Abstract

Radiotherapy has a central role in the treatment of head and neck squamous cell carcinoma (HNSCC). Activation of the PI3K/AKT/mTOR pathway can decrease the efficiency of radiotherapy via the promotion of cell survival and DNA repair. Here, the influence of PI3K pathway inhibition on radiotherapy response was investigated. Two PI3K inhibitors were investigated and both BKM120 and GDC0980 effectively inhibited cellular and clonogenic growth in 6 HNSCC cells, both HPV-positive as well as HPV-negative. Despite targeted inhibition of the pathway and slight increase in DNA damage, PI3K inhibition did not show significant radiosensitization. Currently only one clinical trial is assessing the effectiveness of combining BKM120 with RT in HNSCC (NCT02113878) of which the results are eagerly awaited.

Details

Title
The influence of PI3K inhibition on the radiotherapy response of head and neck cancer cells
Author
Glorieux, Mary 1 ; Rüveyda, Dok 1 ; Nuyts, Sandra 2 

 KU Leuven, University of Leuven, Laboratory of Experimental Radiotherapy, Department of Oncology, Leuven, Belgium (GRID:grid.5596.f) (ISNI:0000 0001 0668 7884) 
 KU Leuven, University of Leuven, Laboratory of Experimental Radiotherapy, Department of Oncology, Leuven, Belgium (GRID:grid.5596.f) (ISNI:0000 0001 0668 7884); Leuven Cancer Institute, UZ Leuven, Department of Radiation Oncology, Leuven, Belgium (GRID:grid.410569.f) (ISNI:0000 0004 0626 3338) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2449453794
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.