PMID- 27507562 OWN - NLM STAT- MEDLINE DCOM- 20180223 LR - 20191210 IS - 1097-0347 (Electronic) IS - 1043-3074 (Linking) VI - 39 IP - 1 DP - 2017 Jan TI - Combination of phosphotidylinositol-3-kinase targeting with cetuximab and irradiation: A preclinical study on an orthotopic xenograft model of head and neck cancer. PG - 151-159 LID - 10.1002/hed.24560 [doi] AB - BACKGROUND: The purpose of this study was to investigate the effects of combining the phosphotidylinositol-3-kinase (PI3K) inhibitor buparlisib (BKM)120 with the anti-epidermal growth factor receptor (EGFR) agent cetuximab and radiotherapy (RT) on an orthotopic model of head and neck squamous cell carcinoma (HNSCC). METHODS: We evaluated the antitumor efficacy of BKM120, cetuximab, and RT, administered alone or in combination, using the human PIK3CA-mutated HNSCC cell line, CAL33, injected into the floor of the mouth of nude mice. RESULTS: Compared with control, the BKM120-cetuximab and the BKM120-cetuximab-RT combinations led to the highest tumor inhibition (p < .001). The highest inhibitory effect of treatments on cell proliferation, mitogen-activated protein kinase (MAPK) and PI3K/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) signaling pathways were found with the BKM120-cetuximab association. The association of BKM120 and cetuximab with RT inhibited RT-induced activation of the MAPK pathway. CONCLUSION: These results can serve as a preclinical rationale for innovative treatments combining PI3K inhibition with anti-EGFR therapies and irradiation in patients with HNSCC. (c) 2016 Wiley Periodicals, Inc. Head Neck 39: 151-159, 2017. CI - (c) 2016 Wiley Periodicals, Inc. FAU - Bozec, Alexandre AU - Bozec A AD - University Institute of the Face and Neck, Nice cedex, France. FAU - Ebran, Nathalie AU - Ebran N AD - Department of Oncopharmacology, Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. FAU - Radosevic-Robin, Nina AU - Radosevic-Robin N AD - Department of Pathology, Jean Perrin Comprehensive Cancer Centre, Clermont-Ferrand, France. AD - ERTICa Research Group, University of Auvergne, Clermont-Ferrand, France. FAU - Chamorey, Emmanuel AU - Chamorey E AD - Department of Clinical Research, Innovation and Statistics (DRIS), Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. FAU - Yahia, Hedi Ben AU - Yahia HB AD - Department of Oncopharmacology, Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. FAU - Marcie, Serge AU - Marcie S AD - Department of Physics, Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. FAU - Gautier, Mathieu AU - Gautier M AD - Department of Physics, Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. FAU - Penault-Llorca, Frederique AU - Penault-Llorca F AD - Department of Pathology, Jean Perrin Comprehensive Cancer Centre, Clermont-Ferrand, France. AD - ERTICa Research Group, University of Auvergne, Clermont-Ferrand, France. FAU - Milano, Gerard AU - Milano G AD - Department of Oncopharmacology, Antoine Lacassagne Comprehensive Cancer Centre, Nice cedex, France. LA - eng PT - Journal Article DEP - 20160810 PL - United States TA - Head Neck JT - Head & neck JID - 8902541 RN - 0 (Aminopyridines) RN - 0 (Antineoplastic Agents, Immunological) RN - 0 (Morpholines) RN - 0 (NVP-BKM120) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) RN - PQX0D8J21J (Cetuximab) SB - IM MH - Aminopyridines/*therapeutic use MH - Animals MH - Antineoplastic Agents, Immunological/*therapeutic use MH - Carcinoma, Squamous Cell/*drug therapy/pathology/*radiotherapy MH - Cetuximab/*therapeutic use MH - Combined Modality Therapy MH - Disease Models, Animal MH - Female MH - Head and Neck Neoplasms/*drug therapy/pathology/*radiotherapy MH - Mice MH - Mice, Nude MH - Morpholines/*therapeutic use MH - *Phosphoinositide-3 Kinase Inhibitors MH - Squamous Cell Carcinoma of Head and Neck MH - Xenograft Model Antitumor Assays OTO - NOTNLM OT - epidermal growth factor receptor (EGFR) OT - head and neck cancer OT - phosphatidylinositol 3-kinase (PIK3CA) OT - radiotherapy OT - targeted therapy EDAT- 2016/08/11 06:00 MHDA- 2018/02/24 06:00 CRDT- 2016/08/11 06:00 PHST- 2016/01/25 00:00 [received] PHST- 2016/03/24 00:00 [revised] PHST- 2016/06/27 00:00 [accepted] PHST- 2016/08/11 06:00 [pubmed] PHST- 2018/02/24 06:00 [medline] PHST- 2016/08/11 06:00 [entrez] AID - 10.1002/hed.24560 [doi] PST - ppublish SO - Head Neck. 2017 Jan;39(1):151-159. doi: 10.1002/hed.24560. Epub 2016 Aug 10.