PloS one, 2013-02, Vol.8 (2), p.e56389-e56389
2013
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- Autor(en) / Beteiligte
- Titel
- Transcriptional patterns in peritoneal tissue of encapsulating peritoneal sclerosis, a complication of chronic peritoneal dialysis
- Ist Teil von
- PloS one, 2013-02, Vol.8 (2), p.e56389-e56389
- Ort / Verlag
- United States: Public Library of Science
- Erscheinungsjahr
- 2013
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- Encapsulating peritoneal sclerosis (EPS) is a devastating complication of peritoneal dialysis (PD), characterized by marked inflammation and severe fibrosis of the peritoneum, and associated with high morbidity and mortality. EPS can occur years after termination of PD and, in severe cases, leads to intestinal obstruction and ileus requiring surgical intervention. Despite ongoing research, the pathogenesis of EPS remains unclear. We performed a global transcriptome analysis of peritoneal tissue specimens from EPS patients, PD patients without EPS, and uremic patients without history of PD or EPS (Uremic). Unsupervised and supervised bioinformatics analysis revealed distinct transcriptional patterns that discriminated these three clinical groups. The analysis identified a signature of 219 genes expressed differentially in EPS as compared to PD and Uremic groups. Canonical pathway analysis of differentially expressed genes showed enrichment in several pathways, including antigen presentation, dendritic cell maturation, B cell development, chemokine signaling and humoral and cellular immunity (P value<0.05). Further interactive network analysis depicted effects of EPS-associated genes on networks linked to inflammation, immunological response, and cell proliferation. Gene expression changes were confirmed by qRT-PCR for a subset of the differentially expressed genes. EPS patient tissues exhibited elevated expression of genes encoding sulfatase1, thrombospondin 1, fibronectin 1 and alpha smooth muscle actin, among many others, while in EPS and PD tissues mRNAs encoding leptin and retinol-binding protein 4 were markedly down-regulated, compared to Uremic group patients. Immunolocalization of Collagen 1 alpha 1 revealed that Col1a1 protein was predominantly expressed in the submesothelial compact zone of EPS patient peritoneal samples, whereas PD patient peritoneal samples exhibited homogenous Col1a1 staining throughout the tissue samples. The results are compatible with the hypothesis that encapsulating peritoneal sclerosis is a distinct pathological process from the simple peritoneal fibrosis that accompanies all PD treatment.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1932-6203eISSN: 1932-6203DOI: 10.1371/journal.pone.0056389Titel-ID: cdi_plos_journals_1331593524
- Format
- –
- Schlagworte
- Actin, Aged, Analysis, Antigen presentation, Bioinformatics, Biology, Cell proliferation, Cell-mediated immunity, Collagen, Collagen (type I), Collagen Type I - genetics, Collagen Type I - metabolism, Dendritic cells, Dialysis, Encapsulation, Female, Fibronectin, Fibronectins, Fibrosis, Gastrointestinal diseases, Gene expression, Gene Expression Profiling, Gene Regulatory Networks - genetics, Genes, Genetic aspects, Growth factors, Health aspects, Health care policy, Hospitals, Humans, Humoral immunity, Immunity, Immunohistochemistry, Immunology, Internal medicine, Intestine, Kidney Diseases - therapy, Leptin, Leptin - genetics, Lymphocytes B, Male, Medical schools, Medicine, Middle Aged, Morbidity, Mortality, Muscle proteins, Muscles, Nephrology, Network analysis, Oligonucleotide Array Sequence Analysis, Pathogenesis, Pathology, Patients, Peritoneal dialysis, Peritoneal Dialysis - adverse effects, Peritoneal Fibrosis - etiology, Peritoneal Fibrosis - genetics, Peritoneal Fibrosis - metabolism, Peritoneum, Peritoneum - metabolism, Peritoneum - pathology, Physicians, Protein binding, Retinoids, Retinol-binding protein, Retinol-Binding Proteins, Plasma - genetics, Reverse Transcriptase Polymerase Chain Reaction, RNA, Messenger - genetics, RNA, Messenger - metabolism, Sclerosis, Signal Transduction - genetics, Signaling, Smooth muscle, Stem cells, Surgery, Thrombospondin, Tissues, Transcription, Transcription (Genetics), Transplants & implants, Vitamin A