Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of human normal mucosa, cecum, ascending, transverse, sigmoid and rectum

ABSTRACT: Normal human colorectal mucosa was sampled at points along the colon. Experiment Overall Design: Normal human colorectal mucosa, cecum, ascending, transverse, sigmoid and rectum

ORGANISM(S): Homo sapiens

SUBMITTER: Lawrence LaPointe

PROVIDER: E-GEOD-9254 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Map of differential transcript expression in the normal human large intestine.

LaPointe Lawrence C LC Dunne Robert R Brown Glenn S GS Worthley Daniel L DL Molloy Peter L PL Wattchow David D Young Graeme P GP

Physiological genomics 20071204 1

While there is considerable research related to using differential gene expression to predict disease phenotype classification, e.g., neoplastic tissue from nonneoplastic controls, there is little understanding of the range of expression in normal tissues. Understanding patterns of gene expression in nonneoplastic tissue, including regional anatomic expression changes within an organ, is vital to understanding gene expression changes in diseased tissue. To explore the gene expression change alon ...[more]

PMID: 18056783

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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

Transcription profiling of human normal mucosa, cecum, ascending, transverse, sigmoid and rectum

Publications

Map of differential transcript expression in the normal human large intestine.

Similar Datasets

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