The number of susceptibility loci currently associated with vasculitis is lower than in other immune-mediated diseases due in part to small cohort sizes, a consequence of the low prevalence of ...vasculitides. This study aimed to identify new genetic risk loci for the main systemic vasculitides through a comprehensive analysis of their genetic overlap.
Genome-wide data from 8467 patients with any of the main forms of vasculitis and 29 795 healthy controls were meta-analysed using ASSET. Pleiotropic variants were functionally annotated and linked to their target genes. Prioritised genes were queried in DrugBank to identify potentially repositionable drugs for the treatment of vasculitis.
Sixteen variants were independently associated with two or more vasculitides, 15 of them representing new shared risk loci. Two of these pleiotropic signals, located close to
and
, emerged as novel genetic risk loci in vasculitis. Most of these polymorphisms appeared to affect vasculitis by regulating gene expression. In this regard, for some of these common signals, potential causal genes were prioritised based on functional annotation, including
,
,
,
,
,
,
,
,
and
, each of which has key roles in inflammation. In addition, drug repositioning analysis showed that several drugs, including abatacept and ustekinumab, could be potentially repurposed in the management of the analysed vasculitides.
We identified new shared risk loci with functional impact in vasculitis and pinpointed potential causal genes, some of which could represent promising targets for the treatment of vasculitis.
This study aimed to: 1) analyze the inflammatory profile of Rheumatoid Arthritis (RA) patients, identifying clinical phenotypes associated with cardiovascular (CV) risk; 2) evaluate biologic and ...targeted-synthetic disease-modifying antirheumatic drugs (b-DMARDs and ts-DMARDs’: TNFi, IL6Ri, JAKinibs) effects; and 3) characterize molecular mechanisms in immune-cell activation and endothelial dysfunction.
A total of 387 RA patients and 45 healthy donors were recruited, forming three cohorts: i) 208 RA patients with established disease but without previous CV events; ii) RA-CVD: 96 RA patients with CV events, and iii) 83 RA patients treated with b-DMARDs/ts-DMARDs for 6 months. Serum inflammatory profiles (cytokines/chemokines/growth factors) and NETosis/oxidative stress-linked biomolecules were evaluated. Mechanistic in vitro studies were performed on monocytes, neutrophils and endothelial cells (EC).
In the first RA-cohort, unsupervised clustering unveiled three distinct groups: cluster 3 (C3) displayed the highest inflammatory profile, significant CV-risk score, and greater atheroma plaques prevalence. In contrast, cluster 1 (C1) exhibited the lowest inflammatory profile and CV risk score, while cluster 2 (C2) displayed an intermediate phenotype. Notably, 2nd cohort RA-CVD patients mirrored C3's inflammation.
Treatment with b-DMARDs or ts-DMARDs effectively reduced disease-activity scores (DAS28) and restored normal biomolecules levels, controlling CV risk. In vitro, serum from C3-RA or RA-CVD patients increased neutrophils activity and CV-related protein levels in cultured monocytes and EC, which were partially prevented by pre-incubation with TNFi, IL6Ri, and JAKinibs.
Overall, analyzing circulating molecular profiles in RA patients holds potential for personalized clinical management, addressing CV risk and assisting healthcare professionals in tailoring treatment, ultimately improving outcomes.
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•Unsupervised clustering of RA profiles revealed 3 groups with diverse inflammatory, oxidative, and netotic profiles.•RA patients without CV events but highest CV-risk showed inflammatory profiles akin to those with prior CV events.•TNFi, IL6Ri, and JAKi treatment for six months restores normal inflammatory biomolecule levels, cutting-RA-related CV-risk.•High CV risk RA serum activates neutrophils, modulates monocytes, and disrupts endothelial cells, reversed by b/ts-DMARDS.•Analyzing RA patients' molecular profiles enhances personalized management, addressing their cardiovascular risk.
The search for biomarkers that can help to establish an early diagnosis and prognosis of interstitial lung disease (ILD) is of potential interest.
polymorphisms have been implicated in the ...development of several lung disorders. Consequently, we assessed, for the first time, the role of
polymorphisms in the susceptibility and severity of ILD. A total of 436 Caucasian ILD patients (244 with idiopathic interstitial pneumonias (IIPs) and 192 with non-IIP) and 536 ethnically-matched healthy controls were genotyped for
rs833061, rs1570360, rs2010963, rs3025020, and rs3025039 polymorphisms by TaqMan assays. Pulmonary function tests were collected from all the patients. VEGF serum levels were determined by ELISA in a subgroup of patients. No
genotype, allele, carrier, or haplotype differences were found between ILD patients and controls as well as between IIP and non-IIP patients. However, an association of rs1570360 with IIP in women and also with lung function in IIP patients was found. None of the
polymorphisms were associated with VEGF levels. In conclusion, our results suggest that
does not seem to play a relevant role in ILD, although rs1570360 may influence the severity of ILD in women and a worse outcome in IIP patients.
Background Chronic inflammatory diseases have been associated with increased prevalence of subclinical atherosclerosis. Hidradenitis suppurativa (HS) is a chronic inflammatory disease involving ...intertriginous skin. Objective We sought to investigate the potential association between HS and subclinical atherosclerosis. Methods This study included 68 patients with HS and 136 age- and sex-matched healthy control subjects. Patients with history of cardiovascular events, diabetes mellitus, chronic kidney disease, or another concomitant inflammatory condition were excluded. Carotid intima-media thickness and carotid plaques were measured by carotid ultrasonography. Adjustments were made for age, sex, and traditional cardiovascular risk factors. Results Patients had greater carotid intima-media thickness values than control subjects (0.615 ± 0.097 vs 0.578 ± 0.098 mm; P = .012). Carotid plaques were also more frequent in patients than in control subjects (30.9% vs 22.1%). In the multivariable regression model adjusted for age, sex, and traditional cardiovascular risk factors, HS was significantly related to the presence of carotid plaques (odds ratio 2.99, 95% confidence interval 1.26-7.13; P = .013). Limitations Causality could not be assessed. Conclusions These results indicate an increased frequency of subclinical atherosclerosis in patients with HS. Accordingly, HS should be considered a disease associated with potentially increased cardiovascular risk.
Objective
Paraoxonase 1 (PON‐1) is a high‐density lipoprotein (HDL)–associated antioxidant enzyme that plays an important role in HDL‐mediated cardioprotection. Although genetic polymorphisms are ...known to modulate PON-1 activity, its involvement in cardiovascular disease (CVD) in rheumatoid arthritis (RA) is controversial, suggesting that other factors may modulate its function. Since anti‐HDL antibodies have been found to be related to an impaired lipid profile and occurrence of CVD in RA, this study was undertaken to examine the associations between PON-1 activity, anti‐HDL antibodies, and CVD according to PON1 genetic variants in patients with RA.
Methods
Serum PON-1 activity, using paraoxon as substrate, and IgG anti‐HDL antibodies were quantified in 212 RA patients and 110 healthy controls. The PON1 rs662 genotype (Q>R) was determined with TaqMan probes. An additional group of 13 biologics‐naive patients with RA was prospectively followed up for 3 months.
Results
PON‐1 activity was decreased in RA patients compared to healthy controls (P = 0.005), and an effect of the rs662 genotype was noted in both groups, with Q/Q homozygotes exhibiting the lowest PON‐1 activity. The distribution of rs662 genotypes did not differ between RA patients and healthy controls (P = 0.215). In patients carrying the Q/Q genotype, anti‐HDL antibodies were associated with impaired PON‐1 activity (P = 0.010), and levels of anti‐HDL antibodies were associated with decreased HDL levels (r = −0.680, P < 0.001) and higher prevalence of cardiovascular events, as determined in univariate and multivariate models. Furthermore, change in anti‐HDL antibody levels upon tumor necrosis factor blockade was an independent predictor of improved PON‐1 activity (β = −0.369, 95% confidence interval −0.669, −0.069; P = 0.024).
Conclusion
PON‐1 activity is impaired in RA in association with the rs662 genotype and anti‐HDL antibodies, the latter being recognized as a pivotal player in the link between rs662 and CVD in patients with RA.
Abstract Cardiovascular disease (CV) is the most common cause of premature mortality in patients with rheumatoid arthritis (RA). This is the result of an accelerated atherosclerotic process. Adequate ...CV risk stratification has special relevance in RA to identify patients at risk of CV disease. However, current CV risk screening and management strategies underestimate the actual CV risk in RA. Consequently, the search for additional tools that may help to identify those patients at high CV risk has become a key objective in the last years. In this regard, non-invasive surrogates, such as carotid ultrasonography, have been found to be excellent predictors of future CV events. In addition, several studies have revealed the relevance of a genetic component in the development of CV disease in RA patients. Besides an association with HLA-DRB1* shared epitope alleles other gene polymorphisms located inside and outside the HLA seem to influence the risk of cardiovascular disease in RA. Moreover, serum levels of some metabolic syndrome-related biomarkers, adipokines such as adiponectin and biomarkers of endothelial cell activation and inflammation such as Osteoprotegerin and Asymmetric dimethylarginine have recently been found useful for the prediction of CV disease in these patients. An update of the current knowledge on these potential markers, especially focused on new genetic and serological biomarkers is shown in this review.
Interleukin-6 (IL-6) is a proinflammatory cytokine that mediates pleiotropic functions in immune responses and inflammatory diseases. The literature lacks studies, with a clinical perspective, on the ...relationship between IL-6 serum levels and the characteristics of the disease in patients with systemic lupus erythematosus (SLE). In the present work, we aimed to analyze the association between circulating IL-6 and disease manifestations in a well-characterized series of patients with SLE. Serum IL-6 levels and disease activity (SLEDAI-2K), severity (Katz) and damage index (SLICC-DI), complete lipid profile, and subclinical carotid atherosclerosis were evaluated in 284 patients with SLE. In addition, a complete characterization of the complement system was performed in samples from patients with SLE. A multivariate linear regression analysis was carried out to study the relationship between clinical and laboratory characteristics of the disease and IL-6 levels. Age (beta coef. 0.07 95%CI 0.01–0.1 pg/mL, p = 0.014), C-reactive protein (beta coef. 0.21 95%CI 0.16–0.25 pg/mL, p < 0.01), and male gender (beta coef. 2 95%CI 0.3–0.5 pg/mL, p = 0.024), were positively associated with higher IL-6 levels in SLE patients. Most disease characteristics and damage and activity indices did not show significant relationships with IL-6. However, after multivariate analysis, IL-6 was associated with lower serum levels of HDL cholesterol (beta coef. −0.04 95%CI −0.08–(−0.1) pg/mL, p = 0.011), and apolipoprotein A1 (beta coef. −0.02 95%CI −0.04–(−0.001) pg/mL, p = 0.035). In contrast, the alternative complement cascade, C1inh, and C3a were all positively and independently associated with higher serum levels of IL-6. Moreover, stratification of the Systematic Coronary Risk Assessment 2 (SCORE2) results according to different categories of cardiovascular risk was associated with higher circulating serum IL-6 levels (beta coef. 0.2 95%CI 0.02–0.4, pg/mL, p = 0.028). In conclusion, in a large series of SLE patients, IL-6 was not associated with disease-related features of SLE, including damage, severity, or activity indices. However, an association was found between serum IL-6 levels and circulating C3a and cardiovascular risk. Our study emphasizes the importance that IL-6 could have in cardiovascular disease and complement system disruption of SLE patients. Therapies targeting IL-6 could have a role in these two clinical manifestations of patients with SLE.
The aim of this study was to determine the role of endothelin-1 (ET-1), a molecule involved in multiple vascular and fibrosing abnormalities, as a biomarker of interstitial lung disease (ILD), as ...well as its use for the differential diagnosis between idiopathic pulmonary fibrosis (IPF) and ILD associated with autoimmune diseases (AD-ILD), using a large and well-defined cohort of patients with ILD. A total of 112 patients with IPF, 91 patients with AD-ILD (28 rheumatoid arthritis (RA), 26 systemic sclerosis, 20 idiopathic inflammatory myositis and 17 interstitial pneumonia with autoimmune features) and 44 healthy controls were included. ET-1 serum levels were determined by enzyme-linked immunosorbent assay. A significant increase in ET-1 levels was found in patients with IPF compared to controls. Likewise, AD-ILD patients also showed higher ET-1 levels than controls when the whole cohort was stratified by the type of AD. Similar ET-1 levels were found in IPF and AD-ILD patients, regardless of the underlying AD. Interestingly, increased ET-1 levels were correlated with worse lung function in IPF and RA-ILD patients. Our study supports that serum ET-1 may be useful as a biomarker of ILD, although it could not help in the differential diagnosis between IPF and AD-ILD. Moreover, ET-1 levels may be associated with ILD severity.
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