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ChIP-seq in neutrophils from Juvenile Idiopathic Arthritis

ABSTRACT: We used chromatin immunoprecipitation-sequencing to identify epigenetic marks associated with enhancer function (H3K4me1 and H3K27ac) from two children with untreated active JIA (ADU) and three children who were undergoing therapy with methotrexate but whose disease still remained active (ADT).

ORGANISM(S): Homo sapiens

PROVIDER: GSE92393 | GEO | 2019/09/28

REPOSITORIES: GEO

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RNA-seq in neutrophils from Juvenile Idiopathic Arthritis

Project description:In this study, we explored transcriptional complexity in human neutrophils from juvenile idiopathis arthritis and healthy control. We obtained differentially expressed genes among 3 ADU (active disease, untreated), 3 ADT (active disease, treated) and 2 HC (healthy control) samples using Cuffdiff2 software.

2017-06-13 | GSE92293 | GEO

Modeling Transcriptional Rewiring in Neutrophils through the Course of Treated Juvenile Idiopathic Arthritis

Project description:Neutrophils in children with the polyarticular form of juvenile idiopathic arthritis (JIA) display abnormal transcriptional patterns linked to fundamental metabolic derangements. These abnormalities include re-ordering of miRNA-RNA expression networks. In this study, we sought to determine the effects of therapy on miRNA-RNA networks in polyarticular JIA. We studied children with active JIA disease on therapy (ADM), children with inactive disease also on therapy (ID), and children with clinical remission on medication (CRM) using exon and miRNA microarrays and compared results to findings from healthy control (HC) children. We found substantial re-ordering of miRNA-RNA networks after the initiation of therapy. Each disease state was associated with a distinct transcriptional profile.

2017-02-01 | GSE94354 | GEO

DNA methylation in neutrophils from Juvenile Idiopathic Arthritis

Project description:In this study, we combined the MeDIP-Seq and MRE-Seq data of 6 ADU (active disease, untreated) and 5 HC (health control) samples to obtatin the differentially methylated regions (DMRs) between ADU and HC using the repMnM R package, and observed that those DMRs can successfully classify the two groups.

2019-09-28 | GSE92749 | GEO

Remission in Juvenile Idiopathic Arthritis Achieved on Different Drug Regimens

Project description:Remission has become both the gold standard for clinical care and the end point for clinical trials for children with juvenile idiopathic arthritis (JIA). Using gene expression microarrays, we found that when remission induced by methotrexate (MTX) or MTX plus a TNF inhibitor (etanercept, Et) (MTX+Et) was compared with healthy controls, there were notable differences in gene expression patterns, demonstrating that remission is not a restoration of immunologic normalcy. Differences were detected in PBMC as well as in granulocytes. Total RNA was extracted from isolated PBMC and granulocytes from patients with polyarticular JIA and from healthy controls. Patients had achieved remission (clinical remission on medicine as defined by Wallace et al, Arthritis Rheum. 2005;52(11):3354-3562) using either MTX or MTX+Et.

2013-10-24 | E-GEOD-41831 | biostudies-arrayexpress

Transcription profiling of peripheral blood samples from juvenile idiopathic arthritis (JIA) patients pre and post methotrexate therapy. Expression data from SPARKS CHARMS JIA cohort

Project description:Gene expression on peripheral blood mononuclear cells (PBMC) from SPARKS CHARMS juvenile idiopathic arthritis (JIA) cohort pre and post methotrexate therapy. This is the first study to our knowledge, to evaluate gene expression profiles in children with JIA before and after MTX, and to analyze genetic variation in differentially expressed genes. We have identified a gene, which may contribute to genetic variability in MTX response in JIA. PBMC were isolated from blood samples taken from 11 patients with JIA pre methotrexate therapy and at 6 months into therapy

2010-09-27 | E-GEOD-23687 | biostudies-arrayexpress

Remission in Juvenile Idiopathic Arthritis Achieved on Different Drug Regimens

2013-10-24 | GSE41831 | GEO

Common Immunologic Pathways Between Oligoarticular and Polyarticular Juvenile Idiopathic Arthritis

Project description:The polyarticular and oligoarticular forms of juvenile idiopathic arthritis are classified as distinct entities. At the same time, many children who present with an oligoarticular phenotype eventually evolve to a polyarticular disease pattern, suggesting that the phenotypes might share with overlapping molecular mechanisms. Using gene expression microarrays, we found that 14 genes in neutrophils and 55 genes in PBMC shows common patterns of differential expression when children with active oligoarticular and polyarticular JIA were compared with healthy controls. These results demonstrate that there are commonalities between oligoarticular and polyarticular JIA that suggest overlapping immune mechanisms. Total RNA was extracted from isolated PBMC and neutrophils from 14 patients with polyarticular JIA and 8 patients with pauciarticular JIA. Total RNA was extracted from neutrophils from 13 healthy controls and from PBMC from 15 healthy controls. Insufficient RNA for microarrays was obtained from neutrophils from two of the healthy controls.

2015-04-07 | E-GEOD-67596 | biostudies-arrayexpress

Common Immunologic Pathways Between Oligoarticular and Polyarticular Juvenile Idiopathic Arthritis

2015-04-07 | GSE67596 | GEO

Remission in Polyarticular Juvenile Idiopathic Arthritis

Project description:Identify biomarkers to predict response to therapy in polyarticular juvenile idiopathic arthritis (JIA) using gene expression microarrays. 42 samples from 13 controls, 14 active patients, 9 patients in clinical remission with medication (CRM), and 6 patients in clinical remission without medication (CR). All patients had polyarticular JIA.

2009-04-13 | E-GEOD-15645 | biostudies-arrayexpress

Juvenile idiopathic arthritis: peripheral blood cells

Project description:Systemic-onset juvenile idiopathic arthritis (soJIA) is a rheumatic disease in childhood characterized by systemic symptoms and a relatively poor prognosis. The peripheral leukocytes are thought to play the pathological role of soJIA although the exact cause is still obscure. In this study, we aimed to clarify the cellular functional abnormality in those cells. Here, we analyzed the gene expression profile in peripheral leukocytes from 51 patients with soJIA, 6 patients with poly-articular type JIA (polyJIA) and 8 healthy children utilizing DNA microarrays. A total of 3,491 genes, including genes related to immune reponse and metabolism, were differentially expressed in patients with soJIA compared to healthy individuals. The result provides insight into the pathogenesis of soJIA. Keywords: disease state analysis Total RNA was extracted from peripheral leukocytes from 51 soJIA patients, 6 poly-articular type JIA patients, and 8 healthy children. The gene expression profile was analyzed with DNA microarrays.

2010-05-26 | E-GEOD-8361 | biostudies-arrayexpress

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