Abstract
Purpose
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.
Methods
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.
Results
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).
Conclusions
EGFR amplification occurs less frequently in patients from Asia than elsewhere. Further study is required to understand biological differences to optimize treatment in glioblastoma.
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Acknowledgements
The authors and AbbVie would like to thank patients and their families/caregivers; study investigators and staff; Mrinal Y. Shah, PhD for medical writing support, and Yan Sun, PhD for statistical support, both employees of AbbVie, Inc.
Funding
AbbVie provided financial support for these studies (NCT02573324, NCT02343406, NCT02590263) and participated in the design, study conduct, analysis and interpretation of the data, as well as the writing, review, and approval of the manuscript. All authors were involved in the data gathering, analysis, review, interpretation and manuscript preparation and approval. A.B. Lassman was supported in part Voices Against Brain Cancer, the William Rhodes and Louise Tilzer-Rhodes Center for Glioblastoma at NewYork-Presbyterian Hospital, and grants P30CA013696 and UG1CA189960 from the National Cancer Institute. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Cancer Institute/National Institutes of Health.
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Contribution to study design—ABL, PJA, EB, WC, PJF, JL, MM, CO, MAV, TJCW, PZ, MJvdB. Study conduct and patient treatment—ABL, KDA, EB, WC, ME, MK, JL, YM, YN, CO, MAV, AMEW, TJCW, MJvdB. Data collection, analysis, and interpretation—ABL, PJA, LRR, MS, MJvdB. Manuscript review and approval of the final version for submission—All authors.
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Andrew B. Lassman: In the last 36 months, Dr. Lassman reports grants, personal fees and non-financial support from AbbVie, during the conduct of the study; personal fees and non-financial support from Orbus, grants, personal fees and non-financial support from Karyopharm, personal fees and non-financial support from NW Biotherapeutics, grants and non-financial support from Oncoceutics, personal fees and non-financial support from Agios, personal fees and non-financial support from Celgene, personal fees and non-financial support from Novocure, non-financial support from Tocagen, non-financial support from BMS, grants, personal fees and non-financial support from Kadmon, grants, personal fees and non-financial support from Roche/Genentech, grants and non-financial support from Amgen, grants and non-financial support from Millenium, grants and non-financial support from Celldex, grants and non-financial support from Novartis, grants and non-financial support from Pfizer, non-financial support from Keryx/Aeterna Zentaris, grants and non-financial support from VBI Vaccines, grants and non-financial support from Beigene, personal fees from Bioclinica as an expert blinded independent reviewer of clinical and imaging data for a BMS-sponsored trial, personal fees from prIME Oncology, personal fees from Sapience, personal fees from WebMD, personal fees from Physicians' Education Resource/Chemotherapy Foundation Symposium, personal fees from Astra Zeneca, personal fees from Cortice, outside the submitted work. Kenneth D. Aldape: Nothing to disclose. Peter J. Ansell, Earle Bain, Jim Looman, Christopher Ocampo, Lisa Roberts-Rapp: Employees of AbbVie and may own stock/options. Walter J. Curran: Consultant for AstraZeneca and BMS; ownership shares of Nanthealth. Marica Eoli: Nothing to disclose. Pim J. French: Research funding from AbbVie. Manabu Kinoshita: Honoraria from Eisai, BrainLab, Nihon Medi-Physics, Canon Medical Systems, Integra Japan, Novocure, Daiichi-Sankyo, Chugai; research grants from Chugai, Daiichi-Sankyo, Takeda, Ohtsuka. Minesh Mehta: Consultant for Agenus, Insys, Remedy, IBA, Varian, Celgene, AbbVie, AstraZeneca, Tocagen, Blue Earth Diagnostics; board of directors with stock options, Oncoceutics. Yoshihiro Muragaki: Consulting/advisory role for AbbVie, Daiichi Sankyo; speakers’ bureau for MSD, Daiichi Sankyo, Chugai Pharma, Otsuka, Eisai, Novartis, Hitachi, Bristol-Myers Squibb Japan; research funding to institution from MSD, Daiichi Sankyo, Chugai Pharma, Otsuka, Eisai, Hitachi. Yoshitaka Narita: Grants and lectures fees from Chugai Pharmaceutical Co., Ono Pharmaceutical Co., AbbVie, Dainippon-Sumitomo, Daiichi Sankyo, Eisai, Stella-Pharma, Ohtuka, Meiji-Seika, SBI Pharma. Minghao Song: Employee of Abbott Molecular and may own stock/options. Michael A. Vogelbaum: Indirect equity and royalty interests in Infuseon Therapeutics, Inc. Annemiek Walenkamp: Research grants from Novartis, Ipsen; advisory board member for Ipsen, Novartis, Polyphor, Karyopharm; study budget from Karyopharm, BMS, Genzyme, Roche. Tony J. C. Wang: Personal fees and non-financial support from AbbVie; outside of the submitted work, consultant for Elekta, Merck, Doximity; advisory board and travel expenses for Novocure, AstraZeneca; honoraria from Elekta, Cancer Panels; stock options from Doximity; royalties from Wolters Kluwer. Peixin Zhang: Nothing to disclose. Martin J. van den Bent: Personal fees from AbbVie, Celgene, Genenta, BMS, Agios, Boehringer Ingelheim; research funding from AbbVie.
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Lassman, A.B., Aldape, K.D., Ansell, P.J. et al. Epidermal growth factor receptor (EGFR) amplification rates observed in screening patients for randomized trials in glioblastoma. J Neurooncol 144, 205–210 (2019). https://doi.org/10.1007/s11060-019-03222-y
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DOI: https://doi.org/10.1007/s11060-019-03222-y