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- W2955247130 abstract "Epidermal growth factor receptor (EGFR) amplification has been reported to occur in ~ 50% of glioblastomas (GBMs). We are conducting several global studies that require central testing for EGFR amplification during screening, representing an opportunity to confirm the frequency of amplification in GBM in a large cohort and to evaluate whether EGFR amplification differs by region of the world. EGFR amplification was measured by fluorescence in situ hybridization during screening for therapeutic trials of an EGFR antibody–drug conjugate: two Phase 2/3 global trials (INTELLANCE-1, INTELLANCE-2), and a Japanese Phase 1/2 trial (INTELLANCE-J). We evaluated the proportion of tumor tissue samples harboring EGFR amplification among those tested and differences in amplification frequency by geography. EGFR was amplified in 54% of 3150 informative cases screened for INTELLANCE-1 and -2, consistent with historic controls, but was significantly lower in patients from Asia versus the rest of the world (35% vs. 56%, P < 0.0030). The independent INTELLANCE-J trial validated this finding (33% amplified of 153 informative cases). EGFR amplification occurs less frequently in patients from Asia than elsewhere. Further study is required to understand biological differences to optimize treatment in glioblastoma." @default.
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- W2955247130 date "2019-07-04" @default.
- W2955247130 modified "2023-10-16" @default.
- W2955247130 title "Epidermal growth factor receptor (EGFR) amplification rates observed in screening patients for randomized trials in glioblastoma" @default.
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- W2955247130 doi "https://doi.org/10.1007/s11060-019-03222-y" @default.
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