作者: David E. Misek , Samir M. Hanash , Rork Kuick , Mila Blaivas , Miroslav P. Bobek
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摘要: Astrocytomas are heterogeneous intracranial glial neoplasms ranging from the highly aggressive malignant glioblastoma multiforme (GBM) to indolent, low-grade pilocytic astrocytoma. We have investigated whether DNA microarrays can identify gene expression differences between high-grade and tumors. compared transcriptional profile of 45 astrocytic tumors including 21 GBMs 19 astrocytomas using oligonucleotide-based microarrays. Of ∼6800 genes that were analyzed, a set 360 provided molecular signature distinguished astrocytomas. Many transcripts increased in GBM not previously associated with gliomas found encode proteins properties suggest their involvement cell proliferation or migration. Microarray-based data for subset was validated real-time quantitative reverse transcription-PCR. Immunohistochemical analysis also localized protein products specific interest neoplastic cells Our study has identified large number novel distinct patterns gliomas.