Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Regulatory mechanisms of TSG-6 (TNF-alfa-induced protein-6: Tnfip6)-deficient and wild-type synovial fibroblasts

ABSTRACT: BALB/c mice are susceptible to proteoglycan (PG) aggrecan-induced arthritis (PGIA), and the absence of TSG-6 further increases susceptibility and local inflammatory reactions, including neutrophil invasion into the joints. To gain insight into the mechanisms of TSG-6 action, synovial fibroblasts were isolated from wild-type and TSG-6-KO mice, cultured and exposed to various agents affecting either the TSG-6 expression and/or modify the intracellular function of TSG-6. In the present microarray studies, we have identified differences in gene expression by fibroblasts isolated from wild-type or TSG-6-KO mice Keywords: Genetic modification In this study we compared the gene expression profile of 42 fibroblast cultures from mouse synovial samples. Fifteen samples were wild-type and 27 samples were TSG-6 knockout. In these two genotype groups fibroblasts were treated with TNFa, LPS, TSG-6, HA, or HA+TSG-6, and were compared to untreated samples in the same genotype group. We also compared the same treatments between KO and WT.

ORGANISM(S): Mus musculus

SUBMITTER: Tibor Glant

PROVIDER: E-GEOD-17160 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

TSG-6 protein, a negative regulator of inflammatory arthritis, forms a ternary complex with murine mast cell tryptases and heparin.

Nagyeri Gyorgy G Radacs Marianna M Ghassemi-Nejad Sheida S Tryniszewska Beata B Olasz Katalin K Hutas Gabor G Gyorfy Zsuzsa Z Hascall Vincent C VC Glant Tibor T TT Mikecz Katalin K

The Journal of biological chemistry 20110512 26

TSG-6 (TNF-α-stimulated gene/protein 6), a hyaluronan (HA)-binding protein, has been implicated in the negative regulation of inflammatory tissue destruction. However, little is known about the tissue/cell-specific expression of TSG-6 in inflammatory processes, due to the lack of appropriate reagents for the detection of this protein in vivo. Here, we report on the development of a highly sensitive detection system and its use in cartilage proteoglycan (aggrecan)-induced arthritis, an autoimmune ...[more]

PMID: 21566135

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Project description:We have compared synovial biopsies from ankylosing spondylitis and undifferentiated spondylitis patients with healthy controls and osteoarthritis patients Objective: In spondylarthropies, whole-genome gene expression profiling studies have been limited to peripheral blood to date. By undertaking a study in knee synovial biopsies from spondylarthropy (SpA) and ankylosing spondylitis (AS) patients we aimed to identified joint-specific candidate genes and pathways. These pathways may mediate systemic inflammation driven joint damaging processes and more specifically, the osteoproliferation that is characteristic of these conditions. Methods: RNA was extracted from six seronegative SpA, two AS, three osteoarthritis (OA) and four normal control knee synovial biopsies. Whole genome expression profiling was undertaken using the Illumina DASL system, which assays 24000 cDNA probes. Differentially expressed candidate genes were then validated using quantitative PCR and immunohistochemistry. Results: 416 differentially expressed genes were identified that clearly delineated between AS/SpA and control groups. Pathway analysis showed altered gene-expression in oxidoreductase activity, osteoblast activity, B-cell associated, matrix catabolic, and metabolic pathways. The inflammatory mediator, MMP3, was strongly upregulated in AS/SpA samples and the Wnt pathway inhibitors DKK3 and Kremen1 were downregulated. Conclusion: Pathways mediating both systemic inflammation as well as local tissue changes were identified. This suggests initial systemic inflammation in spondylarthropies transfers to and persists in the local joint environment, subsequently mediating changes in genes directly involved in the destructive tissue remodelling. Fifteen knee synovial biopsy tissue samples consisting of six seronegative spondyloarthropy (SpA), two ankylosing spondylitis (AS), three osteoarthritis (OA) and four normal control biopsies were obtained from the Synovial Tissue Bank at the Repatriation General Hospital in Adelaide, South Australia with the appropriate ethical approval (Supplementary Table 1). All patients provided informed written consent.

Dataset Information

Regulatory mechanisms of TSG-6 (TNF-alfa-induced protein-6: Tnfip6)-deficient and wild-type synovial fibroblasts

Publications

TSG-6 protein, a negative regulator of inflammatory arthritis, forms a ternary complex with murine mast cell tryptases and heparin.

Similar Datasets

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