title: Oncostatin M-induced genes in human astrocytomas.
abstract: Oncostatin M (OSM) is a member of the interleukin-6 (IL-6) cytokine family and known to be induced in the nervous system as a result of cell stress. OSM is expressed in most human brain tumors, but the effects on tumor cells are unclear. The cytokine is known to activate the JAK/STAT signaling pathway by binding to its receptors gp130/OSMbeta or gp130/LIFRbeta and thereby initiating activation or suppression of a number of STAT target genes. The objective of the study was to identify OSM-regulated genes that could help in understanding the function of OSM in glioma cells. The glioma cell line, U1242MG was stimulated by OSM and the gene expression patterns were analyzed by microarray. In total, nineteen differentially expressed genes were selected due to high intensity, level of up/down-regulation and biological functions. The differentially expressed genes were verified using quantitative PCR. Additional validation of the confirmed OSM-induced proteins was performed in human astrocytoma tissues by immunohistochemistry. Among the up-regulated genes were CHI3L1, PLAU, MT2A and EPAS1. These genes are known to be involved in cell matrix remodeling, migration, proliferation control and angiogenesis. The results suggest that OSM induces genes that might contribute to the development and progression of astrocytomas.
authors.affiliation: Lundberg Laboratory for Cancer Research, Department of Pathology, Institute of Biomedicine, Sahlgrenska University Hospital, Göteborg University, 413 45, Gothenburg, Sweden. annika.krona@llcr.med.gu.se
authors.forename: Annika
authors.initials: A
authors.lastname: Krona
authors.forename: Pierre
authors.initials: P
authors.lastname: Aman
authors.forename: Charlotte
authors.initials: C
authors.lastname: Orndal
authors.forename: Agnetha
authors.initials: A
authors.lastname: Josefsson
mesh_terms: D054392:Adipokines; D001254:Astrocytoma / Q000378:metabolism*; D051792:Basic Helix-Loop-Helix Proteins / Q000032:analysis / Q000235:genetics; D045744:Cell Line, Tumor; D000071451:Chitinase-3-Like Protein 1; D019926:Cyclin B / Q000032:analysis / Q000235:genetics; D056744:Cyclin B1; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D006023:Glycoproteins / Q000032:analysis / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D037102:Lectins; D053683:Oncostatin M / Q000494:pharmacology*; D014568:Urokinase-Type Plasminogen Activator / Q000032:analysis / Q000235:genetics; D000099162:Endothelial PAS Domain-Containing Protein 1
chemical_list: D054392:Adipokines; D051792:Basic Helix-Loop-Helix Proteins; D000071451:Chitinase-3-Like Protein 1; D019926:Cyclin B; D056744:Cyclin B1; D006023:Glycoproteins; D037102:Lectins; D053683:Oncostatin M; D014568:Urokinase-Type Plasminogen Activator; D000099162:Endothelial PAS Domain-Containing Protein 1; C534699:CCNB1 protein, human; C084533:CHI3L1 protein, human