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- W2298774806 abstract "Glioblastoma multiforme (GBM), the most aggressive and most common malignant adult brain tumor, accounts for ∼50% of all gliomas and it is classified histologically as grade IV. Growing evidence for intratumor heterogeneity shows that single-site biopsies or selected profiling of a portion of a resected tumor falls short of revealing the complete genomic landscape of the entire tumor. EGFR amplification occurs in ∼50% of primary GBM tumors, and is frequently associated with the expression of a constitutively active, ligand-independent mutant form of the receptor, EGFRvIII. Glioma circulating tumor cells (gCTCs) have recently been identified in the blood of glioma patients by our research group. In this study, we report that gCTCs can be captured, enumerated and genetically characterized for EGFRvIII. To achieve this goal, we have thus far a) detected gCTCs through a Telomerase promoter–based assay, b) isolated individual gCTCs using a vacuum-assisted capillary microdissection approach, c) performed whole transcriptome amplification and d) analyzed the expression of EGFRviii by qPCR under optimized conditions. Furthermore, our group is conducting an IRB-approved pilot study with the purpose of examining the feasibility of this approach (to support initiation of an expanded study). In this study, we seek to characterize the genetic heterogeneity of individual gCTCs from high grade glioma patients. This approach would have major impact as it will clarify the biologically-relevant question of heterogeneity of gCTCs in a given patient with glioma, predict whether a patient would respond or be resistant to a molecularly targeted therapy, unravel the overall mechanistic underpinnings of a given patient's brain tumor, and lastly, track the biological evolution of the tumor over the patient's treatment course and post-treatment period. Our ultimate goal is to streamline predictive testing and effectively utilize a Neurooncology targeted biomarker to benefit patients." @default.
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- W2298774806 date "2015-11-01" @default.
- W2298774806 modified "2023-09-27" @default.
- W2298774806 title "CBM-03MOLECULAR CHARACTERIZATION OF GLIOMA CIRCULATING TUMOR CELLS (gCTCs) AT SINGLE CELL RESOLUTION" @default.
- W2298774806 doi "https://doi.org/10.1093/neuonc/nov211.03" @default.
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