Dataset Information

E-GEOD-79970

ABSTRACT: Peripheral Blood Mononuclear Cells (PBMC) Gene Expression-Based Biomarkers in Juvenile Idiopathic Arthritis (JIA)

DISEASE(S): Rheumatoid Factor-negative Juvenile Idiopathic Arthritis,Normal

PROVIDER: E-GEOD-79970 | ExpressionAtlas | 2021-01-19

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-79970-analysis-methods.tsv	Tabular
	E-GEOD-79970-analytics.tsv	Tabular
	E-GEOD-79970-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-79970-configuration.xml	Xml
	E-GEOD-79970-g1_g2-mvaPlot.png	Other

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Project description:Objective. To identify gene expression differences in peripheral blood from patients with early and late onset juvenile idiopathic arthritis (JIA). Methods. Peripheral blood mononuclear cells (PBMC) were isolated from 56 healthy controls and 104 patients with recent onset JIA (39 persistent oligoarticular, 45 RF-polyarticular, and 20 systemic). Poly(A) RNA was amplified and labeled using NuGEN Ovation, and gene expression assessed with Affymetrix HG-U133 Plus 2.0 GeneChips®. Results. A total of 832 probe sets revealed gene expression differences (false-discovery rate 5%) in PBMC from children with oligoarticular JIA whose disease began before 6 years of age (age at onset [AaO] <6; early onset), compared to subjects whose disease began at 6 years of age or later (AaO ?6; late onset). In early onset patients there was greater expression of genes related to B-cells, and lesser expression of genes related to cells of the myeloid lineage. Support Vector Machine algorithms identified samples from early or late onset oligoarticular (97% accuracy) or polyarticular (89% accuracy) JIA patients, but not systemic JIA patients or healthy controls. Principal component analysis showed that the major classifier of samples was AaO regardless of whether they had oligoarticular or polyarticular JIA. Conclusion. PBMC gene expression analysis reveals biologic differences between early and late onset JIA patients independent of classification based on the number of joints involved. These data suggest AaO may be an important parameter to consider in JIA classification. Furthermore, different pathologic mechanisms may influence AaO, and understanding these processes may lead to improved treatment of JIA. Methods. Peripheral blood mononuclear cells (PBMC) were isolated from 56 healthy controls and 104 patients with recent onset JIA (39 persistent oligoarticular, 45 RF-polyarticular, and 20 systemic). Poly(A) RNA was amplified and labeled using NuGEN Ovation, and gene expression assessed with Affymetrix HG-U133 Plus 2.0 GeneChips®.

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E-GEOD-79970

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