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Gene amplification is a poor prognostic factor in anaplastic oligodendrogliomas.

Abstract : Various gene amplifications have been observed in gliomas. Prognostic-genomic correlations testing simultaneously all these amplified genes have never been conducted in anaplastic oligodendrogliomas. A set of 38 genes that have been reported to be amplified in gliomas and investigated as the main targets of amplicons were studied in a series of 52 anaplastic oligodendrogliomas using bacterial artificial chromosome-array based comparative genomic hybridization and quantitative polymerase chain reaction. Among the 38 target genes, 15 were found to be amplified in at least one tumor. Overall, 27% of anaplastic oligodendrogliomas exhibited at least one gene amplification. The most frequently amplified genes were epidermal growth factor receptor (EGFR) and cyclin-dependent kinase 4/sarcoma amplified sequence (CDK4/SAS) in 17% and 8% of anaplastic oligodendrogliomas, respectively. Gene amplification and codeletion of chromosome arms 1p/19q were perfectly exclusive (p = 0.005). In uni- and multivariate analyses, gene amplification was a negative prognostic factor for progression-free survival and overall survival in anaplastic oligodendrogliomas, providing complementary information to the classic prognostic factors identified in anaplastic oligodendrogliomas (extent of surgery, KPS, and chromosome arms 1p/19q status).
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Contributor : Ahmed Idbaih <>
Submitted on : Tuesday, August 12, 2008 - 6:22:56 PM
Last modification on : Thursday, December 10, 2020 - 3:42:22 AM

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Ahmed Idbaih, Emmanuelle Crinière, Yannick Marie, Audrey Rousseau, Karima Mokhtari, et al.. Gene amplification is a poor prognostic factor in anaplastic oligodendrogliomas.. Neuro-Oncology, Oxford University Press (OUP), 2008, 10 (4), pp.540-7. ⟨10.1215/15228517-2008-022⟩. ⟨inserm-00310501⟩



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