A treat-to-target approach for gout confers renoprotective effect in patients with chronic kidney disease stage 3.

The aim of this study was to assess changes in the estimated glomerular filtration rate (eGFR) in gouty patients with chronic kidney disease (CKD) using a "treat-to-target" (T2T) approach in gout. This multicenter observational retrospective study included patients diagnosed with gout and CKD stage 3 taking xanthine oxidase inhibitors (XOIs) (allopurinol or febuxostat) for at least 12 months. All patients were treated using a T2T strategy according to national gout guidelines to achieve the target levels of serum uric acid (sUA; < 5-6 mg/dl) within 6 months of the first visit. The primary outcome was to assess changes in eGFR. The effects of independent variables were analyzed over eGFR in a linear mixed-effects (LME) model. Fifty patients with gout and CKD stage 3 treated with XOIs with a T2T strategy for 12 months were included. Eighty-two percent of the patients achieved the sUA target during the study period. The improvement seen in eGFR was higher during the first 6 months, showing a median increase of 7.54 ml/min/m2 (SE = 1.25) and trending towards stability over 12 months. For every 1 mg/dl of decrease in sUA, an improvement of 1.5 ml/min/m2 in eGFR was observed (coefficient ± SE: - 1.58 ± 0.26) (p < 0.001) with no differences between type and dosage of XOIs treatment, colchicine administration, age, sex, and smoking status. A reduction in sUA levels using a T2T approach with XOIs at an optimal dose is possible and could help conserve and improve renal function in gouty patients with CKD stage 3.

Ultrasonography in the diagnosis of suspected primary Sjögren's syndrome and concordance with salivary gland biopsy: a Spanish single-center study.

OBJECTIVE: The study aims to evaluate the utility of major salivary gland ultrasonography for diagnosis of primary Sjögren's syndrome (pSS) and to assess its concordance with minor salivary gland biopsy (MSGB). METHODS: A cross-sectional study of 72 patients with suspected pSS was performed. Demographic, clinical, and serological data were collected. MSGB was performed, as was ultrasonography. The ultrasound technician was blind to clinical, serological, and histological data. The validity of ultrasonography compared with MSGB, the American-European Consensus Group (AECG), and American College of Rheumatology (ACR)/European Alliance of Associations for Rheumatology (EULAR) criteria was assessed by calculating the percentage of agreement, sensitivity, specificity, positive and negative predictive values, and area under the curve (AUC). RESULTS: Based on MSGB as the gold standard, the percentage of agreement between both tests was 78% (AUC 0.75). Based on the ACR/EULAR criteria, the percentage of agreement was 83% (AUC 0.78) for ultrasonography and 81% (AUC 0.83) for biopsy. Sensitivity and specificity were 90% and 67%, respectively, for ultrasonography and 76% and 90% for biopsy. The results were similar with the AECG criteria. The intra- and inter-observer variability was good (κ > 0.7). Significant differences were observed for positive anti-Ro52 values and hypergammaglobulinemia in pathological ultrasound scans. CONCLUSION: Diagnostic ultrasonography is as useful as MSGB in pSS. Therefore, it could be included in the classification criteria. In this cohort, it proved more sensitive than MSGB and could be used as an initial test for patients suspected of having pSS. MSGB could be used in cases where clinical and serological results are inconclusive. Key Points • Major salivary gland ultrasonography adds diagnostic value similar to that of MSGB, thus potentially enabling this invasive procedure to be avoided. • Ultrasonography could be included in the classification criteria for primary Sjögren's syndrome. • Given that ultrasonography is more sensitive and less specific than MSGB, it could be used as an initial diagnostic test in patients with suspected Sjögren's syndrome. • Biopsy should be performed in those cases where ultrasonography, clinical, and serological data are inconclusive.

Dual targeted therapy in patients with psoriatic arthritis and spondyloarthritis: a real-world multicenter experience from Spain.

Dual targeted therapy (DTT) has emerged as a promising approach in patients with refractory spondyloarthritis (SpA) or psoriatic arthritis (PsA) and extra-musculoskeletal manifestations of both diseases, but its effectiveness/safety ratio still remains unclear. This is a retrospective, real-world multicenter study in refractory SpA and PsA patients with simultaneous use of two biological or synthetic targeted agents. Effectiveness was assessed using Ankylosing Spondylitis Disease Activity Score with C-reactive protein (ASDAS-CRP) and Disease Activity in Psoriatic Arthritis (DAPSA) Score. We identified 39 different DTT combinations in 36 patients (22 SpA; 14 PsA), 25 of them with concomitant inflammatory bowel disease. The most commonly used combinations were TNF inhibitor plus antagonist of the IL12/23 pathway, followed by TNF inhibitor plus IL-17 antagonist. During a median exposure of 14.86 months (IQR 8-20.2), DTT retention rate was 69.4% (n=25/36; 19 SpA, 6 PsA). Major clinical improvement (change in ASDAS-CRP > 2 or improvement > 85% in DAPSA) was achieved in 69.4% of patients (n=25/36 therapeutical combinations; 17/21 SpA, 8/15 PsA), with a 58.3% (n=21/36 combinations; 15/20 SpA, 6/13 PsA) low-activity/remission rate. Of the patients who were receiving glucocorticoids, 55% managed to withdraw them during follow-up. Interestingly, only four serious adverse events in three patients were observed, leading to DTT discontinuation.

Impact of genetic variants of ATP binding cassette B1, AICAR transformylase/IMP cyclohydrolase, folyl-polyglutamatesynthetase, and methylenetetrahydrofolatereductase on methotrexate toxicity. / Impacto de variantes genéticas del transportador de membrana que une ATP B1, la aicar transformilasa/IMP ciclohidrolasa, la folilpoliglutamatosintetasa y la metilen-tetrahidrofolatorreductasa en la toxicidad de metotrexato.

OBJECTIVE: To analyze the effect of single nucleotide polymorphisms (SNPs) with well-known functional impact of methylenetetrahydrofolatereductase (MTHFR; rs1801131 and rs1801133), the membrane transporter ABCB1 (rs1045642), the AICAR transformylase/IMP cyclohydrolase (ATIC; rs2372536) and folyl-polyglutamatesynthetase (FPGS; rs1544105), on liver and bone marrow toxicity of methotrexate (MTX). PATIENTS AND METHODS: We analyzed 1415 visits from 350 patients of the PEARL (Princesa Early Arthritis Register Longitudinal) study: (732 with MTX, 683 without MTX). The different SNPs were genotyped using specific TaqMan probes (Applied Biosystems). Multivariate analyzes were performed using generalized linear models in which the dependent variables were the levels of serum alanine aminotransferase (liver toxicity), leukocytes, platelets or hemoglobin (hematologic toxicity) and adjusted for clinical variables (disease activity, etc.), analytical (renal function, etc.), sociodemographic (age, sex, etc.) and genetic variants of MTHFR, ABCB1, ATIC and FPGS. The effect of these variables on the MTX doses prescribed throughout follow-up was also analyzed through multivariate analysis nested by visit and patient. RESULTS: When taking MTX, those patients carrying the CC genotype of rs1045642 in ABCB1 showed significantly higher GPT levels (7.1±2.0 U/L; P<.001). Carrying at least one G allele of rs1544105 in FPGS was associated with lower leukocyte (-0.67±0.32; 0.038), hemoglobin (-0.34±0.11g/dL; P=.002), and platelet (-11.8±4.7; P=.012) levels. The presence of the G allele of rs1544105 in FPGS, and the T allele of rs1801133 in MTHFR, was significantly associated with the use of lower doses of MTX. DISCUSSION: Our data suggest that genotyping functional variants in FGPS and MTHFR enzymes and the transporter ABCB1 could help to identify patients with increased risk of MTX toxicity.

HLA-DRB1 association with Henoch-Schonlein purpura.

Objective: Henoch-Schönlein purpura (HSP) is the most common vasculitis in children but it is not exceptional in adults. Increased familial occurrence supports a genetic predisposition for HSP. In this context, an association with the human leukocyte antigen-HLA-DRB1*01 phenotype has been suggested in Caucasian individuals with HSP. However, data on the potential association of HSP with HLA-DRB1*01 were based on small case series. To further investigate this issue, we performed HLA-DRB1 genotyping of the largest series of HSP patients ever assessed for genetic studies in Caucasians. Methods: 342 Spanish patients diagnosed with HSP fulfilling the American College of Rheumatology and the Michel et al classification criteria, and 303 sex and ethnically matched controls were assessed. HLA-DRB1 alleles were determined using a PCR-Sequence-Specific-Oligonucleotide Probe (PCR-SSOP) method. Results: A statistically significant increase of HLA-DRB1*01 in HSP patients when compared with controls was found (43% vs 7%, respectively; p<0.001; odds ratio-OR=2.03 [1.43-2.87]). It was due to the increased frequency of HLA-DRB1*0103 phenotype in HSP (14% vs 2%; p<0.001; OR=8.27 [3.46-23.9]). These results remained statistically significant after adjusting for Bonferroni correction. In contrast, a statistically significant decreased frequency of the HLA-DRB1*0301 phenotype was observed in patients compared to controls (5.6% vs 18.1%, respectively; p<0.001, OR=0.26 [0.14-0.47]), even after adjustment for Bonferroni correction. No HLA-DRB1 association with specific features of the disease was found. Conclusion: Our study confirms an association of HSP with HLA-DRB1*01 in Caucasians. Also, a protective effect against the development of HSP appears to exist in Caucasians carrying the HLA-DRB1*03 phenotype. This article is protected by copyright. All rights reserved.