Omicron variant dominance and anti-SARS-CoV-2 vaccination are key determinants for a milder course of COVID-19 in patients with systemic autoimmune rheumatic diseases

INTRODUCTION

This study aimed to determine whether the introduction of anti-SARS-CoV-2 vaccines and the dominance of the omicron variant had a significant impact on the outcome of COVID-19 in patients with systemic autoimmune rheumatic diseases (SAIRDs).

METHODS

Using data entered to the Greek Rheumatology Society COVID-19 registry, we investigated the incidence of hospitalization and death due to COVID-19, during the successive periods of the pandemic according to the prevalent strain (wild-type, Alpha, Delta, Omicron) in vaccinated and unvaccinated patients. Variables independently associated with hospitalization and death were explored using multivariate regression analyses, while Kaplan-Meier curves were used to depict survival data.

RESULTS

From August 2020 until June 30, 2022, 456 cases (70.2% females) of COVID-19 with a mean age (± SD) of 51.4 ± 14.0 years were reported. In unvaccinated patients, the proportions of hospitalization and death were 24.5% and 4%, compared to 12.5% and 0.8% in the vaccinated group (p < 0.001 for both comparisons). The rates of hospitalization for the wild-type, Alpha, Delta, and Omicron periods were 24.7%, 31.3%, 25.9%, and 8.1% respectively (p < 0.0001), while the case fatality rates were 2.7%, 4%, 7%, and 0%, respectively (p = 0.001). Using multivariable regression analysis, factors independently associated with hospitalization were infection by a non-Omicron variant, being non-vaccinated, exposure to rituximab, older age, and respiratory and cardiovascular disease. Independent predictors for death were contracting COVID-19 during the Alpha or Delta period, pulmonary disease, and older age, while being vaccinated was protective.

CONCLUSIONS

In this 2-year analysis, the rates of hospitalization and death among patients with SAIRDs have declined significantly. Vaccination and the dominance of the Omicron variant appear to be the major determinants for this shift. Key points • During the late phase of the pandemic, the proportion of severe COVID-19 cases, defined as requiring hospitalization or resulting in death, in patients with systemic autoimmune rheumatic diseases has declined. • Anti-SARS-CoV-2 vaccination and the dominance of the Omicron strain are the key factors that have independently contributed to this shift.

Impact of biologic therapies on risk of adverse cardiovascular events in patients with Ankylosing Spondylitis or Psoriatic Arthritis: A systematic literature review

BACKGROUND

Recent evidence highlights increased mortality and morbidity due to cardiovascular disease (CVD), especially within the two major forms of Spondyloarthropathies (SpAs), Ankylosing Spondylitis (AS) and Psoriatic Arthritis (PsA). Healthcare professionals and patients in these populations should be alerted regarding the high risk of cardiovascular (CV) events and thus, customize the treatment strategy accordingly.

OBJECTIVE

This systematic literature review aimed to determine the effects of biological therapies on serious CV events in AS and PsA.

METHODS

Screening for the study was carried out using PubMed and Scopus databases from the database's inception to the 17th of July 2021. The literature search strategy for this review is based on the Population, Intervention, Comparator, Outcomes (PICOs) framework. Randomized controlled trials (RCTs) of biologic therapies for the treatment of AS and/or PsA were included. The primary outcome measure was the number of serious CV events reported during the placebo-controlled phase.

RESULTS

4,422 articles were generated from keywords, eligibility criteria, and databases. Following the screening, we retained 13 studies for analysis: 3 in AS and 10 in PsA. Meta-analysis of results was not feasible due to the small number of the identified studies, the heterogeneity of the biologic treatment and the included populations, as well as the infrequently reported requested endpoint. According to our review, biologic treatments are safe options as for CV risk in patients with PsA or AS.

CONCLUSION

Further and more extensive trials in AS/PsA patients at high risk of CV events are needed before firm conclusions can be drawn.

Chilblains After SARS-CoV-2 Vaccination: Coincidence or Real Association?

We read with great interest the article of Meara et al¹ in your journal describing a case of chilblain-like lesions after vaccination against SARS-CoV-2. Since the start of the coronavirus disease 2019 (COVID-19) pandemic, millions of vaccine doses have been administered and their safety has been generally confirmed.

SLICC-Frailty Index is independently associated with impaired physical function, activities of daily living, and quality of life measures

OBJECTIVE

The Systemic Lupus International Collaborating Clinics Frailty Index (SLICC-FI) was developed to assess health deficits including disease activity, organ damage, comorbidities and functional status. We examined any relationship between SLICC-FI and objective physical function measures, activities of daily living (ADL) performance, and quality of life in Systemic Lupus Erythematosus (SLE).

METHODS

SLICC-FI was estimated using data from patient files and patient-reported questionnaires. Jamar Dynamometer, pinch gauge and Purdue pegboard test measured grip strength, pinch strength and dexterity, respectively. ADL performance was assessed by the Disabilities of Arm, Shoulder and Hand (DASH) questionnaire, and Health Assessment Questionnaire (HAQ). Quality of life was evaluated by LupusQol questionnaire.

RESULTS

This cross-sectional study included 240 SLE patients (90% female, mean (SD) age: 47.63 (13.01), median (IQR) disease duration: 9 (4-16). Mean (SD) SLICC-FI was 0.09 (0.06). Forty-three (17.9%) patients were classified as robust, 105 (43.8%) as relatively less fit, 77 (32.1%) as least fit, and 15 (6.2%) as frail. In univariate analysis, SLICC-FI was significantly associated with DASH and HAQ with an inverse association with grip strength, pinch strength, and all purdue scores (all p < 0.001). A negative correlation was found between SLICC-FI score and all LupusQoL domain scores (all p < 0.001). All associations remained statistically significant in multivariate regression analysis, after adjustment for age, disease duration, SLEDAI-2K, SLICC, immunosuppressives, corticosteroids and Charlson score.

CONCLUSION

SLICC-FI is independently associated with poor physical function and ADL performance and impaired quality of life and may help to identify patients in need for additional interventions beyond routine care.

Effectiveness and Safety of Certolizumab Pegol in Axial Spondyloarthritis in a Real-World Setting in Greece: A Sub-Analysis of the Prospective Non-Interventional CIMAX Cohort Study

Objectives:

We report the effectiveness and safety of certolizumab pegol (CZP) treatment in a real-world Greek axial spondyloarthritis (axSpA) population, including patients with radiographic (r-axSpA) and non-radiographic (nr-axSpA) disease.

Methods:

We performed a sub-analysis of the Greek cohort from CIMAX (NCT02354105), a multicentre, non-interventional cohort study that prospectively investigated CZP treatment in patients with axSpA. The primary outcome was change from baseline (CfB) in Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) to Week 52.

Results:

Across 12 sites in Greece, 126 patients (r-axSpA: 91; nr-axSpA: 35) received ≥1 dose of CZP and were included in the Safety Set (SS), with 120 patients (r-axSpA: 86; nr-axSpA: 34) included in the Full Analysis Set (FAS). The mean (standard deviation [SD]) CfB in BASDAI at Week 52 was −3.8 (2.0) in the overall axSpA population, with numerically greater improvements observed for nr-axSpA patients compared with r-axSpA (nr-axSpA: −4.2 [2.1]; r-axSpA: −3.7 [2.0]). Improvements in the axSpA population, including r-axSpA and nr-axSpA subpopulations, were observed in key secondary and additional outcomes at Week 52. Overall, 14.3% (18/126) of patients in the axSpA population experienced ≥1 adverse event (AE). There were no serious AEs or deaths reported during the study.

Conclusions:

Patients with r-axSpA and nr-axSpA treated with CZP in clinical practice in Greece showed improvements in disease activity and key symptoms. CZP treatment may therefore help address the substantial health burden associated with axSpA in Greece.

Better outcomes of COVID-19 in vaccinated compared to unvaccinated patients with systemic rheumatic diseases

OBJECTIVE

Τo report outcomes of breakthrough COVID-19 in comparison with COVID-19 in unvaccinated patients with systemic rheumatic diseases (SRDs).

METHODS

Patients with SRD with COVID-19 (vaccinated and unvaccinated) were included by their rheumatologists in a registry operated by the Greek Rheumatology Society in a voluntarily basis. Type, date and doses of SARS-CoV-2 vaccines were recorded, and demographics, type of SRD, concurrent treatment, comorbidities and COVID-19 outcomes (hospitalisation, need for oxygen supplementation and death) were compared between vaccinated and unvaccinated patients.

RESULTS

Between 1 March 2020 and 31 August 2021, 195 patients with SRD with COVID-19 were included; 147 unvaccinated and 48 vaccinated with at least one dose of a SARS-CoV-2 vaccine (Pfizer n=38 or AstraZeneca n=10). Among vaccinated patients, 29 developed breakthrough COVID-19 >14 days after the second vaccine dose (fully vaccinated), while 19 between the first and <14 days after the second vaccine dose (partially vaccinated). Despite no differences in demographics, SRD type, treatment or comorbidities between unvaccinated and vaccinated patients, hospitalisation and mortality rates were higher in unvaccinated (29.3% and 4.1%, respectively) compared with partially vaccinated (21% and 0%) or fully vaccinated (10.3% and 0%) patients.

CONCLUSIONS

Vaccinated patients with SRD with breakthrough COVID-19 have better outcomes compared with unvaccinated counterparts with similar disease/treatment characteristics.

COVID-19 vaccine safety and nocebo-prone associated hesitancy in patients with systemic rheumatic diseases: a cross-sectional study

Objective

To describe the rate and type of adverse effects (AEs) and the frequency of disease flares after COVID-19 vaccination and to assess the reasons for vaccination hesitancy (non-vaccination) in SRD patients.

Methods

Telephone interviews were conducted of SRD patients consecutively enrolled (15/06/2021–1/7/2021). Participants were asked about the type of AEs and disease flare after vaccination. Reasons for vaccination hesitancy were recorded. Univariate and mutivariable analyses examined associations of demographic, clinical and other features, with occurrence of AEs, disease flare and non-vaccination. For the latter, association with negative vaccination behaviour (not influenza vaccinated for the last 2 years) and nocebo-prone behaviour (denoting AEs attributed to negative expectations [Q-No questionnaire]) was also tested.

Results

561 out of 580 contacted patients were included in the study. 441/561 (78.6%) patients were vaccinated [90% (Pfizer, Moderna), 10% (Astra-Zeneca)]. AEs were reported by 148/441 (33.6%), with rates being comparable between the three vaccines. AEs were more common in females and those with chronic obstructive pulmonary disease [OR, 95% CI; females: 2.23 (1.30–3.83); COPD: 3.31 (1.24–8.83)]. Disease flare was reported in 9/441 (2%) patients. For those unvaccinated, fear that the vaccine would be harmful (53.3%), could cause disease flare (24.2%) and/or could cause thrombosis (21.7%) were the main reasons to do so. Multivariable analysis identified as independent variables for non-vaccination: nocebo-prone behaviour (OR; 95% CI, 3.88; 1.76–8.55), negative vaccination behaviour (6.56; 3.21–13.42) and previous COVID-19 infection (2.83; 1.13–7.05). Higher educational status was protective (0.49; 0.26–0.92).

Conclusion

No new safety signals for COVID-19 vaccination were observed. Vaccination campaign should target SRD patients with nocebo-prone and negative influenza vaccination behaviour.

Introduction and switching of biologic agents are associated with antidepressant and anxiolytic medication use: data on 42 815 real-world patients with inflammatory rheumatic disease

OBJECTIVES

Depression and anxiety are linked bi-directionally with inflammatory rheumatic diseases (IRDs) activity, which in turn, depends on subjective patient reported outcomes that can be distorted by comorbid mood disorders. We tested the hypothesis that introduction and/or switching of biologic agents for IRDs are associated with treatment for depression and/or anxiety, by analysing real-world data.

METHODS

Using a country-wide electronic prescription database (10 012 604 registered, 99% population coverage), we captured almost all patients with rheumatoid arthritis (n=12 002), psoriatic arthritis (n=5465) and ankylosing spondylitis (n=6423) who received biologic disease modifying anti-rheumatic drugs (bDMARDs) during a 2-year period (8/2016-7/2018). Concomitant antidepressant/anxiolytic medication use was documented in patients who started or switched bDMARDs and compared with those who remained on conventional synthetic (cs)DMARDs or the same bDMARD, respectively, by multivariate regression analysis.

RESULTS

Two-year data analysis on 42 815 patients revealed that bDMARD introduction was associated with both antidepressant [OR: 1.248, 95% CI 1.153 to 1.350, p<0.0001] and anxiolytic medication use [OR: 1.178, 95% CI 1.099 to 1.263, p<0.0001]. Moreover, bDMARD switching was also associated with antidepressant [OR: 1.502, 95% CI 1.370 to 1.646, p<0.0001] and anxiolytic medication use [OR: 1.161, 95% CI 1.067 to 1.264, p=0.001]. Notably, all these associations were independent of age, gender, underlying disease diagnosis and concomitant glucocorticoid or csDMARD medication use.

CONCLUSION

In real-world settings, both introduction and switching of bDMARDs in patients with IRDs were associated with the presence of mood disorders. Although a causal relationship is uncertain, the impact of depression and anxiety should always be considered by physicians facing the decision to introduce or switch bDMARDs in patients with active IRDs.

Nocebo-Prone Behaviour in Patients with Autoimmune Rheumatic Diseases during the COVID-19 Pandemic

BACKGROUND

The COVID-19 pandemic is associated with emotional distress and significant disruptions in health-care services. These are key players in the development of nocebo phenomena. We aimed to investigate nocebo-prone behaviour in patients with autoimmune rheumatic diseases (ARD) amid the COVID-19 pandemic-associated lockdown.

METHODS

Consecutive patients were telephone-interviewed during the COVID-19 pandemic in Greece. Clinical and socioeconomic characteristics (eg, level of education) were recorded. For nocebo behaviour, a four-item validated questionnaire (Q-No, cut-off score>15), was used. Results were compared with pre-COVID-19 Q-No scores collected from patients followed-up in our department.

RESULTS

Nocebo behaviour was detected in 51/500 (10.2%) individuals. In patients with nocebo behaviour, use of anti-hypertensives was less common (17.6% vs 31.8%, p=0.04), but a higher level of education was more common (58.8% vs 35.9%, p=0.002), compared with patients with Q-No score ≤15; the latter retained statistical significance in multivariate regression analysis (p=0.009, OR [95%CI]: 2.29, [1.23-4.25]). Total Q-No scores were higher in the COVID-19-period compared to the pre-COVID-19 era [median (range); 12 (4-20) vs 11 (4-20), p=0.02]. Among 78 patients with available Q-No questionnaires in the pre-COVID-19 era, 11 (14.1%) displayed nocebo behaviour, which increased to 16 (20.5%) amid the COVID-19 pandemic. Interim development of nocebo behaviour was also associated with higher educational level (p=0.049, OR: 3.65, 95%CI: 1.005-13.268).

CONCLUSION

A considerable proportion of ARD patients manifested nocebo-prone behaviour during the COVID-19 pandemic, which was more common among those with high educational level.

High 3-year golimumab survival in patients with rheumatoid arthritis, ankylosing spondylitis and psoriatic arthritis: real world data from 328 patients

OBJECTIVES

Our primary objective was to study the long-term survival on drug (SOD) of patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA) and ankylosing spondylitis (AS) treated with golimumab (GLM) in real life settings.

METHODS

This was a retrospective, observational study of all patients treated with GLM in 4 Academic Centres in Greece during a 4-year period (09/2010-06/2014). SOD was analysed using Kaplan-Meier survival analysis, while Cox regression analysis estimating hazard ratios (HRs) for different baseline variables associated with drug discontinuation was performed for each disease.

RESULTS

328 patients (RA: 166, PsA: 82, AS: 80) were included. The estimated SOD at 2 and 3 years was 68% and 62% overall and was better for AS (79% and 76%) compared to RA (69% and 60%, p=0.067) and PsA (58% and 53%, p=0.001) patients; no difference was noted between RA and PsA patients (p=0.204). There was no difference in SOD between biologic-naïve and experienced nor between non-biologic co-treated or GLM monotherapy treated patients. Seropositivity (rheumatoid factor and/or anti-cyclic citrullinated peptide antibodies) was associated with a lower risk for GLM discontinuation by multivariate analysis (HR=0.5, 95% CI=0.0.25-1.1, p=0.05) in RA patients. During 606 patient-years of follow-up, 11 (3.3%) patients discontinued GLM due to adverse events (AE), accounting for 11% of treatment discontinuations. The rates of serious AEs and serious infections were 2.3 and 1.0/100-patient-years, respectively.

CONCLUSIONS

In this real-life study, GLM showed a high 3-year SOD in patients with inflammatory arthritides with a low rate of discontinuation due to AEs.

Atherosclerosis is not accelerated in rheumatoid arthritis of low activity or remission, regardless of antirheumatic treatment modalities

Objectives

RA associates with increased cardiovascular disease (CVD) morbidity and mortality due to accelerated atherosclerosis, attributed to both classical risk factors and chronic inflammation. The aim of this study was to test the hypothesis that effective disease control over 3 years modifies acceleration of atherosclerosis in RA.

Methods

Consecutive, non-diabetic RA patients previously examined by ultrasonography for subclinical atherosclerosis were re-evaluated after 3.2 (0.2) years, provided that they were in remission/low disease activity (DAS28 <3.2) for at least 75% of this period. Patients (n = 139) were demographically matched with 139 non-diabetic, non-RA control individuals studied in parallel.

Results

Patients and controls (mean age of 56 years at baseline) had a comparable burden of classical CVD risk factors. Patients' pulse wave velocity (reflecting arterial stiffness) changed by 0.07 m/s/year and left carotid intima-media thickness (reflecting wall hypertrophy) increased by 0.009 mm/year; formation of new atheromatic plaques in carotid and/or femoral arterial beds occurred in 22%. Multivariate analysis after correcting for all classical CVD risk factors and anti-hypertensive/lipid-lowering therapies demonstrated no significant differences between patients and controls in any of the subclinical atherosclerosis indices. Changes in all atherosclerosis indices from baseline to end of follow-up were comparable between those 56 patients treated with biologic DMARDs and their demographically matched patients treated with synthetic DMARDs.

Conclusion

Effective disease control may abrogate any RA-specific effect on the progression of atherosclerosis regardless of treatment. Whether early and sustained RA control translates to the CVD outcomes expected in the general population should be examined in prospective studies.

Anti-TNFα treatment for recalcitrant ulcerative necrobiosis lipoidica diabeticorum: A case report and review of the literature

INTRODUCTION

Necrobiosis lipoidica diabeticorum (NLD) is a rare degenerative connective tissue disorder associated with diabetes mellitus, which usually presents with red papules or plaques with raised edges and occasional ulceration. Ulcerating NLD is notoriously difficult to treat. We present a young patient with ulcerative NLD who was successfully treated with the anti-TNFα agent infliximab. Case presentation is followed by a review of therapeutic TNFα blockade in NLD.

CASE PRESENTATION

A 17-year old woman with type 1 diabetes since the age of 8, presented with a long-standing and extensively ulcerated and infected NLD lesion on her left shin. After achieving better glycemic control and treating her for infection of the wound, several NLD treatments failed to help, including corticosteroids and hyperbaric oxygen. She was treated successfully with 4 monthly sessions of 5mg/kg body weight intravenous infliximab, achieving complete resolution of ulceration.

DISCUSSION

A multitude of available treatments have been suggested for NLD over the past decades, based on two axes, one through wound healing and the other through immunosuppression. Anti-TNFα agents are relatively new drugs that brought a revolution in chronic inflammatory diseases and have been on the rise as novel potential treatments for NLD. Three out of the five available anti-TNFα agents have been safely tested so far, both topically and systematically, with mostly favorable results.

CONCLUSION

Intravenous infliximab was successful in the treatment of recalcitrant ulcerating NLD in our patient. Taken together with an increasing number of similar reports revealing a pathogenetic role of TNFα in NLD, we suggest that anti-TNFα agents are promising drugs in the management of this condition.

Cadherin-11 mRNA transcripts are frequently found in rheumatoid arthritis peripheral blood and correlate with established polyarthritis

Rheumatoid arthritis (RA) synovial fibroblasts hyperexpress the mesenchymal cadherin-11, which is involved also in tumor invasion/metastasis, whereas anti-cadherin-11 therapeutics prevent and reduce experimental arthritis. To test the hypothesis that cadherin-11 is aberrantly expressed in RA peripheral blood, 100 patients (15 studied serially) and 70 healthy controls were analyzed by real-time reverse transcription-PCR. Cadherin-11 mRNA transcripts were detected in 69.2% of moderately/severely active RA, versus 31.8% of remaining patients (p=0.001), versus 17.1% of controls (p<0.0001). Notably, cadherin-11 positivity correlated significantly and independently only with established (>1year) polyarthritis (>4 swollen tender joints), by multivariate logistic regression analysis including various possible clinical/laboratory factors. Rare cells of undefined nature, detected by flow cytometry following CD45(-) enrichment, strongly expressed surface cadherin-11 (estimated 10-50cells/ml of blood) in 5/6 patients with polyarticular established disease versus 1/6 patients with early RA. Studies on the potential pathogenic role of circulating cells expressing cadherin-11 in RA are warranted.

Predictors of new atherosclerotic carotid plaque development in patients with rheumatoid arthritis: a longitudinal study

Introduction

Rheumatoid arthritis (RA) is associated with increased cardiovascular morbidity and mortality attributed to both classical risk factors and chronic inflammation. We assessed longitudinally the factors associated with new carotid plaques in nondiabetic RA patients and apparently healthy individuals.

Methods

In our present prospective observational study, carotid plaques were identified by ultrasonography at baseline and follow-up end, separated by an average of 3.6 ± 0.2 years, in 64 patients (mean age 59.2 ± 12.0 and disease duration at baseline 7.8 ± 6.2 years, 83% women, clinical and laboratory evaluation every 3 to 6 months). In a substudy, 35 of the patients were matched 1:1 for traditional cardiovascular risk factors with 'healthy' controls and were studied in parallel.

Results

New atherosclerotic plaques formed in 30% of patients (first plaque in 9%) who were significantly older than the remaining patients. Tobacco use, blood pressure, body mass index, average cumulative low-density lipoprotein, high-sensitivity C-reactive protein, erythrocyte sedimentation rate level, RA stage, functional class, disease duration and treatment modalities during follow-up did not differ significantly between subgroups after application of the Bonferroni correction. RA was in clinical remission, on average, for approximately 70% of the follow-up time and was not different between subgroups. Multivariate analysis including all the above parameters revealed that age (P = 0.006), smoking (P = 0.009) and duration of low-dose corticosteroid use (P = 0.016) associated independently with new plaque formation. RA patients displayed similar numbers of newly formed carotid plaques to the tightly matched for traditional cardiovascular risk factors 'healthy' controls, although more patients than controls had carotid plaques at baseline.

Conclusions

Formation of new atherosclerotic plaques in this small cohort of patients with well-controlled RA depended mainly on traditional cardiovascular risk factors and corticosteroid use, whereas an adverse effect of residual systemic inflammation was not readily detectable.

Sleep disturbances and interleukin 6 receptor inhibition in rheumatoid arthritis

OBJECTIVE

Interleukin 6 (IL-6)-mediated interactions have been associated with sleep disturbances in healthy subjects. In this pilot study we examined whether administration of the IL-6 receptor antagonist tocilizumab in patients with rheumatoid arthritis (RA) affects sleep disturbances.

METHODS

Fifteen patients (13 women) with sleep disturbances at baseline received 6 monthly infusions of tocilizumab 8 mg/kg for moderately or severely active RA. Sleep quality was assessed by Pittsburgh Sleep Quality Index (PSQI), daytime sleepiness by Epworth Sleepiness Scale, disease activity by the 28-joint Disease Activity Score-erythrocyte sedimentation rate, functional disability by Health Assessment Questionnaire Disability Index (HAQ-DI), and fatigue by the Functional Assessment of Chronic Illness Therapy (FACIT-Fatigue Scale; FFS) at baseline and first, second, third, and sixth month of treatment. Medications used before enrollment remained unchanged during followup.

RESULTS

Sleep quality improved and daytime sleepiness decreased significantly at first-month assessment (p < 0.00001 and p < 0.004, respectively, by repeated measurement analysis) compared to baseline, and these changes became more evident through 6 months. Disease activity decreased, fatigue decreased, and functional status improved significantly. Changes in PSQI score over time were not associated with the corresponding changes in DAS28-ESR (r = 0.37, p = 0.17), but correlated significantly with HAQ-DI changes (r = 0.60, p = 0.02) and marginally with changes in FFS scores (r = -0.46, p = 0.08).

CONCLUSION

Improvement of sleep quality after tocilizumab treatment in patients with RA does not appear to directly result from decreased disease activity, further suggesting that aberrant IL-6 regulation is associated with sleep disturbances.

Early effects of IL-6 receptor inhibition on bone homeostasis: a pilot study in women with rheumatoid arthritis

OBJECTIVES

A critical role of interleukin-6 (IL-6) in bone homeostasis has been suggested in experimental studies. We examined whether inhibition of IL-6 receptor in patients with rheumatoid arthritis (RA) results in early alterations of circulating markers of bone remodelling.

METHODS

Circulating levels of osteoprotegerin, receptor activator of nuclear factor-kappaB ligand (RANKL), Wnt signalling pathway inhibitors Dickkopf-1 (Dkk-1) and sclerostin, markers of bone resorption (C-terminal cross-linking telopeptide of collagen type-I (CTX), tartrate-resistant acid phosphatase isoform-5b) and bone formation (bone-specific alkaline-phosphatase, osteocalcin) were examined in 22 women with active RA before and after two monthly infusions of tocilizumab (8mg/kg each); 'healthy', non-osteopenic, 1:1 age-matched women served as controls.

RESULTS

At baseline, osteoprotegerin/RANKL ratio in patients was lower than controls by 5-fold; circulating osteoprotegerin correlated negatively with corresponding 28-joint-count disease activity scores and circulating RANKL correlated positively with C-reactive protein. Also, Dkk-1, sclerostin, CTX and osteocalcin levels were higher in RA than controls. After two months, osteoprotegerin/RANKL ratio increased, Dkk-1 decreased and sclerostin increased comparing to baseline; other markers did not change significantly. Increases of osteoprotegerin/RANKL ratio were more prominent in 10 patients who achieved remission or low disease activity after tocilizumab than in 12 patients who did not. In contrast, the significant alterations of both Wnt inhibitors were comparable between these patient subgroups.

CONCLUSIONS

Anti-IL-6 therapy induced suppression of the inflammatory response affects rapidly the disrupted bone homeostasis in active RA. An additional, possibly specific, effect of IL-6 receptor inhibition on bone remodelling in humans should be further examined.

A pilot study of endothelial dysfunction and aortic stiffness after interleukin-6 receptor inhibition in rheumatoid arthritis

Interleukin (IL)-6 is a pleiotropic proinflammatory cytokine involved in the pathogenesis of both atherosclerosis and rheumatoid arthritis. The role of the IL-6/IL-6 receptor pathway in the documented acceleration of atherosclerosis in rheumatoid arthritis has not been examined. In a non-randomized prospective pilot study we asked whether endothelial dysfunction, defined as impaired flow mediated dilatation (FMD), and aortic stiffness, assessed by pulse wave velocity (PWV) improve after 3 and 6 monthly therapeutic infusions of the anti-IL-6 receptor antibody tocilizumab for active rheumatoid arthritis. We found that FMD increased from 3.3 ± 0.8 to 4.4 ± 1.2 to 5.2 ± 1.9% (p = 0.003), whereas PWV decreased from 8.2 ± 1.2 to 7.7 ± 1.3 to 7.0 ± 1.0m/s (p < 0.001). Whether these beneficial arterial changes are direct effects of the IL-6/IL-6 receptor pathway inhibition, maintained over time and translate into better clinical outcome warrants further studies.

A single infliximab infusion vs corticosteroids for acute panuveitis attacks in Behçet's disease: a comparative 4-week study

OBJECTIVE

To compare a single infusion of the anti-TNF antibody infliximab vs CSs for acute panuveitis attacks in Behçet's disease (BD).

METHODS

A prospective, observational study of patients with panuveitis, who received either an infliximab infusion (5 mg/kg, 19 eyes) or high-dose methylprednisolone intravenously (1 g/day for 3 days, 8 eyes), or intra-vitreal triamcinolone acetonide (4 mg, 8 eyes) at attack's onset. Baseline maintenance therapy remained unchanged during the following 30 days. Visual acuity, anterior chamber cells, vitreous cells and inflammation of the posterior eye segment were assessed at baseline and at Days 1, 7, 14 and 29 (±1) post-treatment.

RESULTS

While no significant differences were noted between i.v. and intra-vitreal CSs, infliximab was faster than CSs in decreasing total ocular inflammation scores and fundus inflammation scores (P = 0.01 and P < 0.0001 for treatment × time(2) interaction, respectively, using generalized estimating equation analysis). Independently of time, infliximab was superior to CSs in clearing retinal vasculitis (P < 0.003), as well as in resolution of retinitis (P = 0.008) and cystoid macular oedema (P < 0.007). Moreover, a faster regression of cystoid macular oedema was observed with infliximab compared with CSs (P < 0.03). The beneficial effects of the three treatment modalities on visual acuity were comparable from baseline to the end of follow-up. No side effects were noted with infliximab or methylprednisolone, whereas intra-vitreal triamcinolone acetonide caused ocular hypertension in four of the eight eyes, requiring surgical intervention in two.

CONCLUSION

A single infusion of infliximab should always be considered, even as an adjunct therapy, for the control of acute panuveitis attacks in BD.

Subclinical peripheral arterial disease in rheumatoid arthritis

OBJECTIVE

Rheumatoid arthritis (RA) is associated with accelerated atherosclerosis in the carotid arteries, but little is known about the magnitude of this process in peripheral arteries. Assessing preclinical atherosclerosis in both arterial beds in RA might provide additional prognostic value during risk stratification for primary prevention. Therefore in the present structural study we examined femoral versus carotid subclinical atherosclerosis in RA and controls.

METHODS

Intima-media thickness (IMT) and atheromatous plaque presence and vulnerability in femoral versus carotid arteries were examined in 80 RA patients without overt cardiovascular disease or diabetes and 80 controls matched 1:1 for age, gender and traditional cardiovascular disease risk factors.

RESULTS

Femoral IMT and plaque prevalence were increased in RA than controls (p=0.001 and 0.008, respectively). These increases remained significant after adjustment for potentially confounding factors that differed between groups, such as C-reactive protein and HDL-cholesterol serum levels, and statin use. Femoral plaque vulnerability did not differ between RA and controls. The presence of RA was found to be an independent predictor of increased femoral IMT (p=0.004), after adjustment for traditional cardiovascular risk factors, C-reactive protein and treatment with angiotensin converting enzyme inhibitors and statins. Femoral plaques were less frequent than carotid plaques in RA patients (22.5% vs 45.0% respectively, p=0.003) and in contrast to carotid plaques were independent of age and glucose levels.

CONCLUSIONS

Subclinical peripheral atherosclerosis in RA is more advanced than in controls. Prospective studies are required to confirm that RA is an independent risk factor for peripheral arterial disease.