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• W2006302180 abstract "Abstract To identify novel glioma‐associated pathomechanisms and molecular markers, we performed an array‐based comparative genomic hybridization analysis of 131 diffuse astrocytic gliomas, including 87 primary glioblastomas (pGBIV), 13 secondary glioblastomas (sGBIV), 19 anaplastic astrocytomas (AAIII) and 12 diffuse astrocytomas (AII). All tumors were additionally screened for IDH1 and IDH2 mutations. Expression profiling was performed for 74 tumors (42 pGBIV, 11 sGBIV, 13 AAIII, 8 AII). Unsupervised and supervised bioinformatic analyses revealed distinct genomic and expression profiles separating pGBIV from the other entities. Classifier expression signatures were strongly associated with the IDH1 gene mutation status. Within pGBIV, the rare subtype of IDH1 mutant tumors shared expression profiles with IDH1 mutant sGBIV and was associated with longer overall survival compared with IDH1 wild‐type tumors. In patients with IDH1 wild‐type pGBIV, PDGFRA gain or amplification as well as 19q gain were associated with patient outcome. Array‐CGH analysis additionally revealed homozygous deletions of the FGFR2 gene at 10q26.13 in 2 pGBIV, with reduced FGFR2 mRNA levels being frequent in pGBIV and linked to poor outcome. In conclusion, we report that diffuse astrocytic gliomas can be separated into 2 major molecular groups with distinct genomic and mRNA profiles as well as IDH1 gene mutation status. In addition, our results suggest FGFR2 as a novel glioma‐associated candidate tumor suppressor gene on the long arm of chromosome 10." @default.
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• W2006302180 date "2010-05-12" @default.
• W2006302180 modified "2023-10-16" @default.
• W2006302180 title "Molecular signatures classify astrocytic gliomas by <i>IDH1</i> mutation status" @default.
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• W2006302180 doi "https://doi.org/10.1002/ijc.25448" @default.
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