Stratifying patients on the basis of molecular signatures could facilitate development of therapeutics that target pathways specific to a particular disease or tissue location. Previous studies suggest that pathogenesis of rheumatoid arthritis (RA) is similar in all affected joints. Here we show that distinct DNA methylation and transcriptome signatures not only discriminate RA fibroblast-like synoviocytes (FLS) from osteoarthritis FLS, but also distinguish RA FLS isolated from knees and hips. Using genome-wide methods, we show differences between RA knee and hip FLS in the methylation of genes encoding biological pathways, such as IL-6 signaling via JAK-STAT pathway. Furthermore, differentially expressed genes are identified between knee and hip FLS using RNA-seq. Double-evidenced genes that are both differentially methylated and expressed include multiple HOX genes. Joint-specific DNA signatures suggest that RA disease mechanisms might vary from joint to joint, thus potentially explaining some of the diversity of drug responses in RA patients. Overall design: Total RNA-seq from knee and hip joints in rheumatoid arthritis (RA)
Joint-specific DNA methylation and transcriptome signatures in rheumatoid arthritis identify distinct pathogenic processes.
Specimen part, Disease stage, Subject
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Specimen part, Cell line, Treatment
View SamplesAnalysis of the influence of celiac disease-associated bacteria and gluten on intestinal epithelial cells
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Cell line, Treatment
View SamplesAnalysis of the influence of celiac disease-associated bacteria and gluten on intestinal epithelial cells
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Cell line, Treatment
View SamplesAnalysis of the influence of celiac disease-associated bacteria on intestinal epithelial cells
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Cell line, Treatment
View SamplesAnalysis of role of small intestinal intraepithelial lymphocytes (IELs) in the immunopathology of celiac disease
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Specimen part
View SamplesAnalysis of role of small intestinal epithelial cells (IECs) in the immunopathology of celiac disease
Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
Specimen part
View SamplesVasoregression is a hallmark of vascular eye diseases but the mechanisms involved are still largely unknown. We have recently characterized a rat ciliopathy model which develops primary photoreceptor degeneration and secondary vasoregression. To improve the understanding of secondary vasoregression in retinal neurodegeneration, we used microarray techniques to compare gene expression profiles in this new model before and after retinal vasoregression. Differential gene expression was validated by quantitative RT-PCR, Western blot and immunofluorescence. Of the 374 genes regulated more than twofold, the MHC class II invariant chain CD74 yielded the strongest upregulation, and was allocated to activated microglial cells close to the vessels undergoing vasoregression. Pathway clustering identified genes of the immune system, inflammatory signaling, and components of the complement cascade upregulated during vasoregression. Furthermore, macroglial cells were markedly activated. Together, our data suggest that glial cells involved in retinal immune response participate in the initiation of vasoregression in the retina.
Gene expression profiling of vasoregression in the retina--involvement of microglial cells.
Specimen part
View SamplesComparison of laminin binding and laminin non-binding germ cells
Defining the spermatogonial stem cell.
No sample metadata fields
View SamplesRat germ cells
Defining the spermatogonial stem cell.
No sample metadata fields
View Samples