Arthritis Research & Therapy最新文献

{"title":"Circ-CAMTA1 regulated by Ca2+ influx inhibited pyruvate carboxylase activity and modulate T cell function in patients with systemic lupus erythematosus","authors":"Hui-Chun Yu, Hsien-Yu Huang Tseng, Hsien-Bin Huang, Ming-Chi Lu","doi":"10.1186/s13075-024-03422-6","DOIUrl":"https://doi.org/10.1186/s13075-024-03422-6","url":null,"abstract":"To investigate the roles of Ca2+ influx-regulated circular RNAs (circRNAs) in T cells from patients with systemic lupus erythematosus (SLE). The expression profile of circRNAs in Jurkat cells, co-cultured with and without ionomycin, was analyzed by next-generation sequencing and validated using real-time polymerase chain reaction. The identified Ca2+ influx-regulated circRNAs were further examined in T cells from 42 patients with SLE and 23 healthy controls. The biological function of specific circRNA was investigated using transfection and RNA pull-down assay. After validation, we confirmed that the expression levels of circ-ERCC4, circ-NFATC2, circ-MYH10, circ-CAMTA1, circ-ASH1L, circ-SOCS7, and circ-ASAP1 were consistently increased in Jurkat cells following Ca2+ influx. The expression levels of circ-CAMTA1, circ-ASH1L, and circ-ASAP1 were significantly lower in T cells from patients with SLE, with even lower levels observed in those with higher disease activity. Interferon (IFN)-α was found to suppress the expression of circ-CAMTA1. Circ-CAMTA1 bound to pyruvate carboxylase and inhibited its biological activity. Overexpression of circ-CAMTA1, but not its linear form, significantly decreased extracellular glucose levels. Furthermore, increased expression of circ-CAMTA1, but not its linear form, decreased miR-181c-5p expression, resulting increased IL-2 secretion. Three Ca2+ influx-regulated circ-RNAs—circ-CAMTA1, circ-ASH1L, and circ-ASAP1 —were significantly reduced in T cells from patients with SLE and associated with disease activity. IFN-α suppressed the expression of circ-CAMTA1, which interacted with pyruvate carboxylase, inhibited its activity, affected glucose metabolism, and increased IL-2 secretion. These findings suggest that circ-CAMTA1 regulated by Ca²⁺ influx modulated T cell function in patients with SLE.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"11 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Increased serum level of IL-6 predicts poor prognosis in anti-MDA5-positive dermatomyositis with rapidly progressive interstitial lung disease","authors":"Yuanyuan Niu, Suling Liu, Qian Qiu, Di Fu, Youjun Xiao, Liuqin Liang, Yang Cui, Shanhui Ye, Hanshi Xu","doi":"10.1186/s13075-024-03415-5","DOIUrl":"https://doi.org/10.1186/s13075-024-03415-5","url":null,"abstract":"Anti-melanoma differentiation-associated protein 5 antibody-positive dermatomyositis (anti-MDA5-positvie DM) is a subtype of dermatomyositis with a poor prognosis, characterized by rapidly progressive interstitial lung disease (RP-ILD). The study aims to investigate the significance of serum cytokines profiles and peripheral lymphocytes in predicting prognoses of anti-MDA5-positvie DM with RP-ILD. Furthermore, it seeks to analyze longitudinal data of lymphocytes during hospitalization to identify distinct trajectories and cluster patients accordingly. A total of 168 patients with anti-MDA5-positive DM were enrolled in this retrospective study from two cohorts. Univariate and multivariate Cox regression analyses were conducted to determine the predictors of 6-month all-cause mortality and RP-ILD. Group-based trajectory modeling (GBTM) was employed to model the trajectories of longitudinal peripheral lymphocytes. In the multivariate Cox regression analysis, IL-6 ≥ 13.41pg/mL, lymphocytes < 0.5 × 109 /L, lymphocytes from 0.5 to 1.0 × 109 /L, older age, and elevated LDH were identified as independent predictors of 6-month all-cause mortality. Furthermore, IL-6 ≥ 13.41pg/mL, lymphocytes < 0.5 × 109 /L, and lymphocytes from 0.5 to 1.0 × 109 /L were found to be independent predictors of RP-ILD. Additionally, three trajectory groups of lymphocytes within the first week after admission were established based on GBTM. These groups included: Group 1, with low-level of lymphocytes that declined; Group 2, with medium-level of lymphocytes that slightly rose; and Group 3, with high-level of lymphocytes that rose. Notably, group 1 showed the highest mortality (90.7%) and all experiencing RP-ILD. Increased expression of IL-6 in lung tissues was observed in two cases with RP-ILD compared to two cases without RP-ILD. We also found the increased infiltration of CD4 + and CD8 + T cells, particularly CD8 + T cells, in lung tissues from patients with RP-ILD. Our study demonstrated that increased level of serum IL-6 (≥ 13.41pg/mL) and severe lymphopenia were promising predictors of 6-month all-cause mortality and the occurrence of RP-ILD in anti-MDA5-positive DM patients. Furthermore, tracking distinct trajectories of lymphocytes during hospitalization can be utilized to cluster patients.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"12 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Long-term outcome of autologous haematopoietic stem cell transplantation in patients with systemic sclerosis: a comparison with patients treated with rituximab and with traditional immunosuppressive agents","authors":"Nicoletta Del Papa, Silvia Cavalli, Andrea Rindone, Francesco Onida, Giorgia Saporiti, Antonina Minniti, Maria Rosa Pellico, Claudia Iannone, Giorgia Trignani, Nicoletta D’Angelo, Manuel Sette, Raffaella Greco, Claudio Vitali, Roberto Caporali","doi":"10.1186/s13075-024-03408-4","DOIUrl":"https://doi.org/10.1186/s13075-024-03408-4","url":null,"abstract":"Autologous haematopoietic stem cell transplantation (AHSCT) is more effective than conventional immunosuppressive therapies (CIT) in improving the outcome of patients with rapidly progressive diffuse cutaneous systemic sclerosis (dcSSc). So far, there is still a paucity of data comparing AHSCT with rituximab (RTX). Aim of the study is to retrospectively compare, in patients with dcSSc, the effectiveness of AHSCT with that of RTX and CIT. Thirty-five dcSSc AHSCT-treated patients were compared with 29 and 36 matched cases treated with RTX and CIT, respectively. The patients were followed up for 5 years by assessing selected outcome measures every year. Overall survival, modified Rodnan skin score (mRSS), lung function tests (FVC and DLCO), and the revised EUSTAR Activity Index (REAI) were the outcome measures chosen to evaluate the therapy efficacy. AHSCT was significantly more effective than RTX and CIT in prolonging survival, inducing a rapid reduction of the mRSS and REAI and maintaining the baseline level of lung function tests for a longer time. RTX therapy was also superior to CIT in reducing REAI, mRSS and in saving lung function. AHSCT is more effective than both RTX and CIT in prolonging survival and inducing prolonged remission in patients with rapidly progressive dcSSc.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"62 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142487218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"WIF-1 contributes to lupus-induced neuropsychological deficits via the CRYAB/STAT4-SHH axis","authors":"Liping Tan, Yu Fan, Xinyi Xu, Tianshu Zhang, Xiangyu Cao, Chenghao Zhang, Jun Liang, Yayi Hou, Huan Dou","doi":"10.1186/s13075-024-03420-8","DOIUrl":"https://doi.org/10.1186/s13075-024-03420-8","url":null,"abstract":"Neuropsychiatric systemic lupus erythematosus (NPSLE) often manifests as cognitive deterioration, with activated microglia and blood-brain barrier (BBB) disruption implicated in these neurological complications. Wnt-inhibitory factor-1 (WIF-1), a secreted protein, has been detected in the cerebrospinal fluid (CSF) of NPSLE patients. However, the contribution of WIF-1 in contributing to lupus cognitive impairment remains poorly understood. Using MRL/MpJ-Faslpr (MRL/lpr) lupus-prone mice and TLR7 agonist imiquimod (IMQ)-induced lupus mice, recombinant WIF-1 protein (rWIF-1) and adeno-associated virus (AAV) encoding sh-WIF-1 were administered via intracerebroventricular injection. Behavioral tests, histopathological examinations, flow cytometry, and molecular biology techniques were employed to investigate the underlying mechanisms. Microinjection of rWIF-1 exacerbated cognitive deficits and mood abnormalities, increased BBB leakage and neuronal degeneration, and caused aberrant activation of microglia and synaptic pruning in the hippocampus. Conversely, lupus mice injected with AAV-shWIF-1 exhibited significant remission. In vitro, rWIF-1 induced overactivation of microglia with an increased CD86+ pro-inflammatory subpopulation, upregulated phagocytic activity, and excessive synaptic engulfment, contributing to increased BBB permeability. Furthermore, WIF-1 exerted its biological effects through the CRYAB/STAT4 pathway, transcriptionally decreasing SHH production. We also identified that symmetric dimethylarginine (SDMA) could alleviate rWIF-1-induced microglial activation and BBB damage, thereby restoring SHH levels. In conclusion, WIF-1 exacerbates lupus-induced cognitive dysfunction in mice by triggering aberrant microglial activation and BBB disruption through the CRYAB/STAT4-SHH axis, highlighting the potential therapeutic effects of SDMA for the treatment of NPSLE.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"60 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142487575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxysterols contribute to immune cell recruitment in SLE skin lesions","authors":"Xiaoyun Chen, Lianlian Ouyang, Sujie Jia, Ming Zhao","doi":"10.1186/s13075-024-03414-6","DOIUrl":"https://doi.org/10.1186/s13075-024-03414-6","url":null,"abstract":"Abnormal oxysterol metabolism has been observed in the peripheral blood of SLE patients, but its role in systemic lupus erythematosus (SLE) skin lesions remains unclear. Targeted oxidized lipid metabolomics analysis using liquid chromatography-mass spectrometry (LC-MS) was performed to quantify oxysterols in SLE skin lesions. Immunohistochemical staining and single-cell sequencing data analysis confirmed the upregulation of oxysterol-encoding enzymes CH25H and CYP7B1. The impact on fibroblast-mediated PBMCs chemotaxis was assessed using a transwell chamber. We identified aberrant oxidized cholesterol metabolism in SLE skin lesions, characterized by elevated levels of 7-ketocholesterol, 5α-6α-cholestane-3β,5α,6β-triol, and so on. Fibroblasts were the primary cells expressing oxysterol-encoding genes, with CH25H and CYP7B1 expression upregulated via the IL-1β-mediated p38 MAPK and NFκB pathways. Notably, IL-1β-stimulated fibroblasts demonstrated enhanced PBMCs recruitment, which was attenuated by a GPR183 inhibitor. Our findings reveal a potential mechanism by which fibroblasts contribute to immune cell recruitment in SLE skin lesions by expression of CH25H and CYP7B1. This study underscores the significance of oxysterol metabolism in SLE skin lesion pathogenesis and highlights potential therapeutic targets for SLE skin lesion treatment. • SLE skin lesions show abnormal oxysterol metabolism, with fibroblasts being the main source of increased CH25H and CYP7B1 genes. • IL-1β-mediated p38 MAPK and NFκB pathways implicated in CH25H and CYP7B1 upregulation. • Enhanced PBMCs recruitment by IL-1β-stimulated fibroblasts can be attenuated by a GPR183 inhibitor, offering potential SLE skin lesion treatment.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"44 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142486703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predictive biomarkers for low-dose IL-2 therapy efficacy in systemic lupus erythematosus: a clinical analysis","authors":"Ruiling Feng, Xian Xiao, Bo Huang, Kai Zhang, Xia Zhang, Zhanguo Li, Yuan Jia, Jing He","doi":"10.1186/s13075-024-03388-5","DOIUrl":"https://doi.org/10.1186/s13075-024-03388-5","url":null,"abstract":"Low-dose IL-2 (Ld-IL2) has shown favorable therapeutic effects in systemic lupus erythematosus (SLE) therapy. However, previous clinical trials reported an SLE Responder Index-4 (SRI-4) response rate of 65.52%-68%, with approximately half failing to achieve the primary endpoint by week 24. Our study aims to determine the real-world use of Ld-IL2 and to identify determinants of its effectiveness in SLE. We pooled data from 342 SLE patients undergoing sequential Ld-IL2 treatment, with 314 persisting for over 3 months were included in effectiveness and prediction analyses. All patients were categorized into responder (n = 136) and non-responder group (n = 178) according to SRI-4. Lupus Low Disease Activity State (LLDAS) was also analyzed to validate our results. Rash, lower complement 3 (C3), and renal involvement including urine protein, urine occult blood and urine casts emerged as prominent predictors of achieving SRI-4. Adjusting for baseline values using the ratio of change to baseline revealed significant differences in CD4 + T cell immune profiles between responders and non-responders. ROC analysis confirmed a satisfactory performance of rash, renal involvement, percentage change of CD4 + T cells, and C3 in predicting SRI-4, yielding an AUC of 0.933. LLDAS analysis showed that hematological involvements and lower CLA + Treg were potent predictive markers in LLDAS attainment. Conversely, renal involvement failed to have significant association in achieving LLDAS. The analysis of background therapy in SLE patients showed that MMF was more likely to reach the SRI-4 response with the combination of Ld-IL2. These findings uncovered the predictors of Ld-IL2 treatment efficacy in SLE patients and provided guidance to physicians for rational utilization.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"13 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142486649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cardiovascular health metrics and all-cause mortality in osteoarthritis, inflammatory arthritis, and unclassified arthritis patients: a national prospective cohort study","authors":"Yu Zhu, Yang-Zhen Wang, Yi-tian Chen, Jie Guo, Zhen-Zhong Wang","doi":"10.1186/s13075-024-03410-w","DOIUrl":"https://doi.org/10.1186/s13075-024-03410-w","url":null,"abstract":"Arthritis notably elevates mortality risk. It remains unclear whether the cardiovascular health (CVH) metrics improves the risk of all-cause mortality in patients with all types of arthritis. This study data from the National Health and Nutrition Examination Survey to probe the link between CVH and all-cause mortality among arthritis sufferers in the United States. CVH evaluation employed the Life's Essential 8 metrics. Mortality outcomes were scrutinized using Cox proportional hazard regression models. Additionally, a restricted cubic spline analysis delineated the linear relationship between CVH and mortality. The study also delved into the singular impact of each CVH component on mortality. In the cohort of 5919 patients with arthritis, improved CVH was linked to lower all-cause mortality. Specifically, each 10-point increment in CVH score was associated with a substantial decline in all-cause mortality risk [unadjusted hazard ratio (HR): 0.77, 95% Confidence Interval (95% CI): 0.71–0.83, P < 0.001]. Adjustments for age, sex, race, and social determinants of health further refined the HR to 0.72 (95% CI: 0.67–0.79, P < 0.001). Higher versus lower CVH scores at baseline markedly reduced mortality risk, with the most substantial decrease seen in those with ideal CVH metrics (HR: 0.39, 95% CI: 0.26–0.59, P < 0.001). Similar results were not observed in patients with inflammatory arthritis, but were seen in those with osteoarthritis or degenerative arthritis, and unknown types of arthritis. Ideal CVH substantially decreases all-cause mortality risk among patients with arthritis, confirming the critical role of CVH in arthritis management. This study advocates for CVH interventions as part of comprehensive arthritis treatment plans.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"65 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142440255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Depressive symptoms are associated with fatigue, poorer functional status and less engagement in sports in axSpA and PsA: an analysis from the RABBIT-SpA cohort","authors":"Andreas Reich, Anja Weiß, Lisa Lindner, Xenofon Baraliakos, Denis Poddubnyy, Silke Zinke, Carsten Stille, Anja Strangfeld, Anne C. Regierer","doi":"10.1186/s13075-024-03411-9","DOIUrl":"https://doi.org/10.1186/s13075-024-03411-9","url":null,"abstract":"&lt;p&gt;&lt;b&gt;Correction: Arthritis Res Ther 25, 136 (2023)&lt;/b&gt;&lt;/p&gt;&lt;p&gt;&lt;b&gt;https://doi.org/10.1186/s13075-023-03127-2&lt;/b&gt;.&lt;/p&gt;&lt;p&gt;Following publication of the original article [1], the authors reported an error under the Abstract, Result sub-section.&lt;/p&gt;&lt;p&gt;The sentence currently reads:&lt;/p&gt;&lt;p&gt;In both diagnoses, the proportion of patients with moderate depressive symptoms was 8% and 21% with severe symptoms.&lt;/p&gt;&lt;p&gt;The sentence should read:&lt;/p&gt;&lt;p&gt;In both diagnoses, 21% of patients exhibited moderate and 8% severe depressive symptoms.&lt;/p&gt;&lt;ol data-track-component=\"outbound reference\" data-track-context=\"references section\"&gt;&lt;li data-counter=\"1.\"&gt;&lt;p&gt;Reich A, Weiß A, Lindner L, et al. Depressive symptoms are associated with fatigue, poorer functional status and less engagement in sports in axSpA and PsA: an analysis from the RABBIT-SpA cohort. Arthritis Res Ther. 2023;25(1):136. https://doi.org/10.1186/s13075-023-03127-2.&lt;/p&gt;&lt;p&gt;Article PubMed PubMed Central Google Scholar &lt;/p&gt;&lt;/li&gt;&lt;/ol&gt;&lt;p&gt;Download references&lt;svg aria-hidden=\"true\" focusable=\"false\" height=\"16\" role=\"img\" width=\"16\"&gt;&lt;use xlink:href=\"#icon-eds-i-download-medium\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"&gt;&lt;/use&gt;&lt;/svg&gt;&lt;/p&gt;&lt;h3&gt;Authors and Affiliations&lt;/h3&gt;&lt;ol&gt;&lt;li&gt;&lt;p&gt;German Rheumatism Research Center (DRFZ Berlin), Epidemiology and Health Services Research, Berlin, Germany&lt;/p&gt;&lt;p&gt;Andreas Reich, Anja Weiß, Lisa Lindner, Denis Poddubnyy, Anja Strangfeld &amp; Anne C. Regierer&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Ruhr University Bochum, Bochum, Germany&lt;/p&gt;&lt;p&gt;Xenofon Baraliakos&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Rheumazentrum Ruhrgebiet, Herne, Germany&lt;/p&gt;&lt;p&gt;Xenofon Baraliakos&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Charité – Universitätsmedizin Berlin, Department of Gastroenterology, Infectiology and Rheumatology, Berlin, Germany&lt;/p&gt;&lt;p&gt;Denis Poddubnyy&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Berlin, Germany&lt;/p&gt;&lt;p&gt;Silke Zinke&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Hannover, Germany&lt;/p&gt;&lt;p&gt;Carsten Stille&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;p&gt;Charité – Universitätsmedizin Berlin, Berlin, Germany&lt;/p&gt;&lt;p&gt;Anja Strangfeld&lt;/p&gt;&lt;/li&gt;&lt;/ol&gt;&lt;span&gt;Authors&lt;/span&gt;&lt;ol&gt;&lt;li&gt;&lt;span&gt;Andreas Reich&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Anja Weiß&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Lisa Lindner&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Xenofon Baraliakos&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Denis Poddubnyy&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Silke Zinke&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;PubMed&lt;span&gt; &lt;/span&gt;Google Scholar&lt;/span&gt;&lt;/p&gt;&lt;/li&gt;&lt;li&gt;&lt;span&gt;Carsten Stille&lt;/span&gt;View author publications&lt;p&gt;You can also search for this author in &lt;span&gt;","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"3 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methotrexate promotes the release of granulocyte–macrophage colony-stimulating factor from rheumatoid arthritis fibroblast-like synoviocytes via autocrine interleukin-1 signaling","authors":"Beatrice Bergström, Tilia Selldén, Miriam Bollmann, Mattias N. D. Svensson, Anna-Karin Hultgård Ekwall","doi":"10.1186/s13075-024-03406-6","DOIUrl":"https://doi.org/10.1186/s13075-024-03406-6","url":null,"abstract":"Activated fibroblast-like synoviocytes (FLS) are drivers of synovitis and structural joint damage in rheumatoid arthritis (RA). Despite the use of disease-modifying drugs, only about 50% of RA patients reach remission in real-world settings. We used an unbiased approach to investigate the effects of standard-of-care methotrexate (MTX) and a Janus kinase inhibitor, tofacitinib (TOFA), on gene expression in RA-FLS, in order to identify untargeted disease mediators. Primary RA-FLS were activated by stimulation with interleukin-1β (IL-1β) or platelet-derived growth factor + IL-1β in the presence or absence of MTX or TOFA, with or without additional inhibitors. Co-cultures of synovial cells were performed in direct and indirect systems. Cells were collected for RNA sequencing or qPCR, and supernatants were analyzed for protein concentrations. Six thousand three hundred fifty genes were differentially expressed, the majority being upregulated, in MTX-treated activated RA-FLS and 970 genes, the majority being downregulated, in TOFA-treated samples. Pathway analysis showed that MTX had largest effects on ‘Molecular mechanisms of cancer’ and TOFA on ‘Interferon signaling’. Targeted analysis of disease-associated genes revealed that MTX increased the expression of cell cycle-regulating genes but also of pro-inflammatory mediators like IL-1α (IL1A) and granulocyte–macrophage colony-stimulating factor, GM-CSF (CSF2). The MTX-promoted expression of CSF2 in activated RA-FLS peaked at 48 h, could be mediated via either NF-κB or AP-1 transcription factors, and was abrogated by IL-1 inhibitors (IRAK4 inhibitor and anakinra). In a co-culture setting, MTX-treatment of activated RA-FLS induced IL1B expression in macrophages. MTX treatment induces secretion of IL-1 from activated RA-FLS which by autocrine signaling augments their release of GM-CSF. This unexpected effect of MTX might contribute to the persistence of synovitis.\u0000","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"2 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142405220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes and associations between synovial fluid and magnetic resonance imaging markers of osteoarthritis after high tibial osteotomy","authors":"Jenna M. Schulz, Trevor B. Birmingham, Holly T. Philpott, C. Thomas Appleton, Hayden F. Atkinson, J. Robert Giffin, Frank Beier","doi":"10.1186/s13075-024-03409-3","DOIUrl":"https://doi.org/10.1186/s13075-024-03409-3","url":null,"abstract":"Mechanobiological mechanisms of osteoarthritis (OA) are unclear. Our objectives were to explore: 1) changes in knee joint physiology using a large panel of synovial fluid biomarkers from before to one year after high tibial osteotomy (HTO) surgery, and 2) the association of changes in the synovial fluid biomarkers with the changes in MRI measures of knee effusion-synovitis and articular cartilage composition. Twenty-six patients with symptomatic knee OA and varus alignment underwent synovial fluid aspirations and 3 T MRI before and one year after medial opening wedge HTO. Cytokine and growth factor levels in synovial fluid were measured with multiplex assays. Ontology and pathway enrichment was assessed using data protein sets with gene set enrichment analysis (GSEA), and analyzed using linear mixed effects models. MRIs were analyzed for effusion-synovitis and T2 cartilage relaxation time using manual segmentations. Changes in biomarker concentrations were correlated to changes in MRI effusion-synovitis volume and articular cartilage T2 relaxation times. Decreased enrichment in Toll-like receptor and TNF-α signalling was detected one year after HTO. The leading contributors to this reduction included IL-6, TNF-α and IL-1β, whereas the highest contributors to positive enrichment were EGF, PDGF-BB and FGF-2. Effusion-synovitis volume decreased (mean [95%CI]) one year after HTO (-2811.58 [-5094.40, -528.76mm3]). Effusion-synovitis volume was moderately correlated (r [95% CI]) with decreased MMP-1 (0.44 [0.05; 0.71]), IL-7 (0.41 [0.00; 0.69]) and IL-1β (0.59 [0.25; 0.80]) and increased MIP-1β (0.47 [0.10; 0.73]). Medial tibiofemoral articular cartilage T2 relaxation time decreased (mean [95% CI]) one year after HTO (-0.33 [-2.69; 2.05]ms). Decreased T2 relaxation time was moderately correlated to decreased Flt-3L (0.61 [0.28; 0.81]), IL-10 (0.47 [0.09; 0.73]), IP-10 (0.42; 0.03–0.70) and increased MMP-9 (-0.41 [-0.7; -0.03]) and IL-18 (-0.48 [-0.73; -0.10]). Decreased aberrant knee mechanical loading in patients with OA is associated with decreased biological and imaging measures of inflammation (measured in synovial fluid and on MRI) and increased anabolic processes. These exploratory findings suggest that improvement in knee loading can produce long-term (one year) improvement in joint physiology.","PeriodicalId":8419,"journal":{"name":"Arthritis Research & Therapy","volume":"70 1","pages":""},"PeriodicalIF":4.9,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}