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Genetic analysis of human glioblastomas using a genomic microarray system

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Abstract

Genomic microarray systems can simultaneously provide substantial genetic and chromosomal information in a relatively short time. We have analyzed genomic DNA from frozen sections of 30 cases of primary glioblastomas by GenoSensor Array 300 in order to characterize gene amplifications, gene deletions, and chromosomal information in the whole genome. Genes that were frequently amplified includedPFC2/CYLN2 (63.3%),EGFR (53.3%),IL6 (53.3%),ABCB1 (MDR1) (36.7%), andPDGFRA (26.7%). Genes that were frequently deleted includedFGFR2 (66.7%),MTAP (60.0%),DMBT1 (56.7%),CDKN2A (p16)/MTAP (50.0%),PIK3CA (43.3%), andEGR2 (43.3%), but deletion ofRB1 orTP53 was rarely detected. Chromosomal gains were observed frequently for 7q (33.3%), 7p (20.0%), and 17q (13.3%). Loss of the 10q was frequently detected in 13 of 30 cases (46.7%). Loss of the entire chromosome 10 was seen in 9 of 30 cases (30.0%), and was often accompanied byEGFR amplification (7 cases, 77.8%). The GenoSensor Array 300 proved to be useful for identification of genome-wide molecular changes in glioblastomas. The obtained microarray profile can also yield valuable insight into the molecular events underlying carcinogenesis of brain tumors and may provide clues about clinical correlations, including response to treatment.

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Authors and Affiliations

  1. Department of Neurosurgery, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, 565-0871, Suita, Osaka, Japan

    Tsuyoshi Suzuki, Motohiko Maruno, Kouichi Wada, Naoki Kagawa, Yasunori Fujimoto, Naoya Hashimoto, Shuichi Izumoto & Toshiki Yoshimine

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  1. Tsuyoshi Suzuki
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  2. Motohiko Maruno
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  3. Kouichi Wada
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  4. Naoki Kagawa
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  5. Yasunori Fujimoto
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  6. Naoya Hashimoto
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  7. Shuichi Izumoto
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  8. Toshiki Yoshimine
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Correspondence to Motohiko Maruno.

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Suzuki, T., Maruno, M., Wada, K. et al. Genetic analysis of human glioblastomas using a genomic microarray system. Brain Tumor Pathol 21, 27–34 (2004). https://doi.org/10.1007/BF02482174

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  • DOI: https://doi.org/10.1007/BF02482174

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