic PharmacOTherapy) cohort, which consists of patients with RA with a disease duration of 1 year or less, were analyzed. To be included, they should have been assessed by anti-CCP, dual-energy X-ray absorptiometry (DEXA) of lumbar spine and hip, and/or digital X-ray radiogrammetry (DXR) of the metacarpal bones. Osteopenia was defined as a z-score < − 1 SD. Pain VAS > 40 mm, was defined as patient unacceptable pain. Multiple logistic regression analyses were performed to assess whether anti-CCP was independently associated with osteopenia or unacceptable pain.ResultsOf the 657 patients, 65% were women, 58% were anti-CCP positive, 37% had osteopenia in the lumbar spine, and 29% had osteopenia in the hip. Sixty-one percent had unacceptable pain at diagnosis. Patients positive for anti-CCP had significantly more frequently osteopenia in the femoral neck and Ward’s triangle compared with anti-CCP-negative patients (p = 0.016 and 0.003, respectively). This difference was found in men at any anti-CCP titer, but in women, osteopenia in these hip locations was found only in those with high anti-CCP titers (> 500 IU/ml). Anti-CCP was not associated with osteopenia in the lumbar spine or the metacarpal bones. In multiple logistic regression analyses, anti-CCP was independently associated with osteopenia in the femoral neck and/or Ward’s triangle but not with unacceptable pain. Instead, inflammatory variables were independently associated with unacceptable pain.ConclusionThese data show that in patients with early RA, anti-CCP positivity was independently associated with osteopenia in the femoral neck and/or Ward, but not in the lumbar spine. In our patients, we could not confirm a recently suggested association between anti-CCP antibodies and pain. Further studies are necessary to explore the possible clinical relevance of interactions between ACPA, bone, and pain found in vitro and in animal models.

Elevated anti-cyclic citrullinated peptide antibody titer is associated with increased risk for interstitial lung disease.

This paper is to examine the relationship between anti-cyclic citrullinated peptide (anti-CCP) antibody titers and the development of interstitial lung disease (ILD) in patients with and without rheumatoid arthritis (RA). A retrospective investigation was conducted on all adult patients tested for anti-CCP between January 1, 2007, and December 31, 2012, in a university healthcare system. Patients with specified exposures or conditions known to cause ILD were excluded. The prevalence of ILD was compared between those with and without a positive CCP. The study population was then divided into four titer groups based on anti-CCP titers: negative, low titer, moderate titer, high titer. Fisher's exact tests compared the prevalence of ILD among the anti-CCP titer groups. Multivariate logistic regression examined the association between anti-CCP and ILD while controlling for confounders. These analyses were repeated in two subgroups: a "confirmed RA" subgroup and an "unconfirmed RA" subgroup. Two thousand and thirty patients met inclusion criteria and 453 of those had confirmed RA. Progressively higher anti-CCP titer groups developed an increasingly higher prevalence of ILD (p < 0.01). When adjusting for age, tobacco, and a diagnosis of RA, higher anti-CCP titer groups continued to correlate with an increased prevalence of ILD (OR 1.47, 95% CI 1.10-1.96, p < 0.001). This study is the first to show that progressively higher anti-CCP titers correlate with increasing prevalence of ILD, even when adjusting for confounders.

Multicenter, observational clinical study of abatacept in Japanese patients with rheumatoid arthritis

The aim of this study was to assess abatacept in rheumatoid arthritis (RA) patient. Patients (20 men, 89 women, aged 61.9 ± 10.4 y) who responded inadequately to conventional synthetic disease-modifying anti-rheumatic drug were treated with abatacept for 24-months. Disease activity score in 28 joints (DAS28-CRP) was evaluated. Of 109 patients, 82 (75.2%) were on methotrexate (MTX; mean dosage 9.0 ± 2.7 mg/week); 48 (44.0%) were naive to biologics and 61 (56.0%) had failed biologics. The 1- and 2-year retention rates were 77% and 53%, respectively. At 24-months, the DAS28-CRP remission rates were 62.8% in the biologic-naïve patients, and 33.3% in the biologic-failure patients (p < .01), while the structural remission rates were 83.9% and 73.1%, respectively (p = .461). Abatacept was equally effective in RA patients who were and were not on concomitant MTX. Biologic-naïve was associated with better clinical outcome. Abatacept was effective in patients who showed decreasing anti-CCP antibody titers or serum MMP-3 levels during treatment. Infection was the most frequent adverse effect of abatacept therapy. In conclusion, abatacept is more effective in biologic-naïve than in biologic-failure RA patients with or without concomitant use of MTX. Abatacept is more effective in RA patients with than without decreasing serum MMP-3 or anti-CCP antibody titers during treatment.

A Study of Correlation of Disease Severity with Antibody Titers in Rheumatoid Arthritis

Introduction: Rheumatoid Arthritis (RA) is one of the most frequent autoimmune diseases in the world which affects about 1% of people. Anti-Cyclic Citrullinated Peptides (Anti-CCP) is shown to be more specific than rheumatoid factor in the diagnosis of RA. This test becomes positive in early stage of disease and it has a high predictive value. Aim: To correlate the relationship between anti-CCP antibody and rheumatoid factor titers and disease activity scores. Materials and Methods: A cross-sectional study was performed in 50 patients with RA for evaluating the relation between anti-CCP antibody titer and Disease Activity Score 28 (DAS28), Simplified Disease Activity Index (SDAI) and Clinical Disease Activity Index (CDAI). A detailed examination of each patient including their demographic characteristics, duration of disease, number of tender and swollen joints, ESR and C-reactive protein, patient’s and physician’s global assessment by VAS (0-10) and titers of rheumatoid factor and nti-CCP antibody. Patients who fulfilled the ACR-EULAR 2010 criteria were included. The statistical analysis was done using Pearson’s correlation coefficient. A p-value of less than 0.05 was considered significant. Results: Of the 50 patients which were included (mean age, 44.82 range, 18-70), 38 were females and 12 were males. Mean ESR was 54±27 mm/hr and Mean CRP was 17.277±23.41 mg/dL. Mean DAS 28 was 5.955±0.962; mean SDAI was 46.9±27.1 and CDAI 28.9±10.8. There was positive correlation (p<0.001) between DAS28 and SDAI (r=0.550) and CDAI (r=0.808). Anti-CCP level was associated with SDAI (r=0.317) and CDAI (r=0.282) (p<0.05). Conclusion: There was significant correlation in the titers of anti-CCP and disease activity indices-SDAI and CDAI. Patients with higher levels of anti-CCP antibody had greater activity.

The Correlation Value of DAS28 with Anti-CCP Titer on Rheumatoid Arthritis Patients in Cipto Mangunkusumo Hospital in 2012-2016

Background: Rheumatoid Arthritis (RA) is one of the diseases associated with the immune system which causes joint damage and effect to the quality of patient’s life. DAS28 CRP value describes RA disease activity. The anti-CCP titer is a very specific examination which provide an overview prognosis of RA patient’s illness. The research on the correlation of anti-CCP Titers with DAS28 CRP values has never been done in Indonesia. Therefore, this research aims to determine the correlation between anti-CCP Titer and DAS28 CRP value in RA patient in Cipto Mangunkusumo hospital with DAS28 CRP value in RSCM.&#x0D; Method: The research design is cross-sectional with the sample amounted to 34. anti-CCP and DAS28 CRP were obtained through patient’s medical records.Result The result of this correlationstudy is (p = 0,582) and r = 0,086.&#x0D; Conclusion: In conclusion, there is no correlation between anti-CCP and DAS28 in Cipto Mangunkusumo hospital.&#x0D; Keywords: Anti-CCP; DAS28 CRP; Rheumatoid Arthritis

Risk factors for progression and prognosis of rheumatoid arthritis-associated interstitial lung disease: single center study with a large sample of Chinese population.

Factors associated with progression and survivals in rheumatoid arthritis-associated interstitial lung disease (RA-ILD) have not been described in a large center China cohort. Seven-hundred and ninety-one consecutive RA patients who completed lung HRCT were considered as potential participants in this retrospective cohort study. Determinants of ILD progression were identified through multivariable logistic analysis. Cox hazards analysis was used to determine significant variables associated with survival. Of 307 patients diagnosed with RA-ILD, 266 were finally included. The 3-year survival rate of RA-ILD patients was 81.24%, and the 5-year survival rate was 69.71%. A total of 82 deaths occurred during follow-up, of which 56 died of respiratory failure due to ILD progression and/or pneumonia while 14 with malignancies (8 with lung cancer). Logistic regression analysis showed that anti-CCP antibody high titer positive (OR: 4.03, 95% CI: 1.04-15.69) and DLCO% < 45% (OR: 8.31, 95% CI: 2.17-31.75) were independent risk factors for the ILD progression. Cox hazards analysis revealed that advanced age (> 60years old) of RA-ILD diagnosis (HR: 2.32, 95% CI: 1.27-4.25) and extensive lung involvement on HRCT (HR: 2.19, 95% CI: 1.24-3.87) were associated with worse survival. Treatment with cyclophosphamide (HR: 0.43, 95% CI: 0.26-0.69) was associated with better survival. In RA-ILD patients, anti-CCP antibody high titer positive and DLCO% < 45% are risk factors for ILD progression. Advanced age and extensive lung involvement on HRCT, rather than the baseline UIP pattern, independently predict mortality after controlling for potentially influential variables. Furthermore, cyclophosphamide treatment helps to improve the prognosis in real-world experience.

Image analysis of fibrosis in labial salivary glands of patients with systemic autoimmune diseases. Close correlation of lobular fibrosis to seropositive rheumatoid arthritis and increased anti-CCP and RF titres in the serum

Lobular fibrosis in labial salivary glands of patients with systemic autoimmune disease is a rarely examined and rather neglected histological change. Its significance and disease association is poorly understood. Our aim was to explore the clinical correlations of fibrosis in labial salivary gland samples using objective methods and laboratory parameters. Labial salivary gland samples from more than 300 patients over a 3-year period were selected from the archives of the pathology department, histologically examined, digitised, image analysed and statistically evaluated to identify the presence and intensity of lobular fibrosis, its relation to age, clinical diagnoses of systemic autoimmune disease and the presence of rheumatoid factor (RF), anti-cyclic citrullinated peptide (CCP), antinuclear antibodies (ANAs), and anti-dsDNA serum markers. Significant correlationwas found between lobular fibrosis and the presence of autoimmune disease (p= 0.023), mainly seropositive rheumatoid arthritis (p < 0.001). Also significant association was found between the fibrosis and the presence of serum anti-CCP (p < 0.001) and IgA/IgG/IgM-RF (p < 0.001, p < 0.001 and p= 0.008, respectively). Significant association was explored between the anti-dsDNA positivity and the negative histology groups (p= 0.033) and between the ANA positivity and the inflammation only group (p= 0.021). The results suggest that lobular fibrosis tends to associate to certain systemic autoimmune diseases, mainly seropositive rheumatoid arthritis, and seems to be rare in labial salivary gland biopsiesof autoimmune diseases characterised by presence of anti-dsDNA. The close correlation of ANA positivity and the inflammation only histology was not surprising, since the majority of patients (62%) have Sjögren's syndrome, known for its inflammatory infiltrate. These findings emphasise that evaluation of lobular fibrosis and inflammation in histological samples of labial salivary gland biopsiesare equally important.

Selective inhibition of Tfh cells by a small molecule inhibitor abrogates progression of experimental inflammatory arthritis

Abstract Background Rheumatoidarthritis (RA) is an inflammatory autoimmune disease characterized by T cell infiltration in the joints and autoantibody production. T follicular helper (Tfh) cells are a unique subset of CD4+ T cells regulating antibody production in B cell follicle. Our previous studies have showed that increased circulating Tfh cells were correlated with anti-CCP antibody titer and disease activity in active RA patients, indicating that Tfh cells may play an important role in RA pathogenesis. Here we investigate the therapeutic potential of a small molecule inhibitor targeting Tfh cells (SMI-Tfh) in mice with collagen-induced arthritis (CIA). Methods CIA was induced in DBA/1 mice by immunization with chicken type II collagen. Following the onset of clinical arthritis, mice were treated with SMI-Tfh (50mg/kg/day) for 10 days. Arthritis progression was monitored daily and recorded by the paw swollenness. Blood, spleen, and affected paws were collected at the end of the study. Tfh cells were examined and defined by CD4+CXCR5+ICOS+via flow cytometry and further confirmed by immunohistochemistry staining in spleen. Results Mice developed arthritis four weeks after immunization with type II collagen. Treatment with SMI-Tfh significantly reduced the disease progression/activity in mice with CIA. SMI-Tfh significantly inhibited the frequency of Tfh cells in spleen (P&amp;lt;0.01), but not the frequency of circulating Tfh cells in CIA mice (P&amp;gt;0.05). Conclusion The small molecule inhibitor SMI-Tfh selectively inhibits Tfh cells and abrogates progression/activity of inflammatory arthritis in CIA mouse model. Treatment with SMI-Tfh in CIA mice provides a potential strategy for joint protection and may be beneficial in RA patients.

Clinical Significance of Periodontitis in Rheumatoid Arthritis Patients: Association with Disease Activity and Functional Status

Objectives: To evaluate frequency of periodontitis (PD) in rheumatoid arthritis (RA) patients and relate it with clinical characteristics, disease activity, functional status, anti-cyclic citrullinated peptide (anti-CCP) and radiographic scores.Methods: The study included 60 RA patients and 30 controls. Clinical Disease activity index (CDAI), Modified Health Assessment Questionnaire (MHAQ), visual analogue scale of pain and Scott's modification to Larsen scoring method were assessed. Rheumatoid factor (RF) positivity and anti-CCP titer were measured. Periodontal examination was performed and relevant indices calculated.Results: The mean age of the patients was 49.1 ± 13 years and they were 52 females and 8 males. PD was present in 71.7% of RA patients versus 46.7% in control (p=0.02). PD was predominantly generalized (p=0.004) with moderate-severe degree (p=0.01). Age (p=0.007), disease duration (p<0.0001), morning stiffness (p=0.01), CDAI (p<0.0001), MHAQ (p=0.02), CRP (p=0.02), anti-CCP titer (p=0.01) and methotrexate treatment (p=0.005) were significantly higher in RA-PD versus RA. However, gender, smoking, oral hygiene, erythrocyte sedimentation rate, RF, anti-CCP positivity and radiographic scoring were insignificantly different. PD positivity was 96.3%, predominant generalized in 92.6%, moderate (40.7%) and severe degree (37%) in early RA versus (51.5%, 24.2%, 24.2%, 12.1% respectively) in late RA patients. All PD indices were higher in early patients (p ≤ 0.05) while teeth loss (p=0.03) was higher in late cases. CDAI, VAS and ACPA titer all significantly correlated with PD indices (p<0.05).Conclusion: Periodontitis is frequent in RA patients’ especially in early cases and is remarkably associated to disease activity and reduced functional status.

Periodontal pathogens and the association between periodontitis and rheumatoid arthritis in Korean adults.

PurposePeriodontitis and rheumatoid arthritis (RA) share a similar inflammatory pathogenesis. Porphyromonas gingivalis (Pg) can induce anticyclic-citrullinated peptide autoantibodies (anti-CCP antibodies), a key factor in the development of RA. This study aimed at evaluating the relationships between the 2 diseases and identifying the clinical implications thereof, with a focus on periodontal pathogens in Korean adults.MethodsA total of 260 RA patients and 86 age- and sex-matched control patients without arthritis were enrolled in this prospective cross-sectional study. Periodontal indices and the prevalence and amount of periodontal pathogens were compared between the groups. Correlations between periodontal and RA indices were examined, as were correlations between 9 periodontal pathogens and RA indices.ResultsThe RA group had significantly higher values than the control group for all investigated periodontal indices (P<0.05) except the number of teeth. The gingival index (GI) was correlated with the disease activity score 28 (DAS28) (r=0.125, P=0.049), RA disease duration (r=0.253, P<0.001), erythrocyte sedimentation rate (ESR) (r=0.162, P=0.010), and anti-CCP antibody titer (r=0.205, P=0.004). Probing pocket depth (PPD) was correlated with ESR (r=0.139, P=0.027) and anti-Pg antibody titer (r=0.203, P=0.001). Bleeding on probing (BOP) was correlated with DAS28 (r=0.137, P=0.030), RA disease duration (r=0.202, P=0.001), ESR (r=0.136, P=0.030), anti-Pg antibody titer (r=0.177, P=0.005), and anti-CCP antibody titer (r=0.188, P=0.007). Clinical attachment level (CAL) and periodontitis severity were correlated with anti-Pg antibody titer (the former r=0.201, P=0.002; the latter r=0.175, P=0.006). The quantity of Pg was positively correlated with the serum anti-Pg antibody titer (r=0.148, P=0.020).ConclusionsThe GI, BOP, and PPD showed positive relationships with several RA indices. The anti-Pg antibody titer had positive relationships with PPD, BOP, CAL, and periodontitis severity. Thus, increasing values of periodontal indices could be used as a risk indicator of disease development in RA patients, and an increasing anti-Pg antibody titer could be considered as a warning sign in RA patients suffering with periodontitis.

Prevalence of Pulmonary Manifestations in a Cohort of the Egyptian Patients with Rheumatoid Arthritis

Background: rheumatoid arthritis can affect the lung in many ways including lung parenchymal affection (Interstitial lung disease), pleural inflammation, upper and lower airways affection and pulmonary vasculature. Aim of the work: this study aimed toestimate the prevalence of pulmonary manifestations in Egyptian RA patients. Patients and methods: this study included seventy patients with RA. All patients were subjected to detailed medical history taking, general examination including chest examination, local musculoskeletal examination, laboratory investigations including CBC, ESR, CRP titre, ALT, AST, BUN and creatinine, rheumatoid factor titer (RF), Anti-CCP antibodies titer, radiological investigations including chest X ray, HRCT and PFT. Results: pulmonary manifestations were prevalent in 50% of patients. Spirometric abnormalities were detected in 45.7%, while HRCT abnormalities were detected in 42.85%. HRCT severity score was correlated with age, tender joint count (TJC), swollen joint count (SJC) and ESR. There was a statistically significant negative correlation between HRCT and FVC, FEV1. There was no correlation regarding other parameters. Conclusion: pulmonary affection was prevalent in RA and can be detected by radiological and pulmonary functions. There was correlation with age, ESR and pulmonary functions

High titers of both rheumatoid factor and anti-CCP antibodies at baseline in patients with rheumatoid arthritis are associated with increased circulating baseline TNF level, low drug levels, and reduced clinical responses: a post hoc analysis of the RISING study

BackgroundAlthough both rheumatoid factor (RF) and anticyclic citrullinated peptide antibodies (anti-CCP) are useful for diagnosing rheumatoid arthritis (RA), the impact of these autoantibodies on the efficacy of tumor necrosis factor (TNF) inhibitors has been controversial. The aim of this post hoc analysis of a randomized double-blind study (the RISING study) was to investigate the influences of RF and anti-CCP on the clinical response to infliximab in patients with RA.MethodsMethotrexate-refractory patients with RA received 3 mg/kg of infliximab from weeks 0 to 6 and then 3, 6, or 10 mg/kg every 8 weeks from weeks 14 to 46. In this post hoc analysis, patients were stratified into three classes on the basis of baseline RF/anti-CCP titers: “low/low-C” (RF < 55 IU/ml, anti-CCP < 42 U/ml), “high/high-C” (RF ≥ 160 IU/ml, anti-CCP ≥ 100 U/ml), and “middle-C” (neither low/low-C nor high/high-C). Baseline plasma TNF level, serum infliximab level, and disease activity were compared between the three classes.ResultsBaseline RF and anti-CCP titers showed significant correlations with baseline TNF and infliximab levels in weeks 2–14. Comparison of the three classes showed that baseline TNF level was lowest in the low/low-C group and highest in the high/high-C group (median 0.73 versus 1.15 pg/ml), that infliximab levels at week 14 were highest in the low/low-C group and lowest in the high/high-C group (median 1.0 versus 0.1 μg/ml), and that Disease Activity Score in 28 joints based on C-reactive protein at week 14 was lowest in the low/low-C group and highest in the high/high-C group (median 3.17 versus 3.82). A similar correlation was observed at week 54 in the 3 mg/kg dosing group, but not in the 6 or 10 mg/kg group. Significant decreases in both RF and anti-CCP were observed during infliximab treatment.ConclusionsRF/anti-CCP titers correlated with TNF level. This might explain the association of RF/anti-CCP with infliximab level and clinical response in patients with RA. Baseline RF/anti-CCP titers may serve as indices that aid infliximab treatment.Trial registrationClinicalTrials.gov, NCT00691028. Retrospectively registered on 3 June 2008.

Prevalence and characteristics of eye involvement in patients with rheumatoid arthritis

Background and objective: Rheumatoid arthritis is a systemic inflammatory disease. Ocular manifestations involved with rheumatoid arthritis are keratoconjunctivitis sicca, episcleritis, scleritis, anterior and posterior uveitis, dry eyes and ulcerative keratitis. This study aimed to detect the prevalence of ocular manifestations in rheumatoid arthritis patients, find out the relation between the effects of disease modifying anti-rheumatic drugs, biological agents and ocular complications in rheumatoid arthritis patients and explore role of anti-cyclic citrullinated peptide antibodies. Methods: This is a cross-sectional clinical study of 60 rheumatoid arthritis patients who have attended Rizgary Teaching Hospital in Erbil. A data information about symptoms of ocular manifestations and history of ocular complications before starting disease modifying anti-rheumatic drugs and/or biological agents were taken. Musculoskeletal examination, serum Anti-CCP antibodies test were done. Ocular examination by ophthalmologist was done. Results: This study was conducted from April to November 2015 and involved 60 patients; 55 females and five males with a mean± SD age of 46 ± 11.46 years. Thirty nine (65%) patients had ocular manifestations of rheumatoid arthritis. The most frequent manifestation was dry eyes 30 (50.0%). There was no relation between severity of the rheumatoid arthritis disease and ocular manifestation (P = 0.529). There was a relationship between the Anti-CCP antibodies titer and presence of ocular manifestations in rheumatoid arthritis patients (P = 0.006). There were no curable effects of the disease modifying anti-rheumatic drugs, biological agents on ocular manifestations in rheumatoid arthritis patients (P = 0.787). Conclusion: Dry eye was the most common ocular manifestation, anti-CCP antibodies are a sensitive marker for ocular manifestations. Disease modifying anti-rheumatic drugs and biological therapies provide no significant efficacy in treatment or prevent the occurrence of ocular manifestations in rheumatoid arthritis patients.

High titer of anti-citrullinated peptide antibody is a risk factor for severe carotid atherosclerotic plaque in patients with rheumatoid arthritis: the TOMORROW study.

Cardiovascular disease is one of the complications of rheumatoid arthritis (RA). We researched the morbidity and severity of existing carotid atherosclerosis plaque and associated risk factors in patients with RA. This study included 413 participants, including 208 patients with RA and 205 age- and sex-matched healthy volunteers. Carotid ultrasound, clinical data collection and assessment of cardiovascular risk factors were performed. Atherosclerotic plaque was defined as an intima-media thickness ≥ 1.1 mm. Severity of plaque was assessed by plaque score, defined as the sum of the maximal thickness of all plaques in bilateral carotid arteries. Data were analyzed from 200 patients with RA and 202 controls. Carotid plaque was observed more frequently in patients with RA than controls (47.0 vs. 36.1%, P = 0.027). Moreover, plaque score was significantly higher in RA patients (P = 0.032). In logistic regression analysis, RA represented an independent risk factor for the presence of plaque (adjusted odds ratio, 1.68; 95% confidence interval, 1.03-2.74). Comparing RA patients with and without plaque, anti-cyclic citrullinated peptide (anti-CCP) antibodies titer was significantly higher in patients with plaque (315.8 ± 454.1 U/mL) than in patients without (165.7 ± 281.1 U/mL; P = 0.005). Moreover, multiple linear regression analysis clarified that anti-CCP antibody titer was associated with plaque score in patients with RA. High prevalence of any carotid plaques and severe carotid plaques were more frequent in patients with RA. High titer of anti-CCP antibodies represented a risk factor for severe carotid atherosclerotic plaque in patients with RA.

A large chronic pericardial effusion in an ultramarathon runner with anti-CCP positive rheumatoid arthritis

Pericardial effusions arise as an extra-articular manifestation of rheumatoid arthritis (RA). Pericardial effusions are often asymptomatic, particularly in the early phase, but patients are at risk of cardiac tamponade as...

Left ventricular function at two-year follow-up in treatment-naive rheumatoid arthritis patients is associated with anti-cyclic citrullinated peptide antibody status: a cohort study

Objectives: In rheumatoid arthritis (RA), the role of autoimmunity, especially anti-cyclic citrullinated peptide antibody (anti-CCP) level, and the time-course of left ventricular (LV) function is unknown. The objective was to assess LV function and the amount of coronary calcium in relation to anti-CCP levels in a cohort of treatment-naive RA patients, and to assess changes in these parameters during a 2 year follow-up period.Method: Sixty-six steroid- and disease-modifying anti-rheumatic drug-naive RA patients were treated with methotrexate according to the Danish national guidelines. We assessed LV function by conventional echocardiography and speckle-tracking echocardiography. We estimated the amount and progression of coronary calcium by coronary computed tomography. Patients were examined at the time of diagnosis and after 2 years.Results: Patients with elevated anti-CCP at baseline and after 2 years, compared to those with non-persistently elevated anti-CCP, had significantly less improvement in S´ (1 ± 1.4 cm/s vs 0.2 ± 0.9 cm/s; p = 0.04) and a worsening in global longitudinal systolic strain (GLS) (0.6 ± 1.8% vs −1 ± 2.8%; p = 0.04). There was a significant correlation between ΔGLS over 2 years and anti-CCP at 2 year follow-up (r = 0.36; p = 0.006). We observed a small progression of coronary calcium score during the 2 year follow-up period. No differences in progression were found between patients with high anti-CCP titres at baseline and 2 year follow-up (n = 12) and patients with normal/low anti-CCP titres (n = 32) (23.8 ± 40.3 vs 22.6 ± 68.9; p = 0.96).Conclusions: Deformation analysis by speckle-tracking echocardiography is a valuable tool to detect early development of myocardial dysfunction despite normal ejection fraction in RA.

Factors accounting for HIV antibody test false positive results in patients with rheumatoid arthritis

Objective To investigate if immunological factors associated with the false HIV screening test results in RA. Methods Subjects who attended the Rheumatology Outpatient Clinic-Internal Medicine Unit of Guanghua Integrative Hospital, from October 2013 to October 2014, who met the American College of Rheumatology/European League Against Rheumatism Criteria for RA were recruited for the study. 100 subjects with RA were recruited. Each patient underwent clinical examination and blood sampling for assessment of serum HIV screening test and Rheumatoid factors (RF-IgA, -IgG, -IgM) and anti-cyclic citrullinated protein antibodies (anti-CCP) were purified from the plasma and detected by ELISA, Samples were collected and processed using standard protocols and were stored in the same freezer before analysis. RA patients were divided into two groups based on the titters of RF and anti-CCP: RF 300 U/ml / anti-CCP>500 U/ml group.HIV screening tests were determined by three methods: ELISA、Immuno-colloidal Golden Method and ECLIA.The positive results were confirmed by the Changning Centers for Disease Control, Shanghai through western-blotting test. Results 100 samples detected by ELISA and Immuno-colloidal Golden Method were given negative results, 16 positive results existed in ECLIA group. There were1, 12, 3 positive cases in RF-IgM 300 U/ml group(2.7%, 32.4%, 13.6%; P 500 RU/ml groups there were 2 and 4 positive results(4.7%, 24.6%; P<0.01). Conclusions Different HIV screening test methods would give different results, according to operation requirement using second method to determine the HIV screening result. HIV False-positivity was associated with the titers of anti-CCP and RF in RA.(Chin J Lab Med, 2016, 39: 522-525) Key words: Arthritis, rheumatoid; Human immunodeficiency virus; False positive reactions; Autoantibodies; Enzyme-linked immunosorbent assay

Anticyclic citrullinated peptide antibody in rheumatoid arthritis:a cross-sectional study in Iran.

Studies have shown that anticyclic citrullinated peptide antibody (anti-CCP) titers can be useful in the diagnosis of rheumatoid arthritis (RA). We evaluate the association between anti-CCP antibody titers and the demographic, clinical, and laboratory characteristics of RA patients. Moreover, we explore whether there is any relation between joint destruction and demographic and clinical characteristics of RA patients. One hundred and four RA patients with positive anti-CCP titers were compared to 104 RA patients with negative anti-CCP titers. The activity of RA was evaluated using the Disease Activity Score 28 (DAS28). Joint destruction was assessed in the subjects by X-rays of the wrists. Blood samples were collected for assessment of anti-CCP, rheumatoid factor (RF), and erythrocyte sedimentation rate. Forty-eight (23.0%) males and 160 (76.9%) females were included in this study. RF, DAS28, and joint destruction were significantly different between patients with and without anti-CCP (P < 0.0001). DAS28, duration of disease, hospitalizations, and occupation differed significantly between patients with and without joint destruction (P < 0.0001). This study indicates that anti-CCP is correlated with a high disease activity index and more joint destruction in RA patients and it may be used as a prognostic factor for RA.

Performance of the 2010 American College of Rheumatology/European League against Rheumatism (ACR/EULAR) criteria for classification of rheumatoid arthritis in an Indian population: An observational study in a single centre.

Background & objectives:The 1987 American College of Rheumatology (ACR) criteria were criticised for classifying patients only in the late stage. The 2010 ACR/European League against Rheumatism (ACR/EULAR) classification criteria for rheumatoid arthritis (RA) were thus formulated to recognize the early stage of disease with high sensitivity. This pilot study was designed to estimate and compare the sensitivities of the 1987 ACR and 2010 ACR/EULAR classification criteria for RA.Methods:In a tertiary care hospital, the medical records of 97 patients diagnosed with RA were reviewed. Case study forms were filled with relevant clinical data and investigation results after reviewing each medical record. The radiographs of hands were also reviewed. To each case, both the 1987 ACR and the 2010 ACR/EULAR criteria were applied and the results of the classification were noted.Results:The sensitivity of the 2010 ACR/EULAR criteria was found to be 79.38 per cent [95% confidence interval (CI) = 71.33-87.43%] and the sensitivity of the 1987 ACR criteria was found to be 63.92 per cent (95% CI = 54.36-73.48%). The difference in the sensitivities was significant (P< 0.01). There was a significant rise in sensitivity of the 2010 ACR/EULAR criteria when patients having anti-cyclic citrullinated peptide (CCP) titres were analysed.Interpretation & conclusions:The 2010 ACR/EULAR criteria were found to be more sensitive than the 1987 ACR criteria possibly owing to features of the criteria. Anti-CCP titres were found to increase the sensitivity of the 2010 ACR/EULAR criteria.

Association between anti-Porphyromonas gingivalis or anti-α-enolase antibody and severity of periodontitis or rheumatoid arthritis (RA) disease activity in RA.

BackgroundPeriodontitis (PD) has been reported to be associated with rheumatoid arthritis (RA). Porphyromonas gingivalis (P. gingivalis) is a gram-negative anaerobic bacterium that is recognized as one of the major pathogenic organisms in PD and is the only bacterium known to express peptidylarginine deiminase (PAD). Antibody against human α-enolase (ENO1) is one of the autoantibodies in RA. ENO1 is a highly conserved protein, and could be a candidate molecule for molecular mimicry between bacterial and human proteins. In the present study, we measured serum antibody against P. gingivalis and human ENO1 in patients with RA and investigated their association with the severity of PD or disease activity of RA.MethodsTwo hundred, forty-eight patients with RA and 85 age- and sex-matched healthy controls were evaluated by rheumatologic and periodontal examinations. The serum levels of anti-P. gingivalis and anti-ENO1 antibodies were measured by an enzyme-linked immunosorbent assay (ELISA).ResultsPatients with RA had significantly higher levels of anti-P. gingivalis and anti-ENO1 antibody titers than the controls (p = 0.002 and 0.0001, respectively). Anti-P. gingivalis antibody titers significantly correlated with anti-ENO1 antibody titers in RA patients (r = 0.30, p < 0.0001). There were significant correlations between anti-P. gingivalis antibody titers and the gingival index (GI), probing pocket depth (PPD), bleeding on probing (BOP) and clinical attachment level (CAL) (p = 0.038, 0.004, 0.004 and 0.002, respectively) in RA. Anti-P. gingivalis antibody titers were not correlated with disease activity score 28 (DAS28) or anti-CCP titer. However, anti-ENO1 antibody titers were significantly correlated not only with the periodontal indices, such as PPD, BOP, and CAL (p = 0.013, 0.023 and 0.017, respectively), but also RA clinical characteristics, such as DAS28, anti-CCP titer, and ESR (p = 0.009, 0.015 and 0.001, respectively).ConclusionAnti-P. gingivalis and anti-ENO1 antibody titers were correlated with the severity of PD in RA. Anti-ENO1 antibody titers, but not anti-P. gingivalis antibody titers, were further associated with RA disease activity.Electronic supplementary materialThe online version of this article (doi:10.1186/s12891-015-0647-6) contains supplementary material, which is available to authorized users.