Immunoprecipitated proteins using serum pools of patients with juvenile idiopathic arthritis
Ontology highlight
ABSTRACT:
INSTRUMENT(S):
ORGANISM(S): Homo Sapiens (human)
TISSUE(S): Epithelial Cell, Cell Culture
DISEASE(S): Juvenile Rheumatoid Arthritis
SUBMITTER: 
Charlotte Welinder
LAB HEAD: Robin Kahn
PROVIDER: PXD038570 | Pride | 2023-01-05
REPOSITORIES: Pride
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| AM_1.mzML | Mzml | |||
| AM_1.mzTab | Mztab | |||
| AM_1.mzid | Mzid | |||
| AM_1.raw | Raw | |||
| AM_10.mzML | Mzml |
Items per page: 5 1 - 5 of 24 |
Similar Datasets
Project description:The islet amyloid polypeptide (IAPP), a pancreas-produced peptide, has beneficial functions in its monomeric form. However, IAPP aggregates, related to type 2 diabetes mellitus (T2DM), are toxic not only for the pancreas, but also for the brain. In the latter, IAPP is often found in vessels, where it is highly toxic for pericytes, cells that have contractile properties and regulate capillary blood flow. The aim of this study is to assess whether IAPP oligomers alter the morphology and contractility of pericytes using an in vitro brain vasculature model and evaluate the association between IAPP and capillary contraction in human brain tissue.
2023-03-11 | PXD035048 | Pride
Project description:Introduction: In chronic and treatment-resistant cases of juvenile idiopathic arthritis-associated uveitis (JIAU), alterations of the iris vasculature may be observed clinically. We sought to investigate this phenomenon by combining clinical and laboratory analyses. Methods: Iris tissue (IT), aqueous humor (AH) and serum samples from patients with clinically inactive JIAU (n=30) or acute anterior uveitis (AAU; n=18), and primary open angle glaucoma (POAG; n=20) were obtained during ocular surgery. Samples were analyzed by RNA-sequencing (RNA-Seq), qRT-PCR, liquid chromatography, high–definition mass spectrometry technique (LC-MS), Western-Blot (WB), and LEGENDplex analysis. Pattern of iris vasculature in JIAU patients was assessed qualitatively via fluorescein and indocyanine green angiography (FLA/ICGA). Results: RNA-Seq of IT showed significantly differential expression (DE) of 136 genes between JIAU and POAG, of which 15 were associated with angiogenesis. qRT-PCR, performed to validate RNA-Seq results, showed significant upregulation of the angiogenesis-related genes Kdr, Angpt-1, Tie-1, Tie-2 and Mmrn2 in IT (JIAU vs POAG). LC-MS of IT revealed a total number of 56 DE proteins (JIAU vs POAG), of which asporin, lumican and decorin were associated with angiogenesis and showed increased (p>0.05) expression on WB analysis. LEGENDplex analysis showed upregulation of ANGPT-2 in AH from JIAU compared to AAU and POAG, whereas VEGF was upregulated in AAU. Iris vascular leakage, hypoperfusion and neovascularization were observed by FLA/ICGA in JIAU patients with treatment-refractory complicated course of uveitis. Conclusion: Angiogenesis-related genes and proteins are upregulated in the iris tissue of JIAU patients, correlating with increased vascular permeability, hypoperfusion, and neovascularization of the anterior uveal tissue in chronic and complicated JIAU.
2021-04-09 | GSE171745 | GEO
Project description:Experimental autoimmune uveitis (EAU) in Lewis rats is a model for the clinical heterogeneity of human uveitis. The autoantigens inducing disease in the rat are also seen in human disease. Depending upon the specific autoantigen used, the experimental disease course can be either monophasic or relapsing/remitting and appears to be dictated by the T cell effector phenotype elicited. We investigated potential differences between monophasic and relapsing/remitting effector T cells using transcriptomic profiling and pathway analysis. RNA samples isolated from three independent T cell lines derived from each specificity where analyzed by microarrays. Microarray data was used to obtain transcriptomic changes reflecting signal transduction pathway dysregulation. Keywords: Two group comparison Comparison of two types of cell lines of two different antigen specificities.
2010-12-01 | E-GEOD-19652 | biostudies-arrayexpress
Project description:We report that CMV2b exist in a complex of sRNAs in arabidopsis, with significant preference to repeat-associated AGO4-related 24nt siRNAs. This differential selection of siRNAs in vivo helps CMV 2b to perturb host epigenetic defense in the form of transposons activation and severeal repeat associated loci hypomethylation. Examination of CMV 2b presence in sRNAs complex in vivo
2013-01-18 | E-GEOD-23771 | biostudies-arrayexpress
Project description:Experimental autoimmune uveitis (EAU) in Lewis rats is a model for the clinical heterogeneity of human uveitis. The autoantigens inducing disease in the rat are also seen in human disease. Depending upon the specific autoantigen used, the experimental disease course can be either monophasic or relapsing/remitting and appears to be dictated by the T cell effector phenotype elicited. We investigated potential differences between monophasic and relapsing/remitting effector T cells using transcriptomic profiling and pathway analysis. RNA samples isolated from three independent T cell lines derived from each specificity where analyzed by microarrays. Microarray data was used to obtain transcriptomic changes reflecting signal transduction pathway dysregulation. Keywords: Two group comparison
2010-12-01 | GSE19652 | GEO
Project description:Analysis of neutrophil proteomic alterations induced by migration towards inflamed joints in juvenile idiopathic arthritis (JIA). In this experiment neutrophil proteomes were investigated after migration towards JIA synovial fluid in an in vitro model of a synovial membrane, compared to neutrophils incubated in synovial fluid without migration. The migration model consisted of transwell inserts with human knee synoviocytes on the undersides and HMEC endothelial cells on the insides, placed in wells containing medium with 10 % JIA synovial fluid.
2022-02-15 | PXD029129 | Pride
Project description:Rationale: The diagnosis of idiopathic pulmonary fibrosis (IPF) requires exclusion of an underlying autoimmune disease, as present in interstitial lung diseases associated with connective tissue diseases (CTD-ILD). The prevalence of autoantibodies in IPF patients is currently unknown. Objectives: An unbiased assay for de novo discovery of autoantigens can help characterizing autoreactivities in IPF patients beyond clinically established autoimmune panels. Methods: We developed the proteomic Differential Antigen Capture (DAC) assay, capturing patient antibodies from plasma, followed by affinity purification coupled to mass spectrometry (AP-MS). The DAC assay quantifies the binding capacity of patient antibodies to proteins in a pooled native extract from lung explants (ILD explants n=41; donor controls n=12). Plasma antibodies from patients with IPF (n=35), CTD-ILD (n=24) and age-matched controls (n=32) were analyzed and validated in an independent cohort (IPF: n=40; CTD-ILD: n=20). Plasma antibody binding profiles were associated with clinical meta-data including diagnosis, lung function and transplant free survival. Measurements and Main Results: We identified 586 putative autoantigens in both study cohorts with a broad heterogeneity among disease entities and cohorts. On average, in IPF a mean±SD of 16±40 autoantigens and in CTD-ILD a mean±SD of 9±15 autoantigens were identified per patient. We identified 18 IPF-specific autoantigens validated in the second cohort. Interestingly, there was also a high number of shared autoantigens in IPF and CTD-ILD patients, with 17 being present in IPF and CTD-ILD of both cohorts. Presence of antibodies to Thrombospondin 1 (THBS1) and tubulin beta-1 chain (TUBB1) was associated with a significantly reduced survival in patients with IPF (p=0.002 and p=0.019, respectively). This signature was often associated with autoreactivity against talin-1 (TLN1), latent-transforming growth factor beta-binding protein 1 (LTBP1), epididymis secretory protein Li 112 (HEL-S-112), zyxin (ZYX), the LIM and senescent cell antigen-like-containing domain protein 1 (LIMS1) and caldesmon (CALD1). Conclusions: Unbiased proteomic profiling reveals that the overall prevalence of autoantibodies is similar in IPF and CTD-ILD patients and identifies novel IPF specific autoantigens associated with patient survival.
2021-02-22 | PXD024113 | Pride
Project description:Rationale: The diagnosis of idiopathic pulmonary fibrosis (IPF) requires exclusion of an underlying autoimmune disease, as present in interstitial lung diseases associated with connective tissue diseases (CTD-ILD). The prevalence of autoantibodies in IPF patients is currently unknown. Objectives: An unbiased assay for de novo discovery of autoantigens can help characterizing autoreactivities in IPF patients beyond clinically established autoimmune panels. Methods: We developed the proteomic Differential Antigen Capture (DAC) assay, capturing patient antibodies from plasma, followed by affinity purification coupled to mass spectrometry (AP-MS). The DAC assay quantifies the binding capacity of patient antibodies to proteins in a pooled native extract from lung explants (ILD explants n=41; donor controls n=12). Plasma antibodies from patients with IPF (n=35), CTD-ILD (n=24) and age-matched controls (n=32) were analyzed and validated in an independent cohort (IPF: n=40; CTD-ILD: n=20). Plasma antibody binding profiles were associated with clinical meta-data including diagnosis, lung function and transplant free survival. Measurements and Main Results: We identified 586 putative autoantigens in both study cohorts with a broad heterogeneity among disease entities and cohorts. On average, in IPF a mean±SD of 16±40 autoantigens and in CTD-ILD a mean±SD of 9±15 autoantigens were identified per patient. We identified 18 IPF-specific autoantigens validated in the second cohort. Interestingly, there was also a high number of shared autoantigens in IPF and CTD-ILD patients, with 17 being present in IPF and CTD-ILD of both cohorts. Presence of antibodies to Thrombospondin 1 (THBS1) and tubulin beta-1 chain (TUBB1) was associated with a significantly reduced survival in patients with IPF (p=0.002 and p=0.019, respectively). This signature was often associated with autoreactivity against talin-1 (TLN1), latent-transforming growth factor beta-binding protein 1 (LTBP1), epididymis secretory protein Li 112 (HEL-S-112), zyxin (ZYX), the LIM and senescent cell antigen-like-containing domain protein 1 (LIMS1) and caldesmon (CALD1). Conclusions: Unbiased proteomic profiling reveals that the overall prevalence of autoantibodies is similar in IPF and CTD-ILD patients and identifies novel IPF specific autoantigens associated with patient survival.
2021-02-22 | PXD024123 | Pride
Project description:Juvenile idiopathic arthritis (JIA) is the most common rheumatic disease of childhood, with JIA-associated uveitis its most common extra-articular manifestation. JIA-associated uveitis is a potentially sight-threatening condition and thus carries a considerable risk of morbidity. The aetiology of the condition is autoimmune in nature with the predominant involvement of CD4(+) T cells. However, the underlying pathogenic mechanisms remain unclear, particularly regarding interplay between genetic and environmental factors. JIA-associated uveitis comes in several forms, but the most common presentation is of the chronic anterior uveitis type. This condition is usually asymptomatic and thus screening for JIA-associated uveitis in at-risk patients is paramount. Early detection and treatment aims to stop inflammation and prevent the development of complications leading to visual loss, which can occur due to both active disease and burden of disease treatment. Visually disabling complications of JIA-associated uveitis include cataracts, glaucoma, band keratopathy and macular oedema. There is a growing body of evidence for the early introduction of systemic immunosuppressive therapies in order to reduce topical and systemic glucocorticoid use. This includes more traditional treatments, such as methotrexate, as well as newer biological therapies. This review highlights the epidemiology of JIA-associated uveitis, the underlying pathogenesis and how affected patients may present. The current guidelines and criteria for screening, diagnosis and monitoring are discussed along with approaches to management.
| S-EPMC4848803 | biostudies-other
Project description:To describe recent evidence from the literature pertaining to juvenile idiopathic arthritis (JIA)-associated uveitis.Uveitis is most common in extended oligoarticular JIA. A significant number of patients already have ocular complications at time of diagnosis of uveitis. Risk factors for complications include either abnormally high or low intraocular pressure, posterior synechiae, male sex, temporal proximity to diagnosis of arthritis and topical corticosteroid use. Use of immunosuppressive agents significantly reduces ocular complications. Aggressive perioperative control of intraocular inflammation is necessary for successful cataract surgery with lens implantation. Controlled clinical trials are under way to assess the efficacy of biologic agents in JIA-associated uveitis. Long-term safety, however, is still unknown.JIA-associated uveitis carries significant ocular morbidity that lasts well into adulthood. Treatment with immunosuppressive agents can reduce the risk of ocular complications. Biologic agents hold promise in the treatment of JIA-associated uveitis, but require long-term data to assess their safety.
| S-EPMC3089768 | biostudies-literature