Screening for atherosclerosis in patients with rheumatoid arthritis: comparison of two in vivo tests of vascular function

Disease activity as a risk factor for venous thromboembolism in rheumatoid arthritis analysed using time-averaged DAS28CRP: a nested case-control study

The objective of this study is to clarify the clinical features and risk factors of venous thromboembolism (VTE) in patients with rheumatoid arthritis (RA). We retrospectively reviewed the prevalence of VTE in RA patients who visited Hokkaido University Hospital from 2010 to 2019 and had more than 2 years of follow-up. To explore the risk to develop VTE, we selected 260 RA patients without VTE (non-VTE) via density sampling and identified the risk factors for VTE by multivariate logistic regression analysis. Univariate conditional logistic regression analysis showed older age (p < 0.0001, Odds Ratio [OR] 1.08, 95% Confidence Interval [CI] 1.04-1.14), increase of the body mass index (BMI) (p = 0.001, OR 1.17, 95% CI 1.06-1.31), higher prevalence of RA-associated lung disease (p = 0.002, OR 2.10, 95% CI 1.33-3.30) and more frequent glucocorticoid usage (p = 0.001, OR 2.09, 95% CI 1.34-3.51) in RA patients was associated with the development of VTE significantly. Furthermore, patients with higher time-averaged disease activity score 28 (DAS28) CRP were at elevated risk (p < 0.0001, OR 3.25, 95% CI 1.94-6.12). In conditional multivariate logistic regression analysis, time averaged DAS28CRP was significantly associated with the development of VTE (p = 0.0001, adjusted OR 3.40, 95% CI 1.77-7.85). Disease activity was identified as a major risk factor of VTE in patients with RA, suggesting that sustained clinical remission could be beneficial for decrease the risk of VTE.

Cardiovascular Risk Markers and Major Adverse Cardiovascular Events in Psoriatic Arthritis Patients

BACKGROUND

Psoriatic arthritis is a chronic inflammatory arthropathy that affects 14%- 30% of patients with skin and/or nail psoriasis, leading to severe physical limitations and disability. It has been included in the group of spondyloarthropathy with which it shares clinical, radiologic, and serologic features in addition to familial and genetic relationship. Beyond skin and joint involvement, psoriatic arthritis is characterized by a high prevalence of extra-articular manifestation and comorbidities, such as autoimmune, infectious and neoplastic diseases. In particular, an increased risk of cardiovascular comorbidity has been observed in psoriatic arthritis patients.

METHODS

A systematic search was performed in the electronic databases (PubMed, Web of Science, Scopus, EMBASE) up until January 2017. Studies were included if they contained data on CV disease and/or risk factors in PsA and each article was then reviewed for quality and clinical relevance. After completing the literature search all screened literature was summarized and discussed in our study group (CaRDDs study group). All literature and comments were included in the systematic review.

RESULTS

The initial search produced 278 abstracts, which were narrowed to 83 potentially relevant articles by preliminary review of the titles and by excluding review articles and case report (n = 195). Thirty articles were deemed ineligible after examining the abstracts. Full texts of the remaining 53 articles were retrieved. The majority of articles excluded were due to only providing data on patients with psoriasis or due to being not relevant to the CV risk in PsA. In the end, 32 articles were deemed eligible for this review.

CONCLUSION

Psoriatic arthritis appeared significantly associated with subclinical atherosclerosis and endothelial dysfunction and, in turn, with an increased cardiovascular risk. Thus, patients with psoriatic arthritis may benefit from a periodic assessment of surrogate markers of cardiovascular risk. This could help to establish more specific cardiovascular prevention strategies for these patients.

Inhibition of endothelial progenitor cells may explain the high cardiovascular event rate in patients with rheumatoid arthritis

BACKGROUND

Rheumatoid arthritis (RA) patients may suffer cardiovascular (CV) events much more than the general population, and CV disease is the leading cause of death in patients with RA. Our hypothesis was that impaired function of endothelial progenitor cells may contribute to endothelial dysfunction and the clinical CV events of patients with RA.

METHODS

About 27 RA patients (9 males and 18 females) with an active disease and 13 healthy subjects who served as the control group (nine males and four females) were enrolled to this prospective study. The ability to grow in culture colony-forming units of endothelial progenitor cells (CFU-EPCs) was measured, as well as their endothelial function using high-resolution ultrasonography of the brachial artery, and levels of C reactive protein (CRP) in the serum. For statistical analysis, we used the Student's t-test.

RESULTS

As a group, patients with RA were older (P < 0.0001), had severe endothelial dysfunction (P<0.0001), with impaired ability to grow CFU-EPCs (P<0.0001), and a higher inflammatory state (P = 0001). No difference was observed in BMI. All RA patients had an active disease (DAS28 3.9 ± 0.9) for 9.2 ± 6.5 years. The same differences were observed in both genders.

CONCLUSIONS

Patients with RA had an impaired ability to grow EPCs and severe endothelial dysfunction. Inability to grow colonies of EPCs reflects the impaired regenerative capacity of patients with RA and may explain the endothelial dysfunction and the high CV event rate among patients with RA.

Possible Modulation of Vascular Function Measures in Rheumatoid Arthritis by Homocysteine

The effect of homocysteine on cardiovascular diseases is still equivocal, especially in rheumatoid arthritis patients. In this investigation, the association between homocysteine with blood flow and vascular resistance in rheumatoid arthritis was examined. Serum levels of homocysteine were determined in thirty-one rheumatoid arthritis patients and nineteen apparently healthy subjects using ELISA. Additionally, strain-gauge plethysmography was used to determine both forearm blood flow and vascular function at rest and after occlusion. Forearm occlusion blood flow (patients: 21.9 ± 6.55 versus control: 25.5 ± 6.10ml/100mL/min) was lower (p < 0.05) while occlusion vascular resistance (patients: 4.77 ± 2.08 versus controls 3.05 ± 0.96U) was greater (p < 0.01) in rheumatoid arthritis than in the controls. Level of serum homocysteine was similar (p = 0.803) in rheumatoid arthritis group and healthy group. In addition, level of serum homocysteine was correlated with resting blood flow (r = −0.41; p < 0.02) and resting vascular resistance (r = 0.31, p < 0.05) in the patients group. The study confirms altered vascular function in rheumatoid arthritis. Uniquely, the results show that homocysteine was related to resting, but not postischemia, vascular measures. These relationships indicate that homocysteine might impact the vasculature in rheumatoid arthritis.

Vascular Endothelial Dysfunction in Inflammatory Bowel Diseases: Pharmacological and Nonpharmacological Targets

Inflammatory bowel diseases, including Crohn's disease and ulcerative colitis, are chronic inflammatory conditions involving primarily the gastrointestinal tract. However, they may be also associated with systemic manifestations and comorbidities. The relationship between chronic inflammation and endothelial dysfunction has been extensively demonstrated. Mucosal immunity and gastrointestinal physiology are modified in inflammatory bowel diseases, and these modifications are mainly sustained by alterations of endothelial function. The key elements involved in this process are cytokines, inflammatory cells, growth factors, nitric oxide, endothelial adhesion molecules, and coagulation cascade factors. In this review, we discuss available data in literature concerning endothelial dysfunction in patients affected by inflammatory bowel disease and we focus our attention on both pharmacological and nonpharmacological therapeutic targets.

Endothelial function in rheumatoid arthritis

BACKGROUND

Rheumatoid arthritis (RA) patients are at higher risk of accelerated atherosclerosis.

AIMS

To assess endothelial dysfunction in RA to find a possible mechanistic pathway that will explain the clinical phenomenon.

METHODS

A prospective study recruited 44 RA patients with an active long standing (>12 months) disease. All underwent a detailed assessment of disease activity. To estimate the endothelial function the brachial artery method was performed, measuring flow mediated diameter percent (FMD%) change. Clustering analyses (hierarchical and k-means) were performed. Patients were compared to healthy subjects.

RESULTS

Forty four RA patients (54.42 ± 11.14 years, females (72.7%)) with co-morbidities (70.5%), not taking tumor necrosis factor-blockers or disease modifying anti rheumatic drugs (63.6%). Only 6 (13.6%) had a normal endothelial function. Hierarchical and k-means clustering techniques showed statistically significant differences among the three clusters concerning disease activity score-28 (DAS-28)- erythrocyte sedimentation rate (ESR) (P = 0.000), DAS-28- C-reactive protein (CRP; P = 0.001), clinical disease activity index (P = 0.002), simplified disease activity index (P = 0.001), ESR (P = 0.000), (CRP) (P = 0.003) and FMD% (P = 0.009). The group with the highest FMD% values exhibited the lowest clinical scores and laboratory parameters. Patients with the lowest FMD% values co-clustered with subjects with positive but low FMD% changes and elevated clinical and laboratory parameters.

CONCLUSIONS

Our study confirmed the feasibility of exploiting endothelial function in clinical practice as an early predictor of atherosclerosis in RA patients.

Recent updates on echocardiography and ultrasound for Kawasaki disease: beyond the coronary artery

Kawasaki disease (KD) is a systemic vasculitis with a predilection for damage to the coronary arteries. In the acute phase, clinical decision making for KD relies on the measurements of the coronary z-score obtained by 2-dimensional echocardiography (2DE). In the convalescent phase, KD patients with coronary artery abnormalities (CAAs) eventually show arteriosclerotic vascular remodeling characterized by marked intimal proliferation and neoangiogenesis after KD vasculitis, which often induces myocardial ischemia. To date, several well-established surrogate markers including dobutamine stress echocardiography (DSE), the carotid intima-media thickness (CIMT) and flow-mediated dilatation (FMD), have been made available for risk assessment and the prediction of cardiovascular disease (CVD) in KD patients. Additionally, the use of carotid contrast-enhanced ultrasonography (CEUS), has enabled the visualization and quantification of the adventitial vasa vasorum (VV) network, assessing active vascular remodeling at remote arterial sites in KD patients with CAAs. However, there was no evidence of major vascular structural changes in KD patients in whom CAAs had never been detected. Thus, assessment of multiple modalities using 2DE may provide direct information not only on the vascular health but also on the stratification of the risk of CVD in KD patients with CAAs.

Cardiovascular Imaging Techniques in Systemic Rheumatic Diseases

The risk of cardiovascular (CV) events and mortality is significantly higher in patients with systemic rheumatic diseases than in the general population. Although CV involvement in such patients is highly heterogeneous and may affect various structures of the heart, it can now be diagnosed earlier and promptly treated. Various types of assessments are employed for the evaluation of CV risk such as transthoracic or transesophageal echocardiography, magnetic resonance imaging (MRI), and computed tomography (CT) to investigate valve abnormalities, pericardial disease, and ventricular wall motion defects. The diameter of coronary arteries can be assessed using invasive quantitative coronarography or intravascular ultrasound, and coronary flow reserve can be assessed using non-invasive transesophageal or transthoracic ultrasonography (US), MRI, CT, or positron emission tomography (PET) after endothelium-dependent vasodilation. Finally, peripheral circulation can be measured invasively using strain-gauge plethysmography in an arm after the arterial infusion of an endothelium-dependent vasodilator or non-invasively by means of US or MRI measurements of flow-mediated vasodilation of the brachial artery. All of the above are reliable methods of investigating CV involvement, but more recently, introduced use of speckle tracking echocardiography and 3-dimensional US are diagnostically more accurate.

Association between antibodies to carbamylated proteins and subclinical atherosclerosis in rheumatoid arthritis patients

BACKGROUND

Rheumatoid arthritis (RA) patients carry a high risk of cardiovascular morbidity and mortality. The excess of cardiovascular disease cannot be entirely explained by traditional risk factors and the immune system contributes to the development of atherosclerosis. Moreover, post-translational modifications such as citrullination and carbamylation have been linked to inflammation and atherosclerosis. Anti-carbamylated proteins antibodies (anti-CarP) are a new subset of autoantibodies identified in RA patients. This study aimed to investigate a possible association between anti-CarP and subclinical atherosclerosis in RA patients.

METHODS

We enrolled RA patients and normal healthy controls (NHS) without known cardiovascular risk factors or heart disease. Cardiovascular risk was assessed using the Modified Systemic Coronary Risk Evaluation (mSCORE). Anti-CarP were investigated by a solid phase "home-made" ELISA. Anti-citrullinated protein antibodies (ACPA) and Rheumatoid Factor (RF) were investigated by ELISA assays. Subclinical atherosclerosis was evaluated by brachial artery Flow-Mediated Dilatation (FMD) and Carotid Intima-Media Thickness (c-IMT) while arterial stiffness by Ankle-Brachial Index (ABI) and Cardio-Ankle Vascular Index (CAVI).

RESULTS

We enrolled 50 RA patients (34 F and 16 M, mean age 58.4 ± 13.1 years, mean disease duration 127 ± 96.7 months) and 30 age and sex matched NHS. According to the mSCORE, 58% of patients had a low risk, 32% a moderate and 8% a high risk for cardiovascular disease. FMD was significantly lower in RA patients than in NHS (5.6 ± 3.2 vs 10.7 ± 8.1%; p < 0.004) and CAVIs significantly higher in a RA patients compared to NHS (left CAVI 8.9 ± 1.7 vs 8.1 ± 1.5; p < 0.04 for and right CAVI 8.8 ± 1.6 vs 8.0 ± 1.4; p < 0.04 for the). ABI and c-IMT did not differ between the two populations. The multivariate regression analysis showed a significant association of anti-CarP antibodies with FMD, left and right CAVI and both c-IMT (r = 1.6 and p = 0.05; r = 1.7 and p = 0.04; r = 2.9 and p = 0.05; r = 1.5 and p = 0.03; r = 1.1 and p = 0.03 respectively).

CONCLUSIONS

This study confirms that RA patients, without evidence of cardiovascular disease or traditional risk factors, have an impaired endothelial function. Moreover, we found an association with anti-CarP antibodies suggesting a possible contribution of these autoantibodies to endothelial dysfunction, the earliest stage of atherosclerosis. Besides ultrasound assessment, anti-CarP should be assessed in RA patients and considered an additional cardiovascular risk factor.

Relationship between asymmetric dimethylarginine and endothelial dysfunction in patients with rheumatoid arthritis

OBJECTIVE

In rheumatoid arthritis (RA), endothelial dysfunction caused by the inflammatory process increases the risk of cardiovascular disease. Asymmetric Dimethylarginine (ADMA) leads to vascular dysfunction, whereas atherosclerosis and increased ADMA is associated with cardiovascular disease risk factors. Flow-mediated Dilation (FMD) is a radiological method to demonstrate endothelial dysfunction. In the present study, we assessed the availability of ADMA as a marker for endothelial dysfunction in RA patients. ADMA can be used as a simple and cheaper method for the determination of endothelial dysfunction.

MATERIAL AND METHODS

Forty patients (1 male, 39 female) diagnosed with RA according to the classification criteria and 29 healthy volunteers (2 males, 27 females) were included in this study. ADMA was studied by enzyme-linked immunosorbent assay (ELISA). Chi-square, Fisher's exact test, Mann-Whitney U test, and Spearman's correlation tests were used for analytical analysis, and p<0.05 was considered as the level of statistical significance.

RESULTS

In our study, ADMA levels were significantly higher in RA patients. The ADMA level was inversely correlated with FMD. Although high levels of both C-reactive protein and ADMA were detected in patients with high disease activity, there was no statistically significant difference between these parameters (p=0.18). There were statistically significant negative correlations between FMD and age and disease duration (p=0.01, p=0.01). However, there were no statistically significant correlations with erythrocyte sedimentation rate, rheumatoid factor, and disease activity score (p=0.68). In RA patients, there was a statistically significant positive correlation between disease duration and ADMA, whereas a negative correlation was found between FMD and ADMA (p<0.05).

CONCLUSION

Our results support the hypothesis that ADMA may be used in the assessment of endothelial dysfunction in patients with RA. It will be cost-effective when commonly used. ADMA may be used in the assessment of endothelial dysfunction in patients with RA.

Tetrahydrobiopterin Supplementation Improves Endothelial Function But Does Not Alter Aortic Stiffness in Patients With Rheumatoid Arthritis

BACKGROUND

Rheumatoid arthritis is a systemic inflammatory condition associated with increased cardiovascular risk that may be due to underlying endothelial dysfunction and subsequent aortic stiffening. We hypothesized that supplementation with tetrahydrobiopterin (BH4) would recouple endothelial nitric oxide synthase and thus improve endothelial function and consequently reduce aortic stiffness.

METHODS AND RESULTS

We conducted 2 randomized, double-blinded, placebo-controlled crossover studies examining 2 separate regimens: an acute regimen, with a single dose of BH4 400 mg versus placebo (n=18), and a short-term regimen, composed of a 1-week treatment with BH4 400 mg once daily versus placebo (n=15). Flow-mediated dilatation and aortic pulse wave velocity were studied 4 times, before and after each treatment phase. Acute BH4 supplementation led to an improvement of flow-mediated dilatation, whereas placebo had no effect (mean±SD of effect difference 2.56±4.79%; P=0.03). Similarly, 1-week treatment with BH4 improved endothelial function, but there was no change with placebo (mean±SD of effect difference 3.50±5.05%; P=0.02). There was no change in aortic pulse wave velocity following acute or short-term BH4 supplementation or placebo (mean±SD of effect difference: acute 0.09±0.67 m/s, P=0.6; short-term 0.03±1.46 m/s, P=0.9).

CONCLUSION

Both acute and short-term supplementation with oral BH4 improved endothelial function but not aortic stiffness. This result suggests that BH4 supplementation may be beneficial for patients with rheumatoid arthritis by improving endothelial dysfunction and potentially reducing risk of cardiovascular disease. There appears to be no causal relationship between endothelial function and aortic stiffness, suggesting that they occur in parallel, although they may share common risk factors such as inflammation.

Clinical assessment of endothelial function in patients with rheumatoid arthritis: A meta-analysis of literature studies

BACKGROUND

Several studies reported an increased cardiovascular (CV) morbidity and mortality in patients with rheumatoid arthritis (RA). Flow-mediated (FMD) and nitrate-mediated dilation (NMD) are considered non-invasive methods to assess endothelial function and surrogate markers of subclinical atherosclerosis.

METHODS

We performed a systematic review with meta-analysis and meta-regression of literature studies evaluating the impact of RA on FMD and NMD. Studies evaluating the relationship between RA and markers of CV risk (FMD and NMD) were systematically searched in the PubMed, Web of Science, Scopus and EMBASE databases. The random-effect method was used for analyses and results were expressed as mean difference (MD).

RESULTS

A total of 20 studies (852 RA patients, 836 controls) were included in the final analysis. In detail, 20 studies with data on FMD (852 cases, 836 controls) and 5 studies with data on NMD (207 cases, 147 controls) were analyzed. Compared to controls, RA patients showed a significantly lower FMD (MD: -2.16%; 95% CI: -3.33, -0.98; P=0.0003), with no differences in NMD (MD: -0.41%; 95% CI: -2.89, 2.06; P=0.74). Interestingly, a lower FMD (MD: -2.00%; 95% CI: -3.20, -0.80; P=0.001) and no differences in NMD (P=0.49) were confirmed when excluding data on patients with early-RA. Meta-regression models showed that a more severe inflammatory status was associated with a more significant impairment in FMD.

CONCLUSIONS

RA patients show impaired FMD, which is currently considered an independent predictor of CV events. The presence of endothelial dysfunction in RA should be taken into account to plan adequate prevention strategies and therapeutic approaches.

The Extent of Subclinical Atherosclerosis Is Partially Predicted by the Inflammatory Load: A Prospective Study over 5 Years in Patients with Rheumatoid Arthritis and Matched Controls

Objective.

This prospective followup study investigated subclinical atherosclerosis in relation to traditional cardiovascular disease (CVD) risk factors and inflammation in patients with rheumatoid arthritis (RA) recruited at diagnosis compared with controls.

Methods.

Patients diagnosed with early RA were consecutively recruited into a prospective study. From these, a subgroup aged ≤ 60 years (n = 71) was consecutively included for ultrasound measurement of intima-media thickness (IMT) and flow-mediated dilation (FMD) at inclusion (T0) and after 5 years (T5). Age- and sex-matched controls (n = 40) were also included.

Results.

In the Wilcoxon signed-rank test, both IMT and FMD were significantly aggravated at T5 compared to baseline in patients with RA, whereas only IMT was significantly increased in controls. In univariate linear regression analyses among patients with RA, the IMT at T5 was significantly associated with age, systolic blood pressure (BP), cholesterol, triglycerides, Systematic Coronary Risk Evaluation (SCORE), and Reynolds Risk Score at baseline (p < 0.05). Similarly, FMD at T5 was significantly inversely associated with age, smoking, systolic BP, SCORE, and Reynolds Risk Score (p < 0.05). A model with standardized predictive value from multiple linear regression models including age, smoking, BP, and blood lipids at baseline significantly predicted the observed value of IMT after 5 years. When also including the area under the curve for the 28-joint Disease Activity Score over 5 years, the observed value of IMT was predicted to a large extent.

Conclusion.

This prospective study identified an increased subclinical atherosclerosis in patients with RA. In the patients with RA, several traditional CVD risk factors at baseline significantly predicted the extent of subclinical atherosclerosis 5 years later. The inflammatory load over time augmented this prediction.

Bone erosion is associated with reduction of circulating endothelial progenitor cells and endothelial dysfunction in rheumatoid arthritis

OBJECTIVE

To identify factors influencing endothelial progenitor cell (EPC) counts in patients with rheumatoid arthritis (RA).

METHODS

The number of circulating CD34+/ vascular endothelial growth factor receptor 2-positive EPCs was measured in 126 RA patients and 46 non-RA control patients. Endothelial function was assessed by brachial flow-mediated dilation (FMD). Serum CXCL12 concentrations were determined using an enzyme-linked immunosorbent assay. EPCs and FMD were measured at baseline and after 24 weeks of anti-tumor necrosis factor (TNF) therapy in 29 patients with active RA.

RESULTS

The numbers of circulating EPCs were significantly lower in the RA patients than in the non-RA controls. In multivariate analysis, older age, reduced levels of high-density lipoprotein cholesterol, and higher bone erosion scores were independent risk factors for reduced EPC counts in RA patients. Serum CXCL12 levels correlated negatively with EPC counts, but positively with bone erosion scores. FMD was impaired in RA patients, and a decreased FMD in RA was closely associated with a higher bone erosion score and a reduced EPC count. In addition, EPC counts were restored by anti-TNF therapy, and this increase was paralleled by improvement in FMD. Interestingly, restoration of EPC counts was attenuated in patients with higher bone erosion scores than in those with lower scores, despite similar levels of improvement in disease activity.

CONCLUSION

The numbers of circulating EPCs in RA patients are reduced and are inversely correlated with serum levels of CXCL12. Reduced EPC counts are closely associated not only with bone erosion, but also with endothelial dysfunction.

The association between functional and morphological assessments of endothelial function in patients with rheumatoid arthritis: a cross-sectional study

Introduction

Patients with rheumatoid arthritis (RA) are at an increased risk for cardiovascular disease (CVD). One of the earliest manifestations of CVD is endothelial dysfunction (ED), which can lead to functional and morphological vascular abnormalities. Several non-invasive assessments of vascular function and morphology can be utilised to assess vascular health, but little is known about the association between each of these assessments in patients with RA, and they tend to be used interchangeably in the literature. The objective of the present study was to examine associations between measures of vascular function and morphology in patients with RA.

Methods

A total of 201 RA patients (155 females, median (25^th to 75^th percentile) age: 67 (59 to 73)) underwent assessments of microvascular endothelium-dependent and endothelium-independent function (laser Doppler imaging with iontophoresis of acetylcholine and sodium-nitroprusside respectively), macrovascular endothelium-dependent and endothelium-independent function (flow-mediated dilatation and glyceryl-trinitrate-mediated dilation respectively), and vascular morphology (pulse wave analysis, carotid intima-media thickness (cIMT), and carotid plaque).

Results

Spearman's correlations revealed that from the functional parameters, only macrovascular endothelium-independent function was inversely associated with cIMT (-0.294 (P < 0.001)) after applying the Bonferroni correction for multiple comparisons. For carotid plaque, t tests showed that macrovascular endothelium-independent function was lower in patients with plaque than without (15.5 ± 8.3 vs. 23.1 ± 9.1%, P = 0.002, respectively).

Conclusions

With the exception of macrovascular endothelium-independent function, all other measures of vascular function were not associated with vascular morphology. This suggests that different assessments of vascular function and morphology in patients with RA reflect quite distinct mechanisms and phases of the atherosclerotic process and should not be used interchangeably.

Is There Any Relationship between Joint Destruction and Carotid Intima-media Thickness in Patients with Rheumatoid Arthritis?

[Purpose] The purpose of this study was to investigate the possible relationship between joint destruction and carotid intima-media thickness in patients with rheumatoid arthritis. [Subjects and Methods] Thirty-four RA patients and 31 healthy controls were enrolled in this study. The disease activity for 28 joints was recorded for each patient using the erythrocyte sedimentation rate (DAS28ESR), a visual analog scale (VAS0-10 cm), and a disability index, the health assessment questionnaire (HAQ). X-ray imagesof the patients were scored according to the modified Sharp/van der Heijde method, and the common carotid intimal medial thickness (CIMT) was automatically measured with software using high-resolution Doppler ultrasound. [Results] Contrary to our hypothesis, the modified total Sharp score (mTSS) and CIMT were not significantly associated. The erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) levels of the RA patients and the right CIMT, left CIMT, and mean CIMT scores were significantly elevated. Positive correlation was detected between the mean CIMT score and age, CRP levels, LDL concentration and triglycerides (TG) level. In the regression model, where the mean CIMT was the independent variable and age, CRP, LDL, and TG were dependent variables, age was found to be an independent predictor of CIMT. [Conclusions] Patients suffering from RA require close monitoring for cardiovascular risks, and the comorbidity of age-related cardiovascular disease should not be overlooked.

Common carotid artery intima-media thickness is useful for diagnosis of the acute stage of Kawasaki disease

Background

This study aimed to investigate intima-media thickness (IMT) of the common carotid arteries in children with acute Kawasaki disease (KD).

Methods

Between 2009 and 2011, patients fulfilling the criteria for KD, including a fever lasting >5 days, were prospectively enrolled in this study. Laboratory data, echocardiography, and IMT were measured and compared with matched controls.

Results

A total of 70 common carotid IMTs were measured in 35 children. We studied 21 patients aged 3–60 months old with acute KD and 14 febrile patients aged 3–194 months old with acute infection and similar characteristics to those of KD patients. Children with KD had a significantly higher IMT compared with the controls (0.550 ± 0.081 mm vs. 0.483 ± 0.046 mm, P = 0.01).

Conclusions

IMT during the acute stage of KD is increased, suggesting that IMT could be a useful diagnostic tool in the early diagnosis of KD.

Effects of 6 months of abatacept treatment on aortic stiffness in patients with rheumatoid arthritis

BACKGROUND

Systemic inflammation plays an important role in the increased cardiac risk observed in rheumatoid arthritis (RA). Effective control of inflammation and disease activity may be of benefit in reducing cardiovascular risk in RA patients.

OBJECTIVE

Our study was conducted in patients with active RA to investigate the effects of 24-week abatacept treatment on aortic stiffness measured by pulse wave velocity (PWV).

RESULTS

The study included 21 patients, of whom 17 were females, with a mean age of 65.2±13.7 years. Ten patients had positive rheumatoid factors, 16 positive anti-citrullinated protein antibodies, and 19 presented an erosive form of RA. Sixteen patients were nonresponders to anti-tumor necrosis factor-alpha treatments. After 6 months of abatacept treatment, there was a significant increase in PWV levels (9.8±2.9 versus 8.5±3.9 m/second; P=0.02). A nonsignificant increase in total cholesterol and low-density lipoprotein cholesterol was observed. There was also a significant increase in high-density lipoprotein cholesterol levels, which led to a nonsignificant decrease in atherogenic index. The improvement in disease activity was significant, and there was a decrease of systemic inflammatory parameters, but without reaching statistical significancy. Changes in PWV were significantly correlated with changes in Disease Activity Score on 28 joints based on erythrocyte sedimentation rate (r=0.46; P=0.035) and in high-density lipoprotein cholesterol (r=-0.38; P=0.046). No correlation was observed with changes in C-reactive protein and in other parameters of lipid profile or in steroid dose.

CONCLUSION

The worsening of aortic stiffness found after 6 months of abatacept therapy might be due to an insufficient decrease in systemic inflammation.

Endothelial function and cardiovascular risk in active inflammatory bowel diseases

BACKGROUND

Endothelial dysfunction has been already reported in inflammatory bowel diseases (IBD). However, case series so far examined were rather heterogeneous as for disease severity and subsets investigated.

OBJECTIVE

We evaluated endothelial dysfunction by brachial artery flow-mediated vasodilatation (FMD), and subclinical atherosclerosis by assessment of common carotid intima-media thickness (CCA-IMT) in a cohort of patients with Crohn's disease (CD) or Ulcerative colitis (UC) in active phase compared to healthy control subjects.

METHODS

Forty-nine patients (mean age 41±16 years), 25 with CD and 23 with UC, and forty controls (mean age 45±15 years) were enrolled. Diagnosis was based on the standard clinical, endoscopic and histological criteria. Disease activity was assessed by Crohn's Disease Activity Index or Disease Activity Index. All patients, were under medical treatment as appropriate.

RESULTS

FMD values were lower in IBD patients than controls (6.1±3.0 vs 8.2±3.4. p=0.003); no difference was seen between UC/CD groups (5.9±3.5 vs 6.3±2.6, p=0.67). No changes in statistical differences occurred after adjustment for age, gender, body mass index and family history of cardiovascular disease. Finally, no differences in IMT values were seen between IBD patients and controls. Disease duration and medical treatment did not affect endothelial function.

CONCLUSIONS

Our study showed a lower FMD in IBD patients. Inflammation and immune response could explain endothelial dysfunction, which is the earliest stage of atherosclerotic process. IBD patients in active phase might therefore be at higher risk for atherosclerosis progression.

Cardiovascular risk in rheumatoid arthritis: pathogenesis, diagnosis, and management

Rheumatoid arthritis is characterized by early and accelerated atherosclerosis leading to increased cardiovascular morbidity and mortality. Beyond traditional cardiovascular risk factors, several pathogenetic mechanisms have been proposed, including emerging inflammatory and autoimmune mechanisms. Inflammatory stimuli are now believed to cause vascular damage, which can be estimated by well-established noninvasive techniques. Carotid intima-media thickness, pulse-wave velocity and flow-mediated dilatation, markers of subclinical atherosclerosis, arterial stiffness, and endothelial function, respectively, have been recently used to detect vascular dysfunction in the wide spectrum of autoimmune diseases. The role of anti-tumor necrosis factor α and novel biologic agents remains unclear, although early control of the inflammatory process seems crucial for reducing cardiovascular risk. Considering the importance of cardiovascular risk management, further well-designed studies are warranted to clarify the potential benefits and harms of anti-inflammatory treatment.

The role of inflammation, the autonomic nervous system and classical cardiovascular disease risk factors on subendocardial viability ratio in patients with RA: a cross-sectional and longitudinal study

INTRODUCTION

Evidence indicates that rheumatoid arthritis (RA) patients have increased susceptibility to myocardial ischaemia that contributes to myocardial infarction. The subendocardial viability ratio (SEVR) can be measured using pulse wave analysis and reflects myocardial oxygen supply and demand. The objective of the present study was to examine specific predictors of SEVR in RA patients, with a specific focus on inflammation and classical cardiovascular disease (CVD) risk factors.

METHODS

Two patient cohorts were included in the study; a primary cohort consisting of 220 RA patients and a validation cohort of 127 RA patients. All patients underwent assessment of SEVR using pulse wave analysis. Thirty-one patients from the primary cohort who were about to start anti-inflammatory treatment were prospectively examined for SEVR at pretreatment baseline and 2 weeks, 3 months and 1 year following treatment. Systemic markers of disease activity and classical CVD risk factors were assessed in all patients.

RESULTS

The SEVR (mean ± standard deviation) for RA in the primary cohort was 148 ± 27 and in the validation cohort was 142 ± 25. Regression analyses revealed that all parameters of RA disease activity were associated with SEVR, along with gender, blood pressure and heart rate. These findings were the same in the validation cohort. Analysis of longitudinal data showed that C-reactive protein (P < 0.001), erythrocyte sedimentation rate (P < 0.005), Disease Activity Score in 28 joints (P < 0.001), mean blood pressure (P < 0.005) and augmentation index (P < 0.001) were significantly reduced after commencing anti-TNFα treatment. Increasing C-reactive protein was found to be associated with a reduction in SEVR (P = 0.02) and an increase in augmentation index (P = 0.001).

CONCLUSION

The present findings reveal that the SEVR is associated with markers of disease activity as well as highly prevalent classical CVD risk factors in RA, such as high blood pressure and diabetes. Further prospective studies are required to determine whether the SEVR predicts future cardiac events in RA.

A population-based case-control study on the association between rheumatoid arthritis and deep vein thrombosis

OBJECTIVE

Chronic inflammation has been associated with endothelial dysfunction and altered coagulation status. However, at the present time, the data regarding the risk for developing deep vein thrombosis (DVT) in patients with rheumatoid arthritis (RA) is still scanty and conflicted. This study aimed to explore the frequency and association of DVT with RA using a population-based dataset.

METHODS

This was a case-control study conducted in Taiwan. A total of 5193 patients with DVT were identified from the Longitudinal Health Insurance Database 2000 (LHID2000) database. In total, 20,772 controls matched with cases in terms of gender, age, and year of index date were randomly selected. We used conditional logistic regression to calculate the odds ratio (OR) for having been previously diagnosed with RA between cases and controls.

RESULTS

Of the total 25,965 sampled subjects, 235 (0.9%) had been previously diagnosed with RA. Seventy-seven of these previous diagnoses were found among cases (1.5%) and 158 among controls (0.8%). Conditional logistic regression analysis revealed that cases were more likely to have had prior RA than controls (OR, 1.92; 95% confidence interval [CI], 1.46-2.53; P<.001). After adjusting for hospitalization history, pregnancy, fracture, surgery, cancer, inflammatory bowel disease, heart failure, hypertension, diabetes, coronary heart disease, hyperlipidemia, and renal disease, there was still a significant association between DVT and prior RA (OR, 1.88; 95% CI, 1.42-2.58; P<.001).

CONCLUSIONS

We found RA to be significantly associated with DVT. Appropriate management should be taken to minimize the risk of DVT in patients with RA. Further study is needed to confirm our findings.

Non-invasive measures of tissue autofluorescence are increased in Type 1 diabetes complications and correlate with a non-invasive measure of vascular dysfunction

OBJECTIVE

To determine if ocular and skin autofluorescence, reflecting advanced glycation end-products, and vascular stiffness correlate in non-diabetic and Type 1 diabetic subjects and if levels differ by diabetes status.

RESEARCH DESIGN AND METHODS

Patients with Type 1 diabetes (n = 69, 19 with and 50 without vascular complications) and 60 subjects without diabetes (control) had ocular and skin autofluorescence and pulse-wave analysis performed in the fasted state. Correlations between measures within groups used the Pearson or Spearman correlation-coefficient and measures between groups were compared by ANOVA.

RESULTS

Lens and skin autofluorescence correlated in control (r = 0.58, P = 0.0001) and in Type 1 diabetes (r = 0.53, P = 0.001). Corneal autofluorescence correlated with lens (r = 0.53, r = 0.52, P = 0.0001) and skin autofluorescence (r = 0.34, P = 0.01 and r = 0.49, P = 0.00001) in control and Type 1 diabetes respectively. In Type 1 diabetes, small and large artery elasticity correlated inversely and systemic vascular resistance correlated positively with skin autofluorescence (all P = 0.001), and with lens and corneal autofluorescence (all P < 0.03). In Type 1 diabetes tissue advanced glycation end-products correlated with C-reactive protein and inversely with the estimated glucose disposal rate and with circulating advanced glycation end-product levels. Relative to non-diabetic subjects, lens, corneal and skin fluorescence were increased (all P < 0.001) and small artery elasticity was decreased in diabetes (P = 0.04). Lens, corneal and skin autofluorescence were greater (all P = 0.0001) in patients with Type 1 diabetes with complications compared to those without complications, but small artery elasticity did not differ significantly.

CONCLUSIONS

Ocular and skin autofluorescence and vascular stiffness correlate in non-diabetic and Type 1 diabetes subjects and are increased in Type 1 diabetes. Tissue advanced glycation end-products correlate with vascular risk factors, including circulating advanced glycation end-products.

An observational study of endothelial function in early arthritis

BACKGROUND

Endothelial dysfunction is present in established rheumatoid arthritis, but it is not clear at what stage of the disease this abnormality develops. We set out to determine whether endothelial damage/dysfunction is present in a group of patients with early arthritis (EA) (new onset inflammatory arthritis, EA).

MATERIALS AND METHODS

Eighteen patients with EA, 48 healthy controls and 25 disease controls were recruited. Plasma was obtained for endothelial [von Willebrand factor (vWF) and soluble E-selectin] and angiogenesis markers (vascular endothelial growth factor and its receptor sFlt-1), adhesion molecules (intercellular adhesion molecule 1 and vascular cell adhesion molecule 1) and circulating endothelial cells (CECs, as a marker of endothelial damage). Microvascular endothelial function was assessed using laser Doppler perfusion imaging and macrovascular function using flow-mediated dilatation of the brachial artery.

RESULTS

von Willebrand factor and CECs (both P < 0.05) were significantly elevated in EA suggesting endothelial dysfunction and damage but were unrelated to classical laboratory markers of inflammation C-reactive protein, erythrocyte sedimentation rate or IL6. No other biomarkers was elevated in EA. Microvascular and macrovascular abnormalities were confined to endothelium-independent (smooth muscle cell) responses.

CONCLUSIONS

Endothelial damage/dysfunction is present early in the course of inflammatory arthritis but is not directly related to inflammation markers.

Advanced glycation endproducts are increased in rheumatoid arthritis patients with controlled disease

Introduction

Advanced glycation end products (AGEs) are produced and can accumulate during chronic inflammation, as might be present in patients with rheumatoid arthritis (RA). AGEs are involved in the development of cardiovascular disease. The aim of this study is to evaluate whether AGEs are increased in patients with long-standing RA and whether AGE accumulation is related to disease activity, disease severity and measures of (premature) atherosclerosis, such as endothelial activation, endothelial dysfunction and intima media thickness (IMT).

Methods

In a cross-sectional study, 49 consecutive RA patients with longstanding disease (median disease duration of 12.3 years (range 9.3 to 15.1)), receiving standard of care, were included and compared with 49 age- and sex-matched healthy controls (HC). AGEs were determined by skin autofluorescence. Disease activity was evaluated by the Disease Activity Score of 28 joints (DAS-28) score and joint damage by modified Sharp-v.d. Heijde score. Endothelial activation (soluble vascular cellular adhesion molecule-1) sVCAM-1, von Willebrand factor (vWF), thrombomodulin), endothelial dysfunction (determined by small artery elasticity (SAE)) and IMT were measured and related to AGE accumulation.

Results

AGEs were increased in RA patients (median 2.4 arbitrary units (a.u.), range 1.6 to 4.2) compared to HC (2.2, 1.3 to 3.8). RA patients had a DAS-28 score of 2.9 (0.8 to 6.9) and a modified Sharp-v.d. Heijde score of 19 (0 to 103). sVCAM-1 and vWF levels were higher in RA patients. SAE was significantly decreased in RA (3.9 ml/mmHg (1.4 to 12.2) vs. 6.1 in HC (1.7 to 12.9). IMT did not differ between the two groups. Combining both groups' AGEs correlated with vWF, sVCAM-1 and IMT, and was inversely related to SAE. In RA, AGEs had an inverse relation with SAE, but did not relate to disease activity or radiological damage. In multivariate analysis for both groups, smoking, glucose levels, vWF, SAE and male gender were significantly related to the formation of AGEs.

Conclusions

AGEs were increased in RA patients with long-standing disease and without signs of premature atherosclerosis. AGEs were related to endothelial activation and endothelial dysfunction. This supports the hypothesis that in RA AGEs may be an early marker of cardiovascular disease.

Vascular function and morphology in rheumatoid arthritis: a systematic review

OBJECTIVES

RA associates with significantly increased morbidity and mortality from cardiovascular disease (CVD). This may be due to complex interactions between traditional CVD risk factors, systemic rheumatoid inflammation and the vasculature. We reviewed the current literature to answer: (i) whether there is sufficient evidence that patients with RA have altered vascular function and morphology compared with normal controls; (ii) whether there is sufficient evidence to determine if such changes relate predominantly to systemic inflammation; and (iii) whether any changes of vascular function and morphology in RA can be modified with therapy.

METHODS

The MEDLINE database was searched to identify publications from 1974 to 1 November 2010 pertaining to vascular function and morphology in RA. The total number of articles included in the present review was 93. This included 57 cross-sectional studies, 27 longitudinal studies without randomization and 9 longitudinal studies with randomization.

RESULTS

Vascular function and morphology was impaired in RA relative to healthy controls. The majority of studies reported no associations between systemic inflammation and vascular function. Treatment with anti-inflammatory medication resulted in both transient and long-term improvements in the vasculature, but only a few studies reported associations between change in inflammation and change in vascular function and morphology.

CONCLUSION

The link between systemic inflammation and vascular function and morphology is not wholly supported by the available literature. Long-term studies examining specific predictors (including CVD risk factors) on the vasculature in RA are needed.

Interleukin 17 as a novel predictor of vascular function in rheumatoid arthritis

BACKGROUND

Rheumatoid arthritis (RA) is associated with enhanced cardiovascular (CV) risk and subclinical vascular disease. The proinflammatory milieu has been linked to premature atherosclerosis and endothelial dysfunction in RA. While interleukin 17 (IL-17) is considered pathogenic in RA, its role in determining vascular dysfunction in this disease has not been systematically assessed.

OBJECTIVES

To analyse candidate variables that might determine endothelial function in various vascular territories in a cohort of patients with RA receiving treatment with biological agents, with minimal traditional CV risk factors and low disease activity score.

METHODS

Patients with RA (n=50) receiving stable treatment with biological agents underwent measurement of conduit artery endothelial function by brachial artery flow-mediated dilatation; arterial compliance by pulse wave velocity (PWV) assessment; and endothelium-dependent microvascular testing with Endo-Pat2000 device to assess the reactive hyperaemia index (RHI). IL-17 was quantified by ELISA and disease activity was assessed by 28-joint count Disease Activity Score.

RESULTS

IL-17 was the main determinant of lower RHI in univariate and multivariate analysis. Traditional and non-traditional CV risk variables determined PWV, with a significant positive association with IL-17 in univariate and multivariate analysis. In contrast, conduit endothelial function was mainly determined by rheumatoid factor titres in univariate and multivariate analysis. Anti-cyclic citrullinated peptide titres, specific disease-modifying antirheumatic drugs or biological agents and disease activity did not determine vascular function.

CONCLUSION

In patients with RA treated with biological agents, IL-17 is a main predictor of microvascular function and arterial compliance. This study suggests that IL-17 may play a significant role in development of endothelial dysfunction and cardiovascular disease in RA.

Is Small Artery Elasticity Decreased Prior to Intima-Media Thickening in Patients with Longstanding Rheumatoid Arthritis?

Objective.

To determine small artery elasticity (SAE) in patients with longstanding rheumatoid arthritis (RA) in comparison to healthy controls, and to investigate its relation to markers of endothelial cell activation, disease activity, joint damage, and the presence of atherosclerosis.

Methods.

Forty-nine patients with RA and 50 age- and sex-matched healthy controls were studied. Traditional cardiovascular risk factors and disease-related factors were recorded. SAE was measured noninvasively by pulse-wave analysis (PWA). Endothelial activation was assessed by measuring levels of soluble vascular cell adhesion molecule-1 (sVCAM-1) and von Willebrand factor (vWF). Carotid intima-media thickness (IMT), as an indicator of subclinical atherosclerosis, was assessed using ultrasonography.

Results.

Patients with RA had higher body mass index, blood pressure, and triglyceride levels and were more often cigarette smokers compared to controls. SAE was decreased in RA patients compared to controls and was inversely related with age, smoking, blood pressure, vWF, sVCAM-1, high sensitivity C-reactive protein, and IMT. Presence of RA was independently related to SAE in multivariate linear regression analysis. SAE was inversely related with the Health Assessment Questionnaire score. No correlation was found between SAE and other disease activity markers and damage. IMT in patients and controls was not different.

Conclusion.

Small artery elasticity was decreased in patients with longstanding RA. The presence of RA was independently associated with SAE. Whereas IMT in patients with RA was not increased, we hypothesize that endothelial dysfunction, reflected by decreased SAE, is present prior to IMT thickening in these patients.

Carotid atherosclerosis predicts incident acute coronary syndromes in rheumatoid arthritis

OBJECTIVE

The role of atherosclerosis in the acute coronary syndromes (ACS) that occur in patients with rheumatoid arthritis (RA) has not been quantified in detail. We undertook this study to determine the extent to which ACS are associated with carotid atherosclerosis in RA.

METHODS

We prospectively ascertained ACS, defined as myocardial infarction, unstable angina, cardiac arrest, or death due to ischemic heart disease, in an RA cohort. We measured carotid atherosclerosis using high-resolution ultrasound. We used Cox proportional hazards models to estimate the association between ACS and atherosclerosis, adjusting for demographic features, cardiovascular (CV) risk factors, and RA manifestations.

RESULTS

We performed carotid ultrasound on 636 patients whom we followed up for 3,402 person-years. During this time, 84 patients experienced 121 new or recurrent ACS events, a rate of 3.5 ACS events per 100 patient-years (95% confidence interval [95% CI] 3.0-4.3). Among the 599 patients without a history of ACS, 66 incident ACS events occurred over 3,085 person-years, an incidence of 2.1 ACS events per 100 person-years (95% CI 1.7-2.7). The incidence of new ACS events per 100 patient-years was 1.1 (95% CI 0.6-1.7) among patients without plaque, 2.5 (95% CI 1.7-3.8) among patients with unilateral plaque, and 4.3 (95% CI 2.9-6.3) among patients with bilateral plaque. Covariates associated with incident ACS events independent of atherosclerosis included male sex, diabetes mellitus, and a cumulative glucocorticoid dose of ≥ 20 gm.

CONCLUSION

Atherosclerosis is strongly associated with ACS in RA. RA patients with carotid plaque, multiple CV risk factors (particularly diabetes mellitus or hypertension), many swollen joints, and a high cumulative dose of glucocorticoids, as well as RA patients who are men, are at high risk of ACS.

Potential role for S100A4 in the disruption of the blood-brain barrier in collagen-induced arthritic mice, an animal model of rheumatoid arthritis

Rheumatoid arthritis (RA) is an autoimmune disease associated with chronic inflammation of the joints. RA has been shown to increase the morbidity of and mortality due to cardiovascular and cerebrovascular diseases. We recently reported that cerebrovascular permeability was increased in mice with collagen-induced arthritis (CIA), an animal model of RA. S100A4, a member of the S100 family, is up-regulated in synovial fluid and plasma from RA patients. This study was aimed at evaluating a role of S100A4 in the mediation of blood-brain barrier (BBB) dysfunction in CIA mice. CIA was induced by immunization with type II collagen in mice. Cerebrovascular permeability was assessed by measurement of sodium fluorescein (Na-F) levels in the brains of control and CIA mice. Serum S100A4 concentrations in control and CIA mice were measured by enzyme-linked immunosorbent assays (ELISA). Accumulation of Na-F in the brain and serum levels of S100A4 were increased in CIA mice. Increased S100A4 levels in the serum are closely correlated with hyperpermeability of the cerebrovascular endothelium to Na-F. We investigated whether S100A4 induces BBB dysfunction using mouse brain capillary endothelial cells (MBECs). S100A4 decreased the transendothelial electrical resistance and increased Na-F permeability in the MBECs. S100A4 reduced the expression of occludin, a tight junction protein, and stimulated p53 expression in MBECs. These findings suggest that S100A4 increases paracellular permeability of MBECs by decreasing expression levels of occludin, at least in part, via p53. The present study highlights a potential role for S100A4 in BBB dysfunction underlying cerebrovascular diseases in patients with RA.

Aortic elastic properties in patients with venous thromboembolism

OBJECTIVES

The relationship between venous thrombosis (VT) and atherosclerosis is controversial in recent studies. Aortic elastic properties have a predictive value in detecting early stages of atherosclerosis. The aim of this study is to evaluate the relationship between aortic elastic properties and VT.

METHODS

Elastic properties of aorta in patients with spontaneous VT, without history of known cardiovascular disease and cardiovascular risk factors (n: 31), and in healthy subjects without cardiovascular risk factors (n: 30) were compared. Elastic properties of the aorta were assessed with transthoracic echocardiography.

RESULTS

A significant increase in aortic stiffness index (6.5 ± 1.0 versus 6 ± 0.7, P = 0.03) and a significant decrease in aortic strain and aortic distensibility were found in patients with VT compared with healthy subjects (8.4 ± 7 versus 13 ± 8, P = 0.01, 4.9 ± 4.8 versus 6.5 ± 4.4, P = 0.03, respectively).

CONCLUSIONS

Elastic properties of aorta in patients with spontaneous VT were impaired. These results may support the role of endothelial dysfunction in the pathogenesis of VT.

Comparative assessment of vascular function in autoimmune rheumatic diseases: considerations of prevention and treatment

Numerous autoimmune-inflammatory rheumatic diseases have been associated with accelerated atherosclerosis or other types of vasculopathy leading to increased cardio- and cerebrovascular disease risk. Traditional risk factors, as well as the role of systemic inflammation including cytokines, chemokines, proteases, autoantibodies, adhesion receptors and others have been implicated in the development of these vascular pathologies. The characteristics of vasculopathies may significantly differ depending on the underlying disease. While classical accelerated atherosclerosis has been associated with rheumatoid arthritis (RA), systemic lupus erythematosus (SLE) or spondyloarthropathies (SpA), obliterative vasculopathy may rather be characteristic for systemic sclerosis (SSc) or mixed connective tissue disease (MCTD). Antiphospholipid antibodies have been implicated in vasculopathies underlying SLE, antiphospholipid syndrome (APS), RA and MCTD. There is also heterogeneity with respect to inflammatory risk factors. Cytokines, such as tumor necrosis factor-α (TNF-α) or interleukin 6 (IL-6) and immune complexes are primarily involved in arthritides, such as RA, SpA, as well as in SLE. On the other hand, autoantibodies including anti-oxLDL anti-cardiolipin and anti-β2GPI are rather involved in SLE- and APS-associated vasculopathies. Regarding the non-invasive assessment of vascular function, endothelial dysfunction, overt atherosclerosis and vascular stiffness may be indicated by brachial artery flow-mediated vasodilation (FMD), common carotid intima-media thickness (ccIMT) and aortic pulse-wave velocity (PWV), respectively. These abnormalities have been described in most inflammatory rheumatic diseases. While ccIMT and stiffness are relatively stable, FMD may be influenced by many confounding factors. In addition to traditional vasculoprotection, immunosuppressive agents including corticosteroids, traditional and biologic DMARDs may have significant vascular and metabolic effects. The official EULAR recommendations on the assessment and management of cardiovascular disease in arthritides have just been published, and similar recommendations in connective tissue diseases are to be developed soon.

Early prediction of increased arterial stiffness in patients with chronic inflammation: a 15-year followup study of 108 patients with rheumatoid arthritis

OBJECTIVE

Patients with rheumatoid arthritis (RA), a chronic inflammatory disease, have increased cardiovascular morbidity and mortality. We investigated whether early markers of RA inflammatory disease activity could predict later increased levels of pulse-wave velocity (PWV) and augmentation index (AIx), 2 measures of arterial stiffness.

METHODS

In total 238 patients with early RA were followed longitudinally and 108 were available for the 15-year followup examination. Comprehensive baseline clinical and radiographic data were collected in 1992. Arterial stiffness, measured as AIx and PWV (Sphygmocor apparatus), was recorded at the 15-year followup. Adjusted logistic univariate and multivariate analyses were performed with levels of AIx and PWV as the dependent variables, and variables reflecting baseline RA disease activity as possible predictors. The validity of the final models was examined in linear regression analyses.

RESULTS

Baseline C-reactive protein (CRP) above the median predicted increased AIx (OR 3.52, 95% CI 1.04-11.90) and PWV (OR 4.84, 95% CI 1.39-16.83) at the 15-year assessment in multivariate models. Patients with elevated baseline CRP had significantly higher AIx (ß = 2.67, 95% CI 0.06-5.31, p = 0.045) and lnPWV (ß = 0.08, 95% CI 0.01-0.14, p = 0.02) after 15 years, after adjustments for age, sex, heart rate (AIx only) and mean arterial pressure.

CONCLUSION

Inflammation early in the RA disease course was associated with increased AIx and PWV after 15 years. These findings support the importance of early control of the inflammatory process in patients with RA.

Determinants of vascular function in patients with chronic gout

Epidemiologic studies have proposed a relationship between hyperuricemia and cardiovascular (CV) risk. However, it is unclear whether uric acid (UA) is an independent risk factor for CV disease (CVD) after controlling for other predisposing conditions. Gout patients might have persistent systemic inflammation, which, in addition to hyperuricemia, may potentiate CVD. This study examined vascular function and markers of CV damage in gout patients when compared with healthy controls. Brachial artery flow-mediated dilatation, arterial compliance, and microvascular function were measured. Circulating apoptotic endothelial cells and endothelial progenitor cells were quantified by FACS and circulating biomarkers of CVD by enzyme-linked immunosorbent assay. Gout patients displayed significant increases in body mass index, C-reactive protein, UA, and triglycerides and decreases in high-density lipoprotein. There were no significant differences in other CV traditional risk factors, adhesion molecules, or chemokines. Gout patients did not differ from controls in vascular function. In univariate and multivariate analysis, UA was not associated with the quantified CV risk parameters. Despite an increase in several CV risk factors, inflammation, and UA, gout patients display normal endothelial function and no increases in biomarkers of CVD. These results do not support the notion that gout is an independent risk factor for premature CVD.

Small artery elasticity is decreased in patients with systemic lupus erythematosus without increased intima media thickness

INTRODUCTION

The objectives of this study were to determine small arterial elasticity (SAE) in systemic lupus erythematosus (SLE) and to investigate its relationship with intima media thickness (IMT), accumulation of advanced glycation end products (AGEs), endothelial activation and inflammation.

METHODS

Thirty SLE patients with inactive disease and 30 age- and sex-matched healthy controls were included. Twenty patients with essential hypertension (EH) served as positive control. SAE was assessed by pulse-wave analysis using tonometric recordings of the radial artery. IMT of the carotid arteries was measured by ultrasound. AGE accumulation was assessed with an AGE-reader. Endothelial activation markers and C-reactive protein (CRP) were determined by enzyme-linked immunosorbent assay (ELISA).

RESULTS

SAE was decreased in SLE (P = 0.01) and further decreased in EH (P < 0.01) compared to healthy controls. IMT was increased in EH (P < 0.05), but not in SLE. AGE accumulation was increased in SLE (P < 0.05) and further increased in EH (P < 0.01) compared to healthy controls. Endothelial activation markers and CRP were increased in SLE but not in EH. SAE related to AGE accumulation (r = -0.370, P < 0.05), CRP (r = -0.429, P < 0.05) and creatinine clearance (r = 0.440, P < 0.05), but not to IMT and endothelial activation markers. In multivariate analysis SLE was an independent predictor of SAE.

CONCLUSIONS

SAE is decreased in SLE patients without increased IMT, independently of traditional cardiovascular risk factors. Longitudinal studies are needed to investigate whether SAE, endothelial activation and AGE accumulation are early markers for cardiovascular disease in SLE.

Disruption of the blood-brain barrier in collagen-induced arthritic mice

Patients with rheumatoid arthritis (RA) are at higher risk of developing pathological cardiovascular and cerebrovascular events than non-RA subjects. Vascular endothelial dysfunction is involved in the induction of cardiovascular events and this process is also observed in patients with RA. Endothelial dysfunction impairs the integrity of the blood-brain barrier (BBB); this phenomenon also underlies brain damage in cerebrovascular diseases. This study was aimed at evaluating the influence of a chronic inflammatory state on BBB integrity in RA using collagen-induced arthritis (CIA), an animal model of RA. CIA was induced by intradermal injection of type II collagen emulsified with Freund's complete adjuvant at the base of the tail of DBA/1 mice. Cerebrovascular permeability was assessed by measurement of sodium fluorescein (Na-F) content in the brains of CIA mice. The expression level of tight junction proteins was investigated by immunoblotting and immunofluorescence of occludin and zonula occludens-1 (ZO-1). Cerebrovascular permeability to Na-F in the brain was increased in CIA mice. This CIA-induced BBB hyperpermeability was more remarkable in the advanced stage than that in the persistent stage of the arthritis. The expression of occludin, but not that of ZO-1, was decreased by CIA. Our results indicate that the integrity of the BBB could be impaired in the inflammatory pathophysiology of RA.