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Gene expression analysis of the human glioma cell line U87MG

ABSTRACT: Identification of genes and pathways regulated by kynurenine in human glioma cells

ORGANISM(S): Homo sapiens

PROVIDER: GSE25272 | GEO | 2010/11/11

SECONDARY ACCESSION(S): PRJNA134813

REPOSITORIES: GEO

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Gene expression analysis of the human glioma cell line U87MG

Project description:Identification of genes and pathways regulated by kynurenine in human glioma cells Total RNA from U87MG cells was extraced after 8h or 24h of treatment with 100µM kynurenine and compared to untreated control.

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Induction of cyclooxygenase-2 expression by interleukin-1beta in human glioma cell line, U87MG.

Project description:Cyclooxygenase-2 (COX-2) is up-regulated in most high-grade gliomas, and high COX-2 expression is associated with aggressive character and poor prognosis. However, the effect of COX-2 in human glioma cell lines is not well known. This study examined the effect of several stimuli, including interleukin-1beta (IL-1beta) and carcinogens, on COX-2 induction in normal astrocyte cells and human glioma cell lines U87MG, A172, and T98G. IL-1beta-induced COX-2 expression strongly at both protein and messenger ribonucleic acid levels in only the U87MG cells of the glioma cell lines. Furthermore, carcinogen induced COX-2 expression. Similar findings were also observed in normal human astrocyte cells. The U87MG glioma cell line is a good model for COX-2 induction in glioma cell lines.

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PDGF Engages an E2F-USP1 Signaling Pathway to Support ID2-mediated Survival of Proneural Glioma Cells.

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Project description:Malignant gliomas are considered to be one of the deadliest human cancers, accounting for about 60% of all primary brain tumors. Cachexia is a complex metabolic derangement and muscle atrophy syndrome, which causes high mortalities in patients with advanced cancers including brain tumors. However, cachexia symptoms induced by gliomas and mechanisms underlying muscle atrophy are unclear. Herein, we developed a glioma cachexia model using nude mice orthotopicly implanted with two glioma cell lines (WHO II CHG5 and WHO IV U87). U87 mice developed more severe cachexia symptoms than CHG5 mice, including more evident anorexia, greater body weight loss and mortality. Unlike non-central nervous system cancer cachexia, glioma cachexia did not induce remarkable systemic inflammation but massive multi-organ atrophy. It also caused significantly decreased skeletal muscle mass and strength, which were associated with down-regulated myosin and AKT, and up-regulated AMPK, FOXO and Atrogin1. Interestingly, expressions of MuRF1, MyoD1, eIF3f, desmin and vimentin were not significantly changed. Consistently, NMR-based metabolomic analyses revealed pronounced metabolic derangements in cachectic gastrocnemius relative to controls. Glucose, glycerol, 3-hydroxybutyrate and glycine were remarkably down-regulated, whereas largely released amino acids due to proteolysis including glutamate, arginine, leucine and isoleucine were up-regulated in cachectic gastrocnemius. Moreover, glucose and lipid metabolism, protein biosynthesis and amino acid metabolism were disturbed dramatically in both glioma-bearing mice. U87 mice showed more changed metabolite levels and altered metabolic pathways. This work uncovers malignant grade-dependent glioma cachexia symptoms and metabolic derangements of skeletal muscle for the first time, and provides hints for new therapeutic approaches.

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2016-03-22 | E-GEOD-77423 | biostudies-arrayexpress

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