A chemical genetic screen identifies Aurora kinases as a therapeutic target in EGFR T790M negative, gefitinib-resistant head and neck squamous cell carcinoma (HNSCC)

EBioMedicine

Anders Martin Jacobsen Skanderup¹  Dawn Pingxi Lau²  Hui-Sun Leong²  Xue-Lin Kwang²  Ramanuj DasGupta²  Giridharan Periyasamy²  Fui-Teen Chong²  Matan Thangavelu Thangavelu³  Judice Lie Yong Koh³  Jane Vin Chan⁴  N Gopalakrishna Iyer⁴  Neha Rohatgi⁵  Daniel Shao Weng Tan⁵  Stephen Qi Rong Wong⁶  Joo-Leng Low⁶  Shivaji Rikka⁶  Xiaoqian Zhang⁶ 

[1] Centre for High Throughput Phenomics (CHiP-GIS), Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore;Cancer Therapeutics Research Laboratory, National Cancer Centre Singapore, 11 Hospital Crescent, Singapore 169610, Singapore;Centre for High Throughput Phenomics (CHiP-GIS), Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore;Computational Phenomics Platform, Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore;Laboratory of Computational Cancer Genomics, Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore;Laboratory of Precision Oncology and Cancer Evolution, Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), 60 Biopolis Street, Genome 02-01, Singapore 138672, Singapore;

关键词: Head and neck squamous cell carcinoma;    Gefitinib resistance;    Aurora kinase inhibition;    EGFR T790M negative;    Chemical genetics;   

DOI  :  

来源: DOAJ

【 摘 要 】

Background: Overexpression of epidermal growth factor receptor (EGFR), and downstream pathway activation appears to be a common oncogenic driver in the majority of head and neck squamous cell cancers (HNSCCs); yet targeting EGFR for the treatment of HNSCC has met with limited success. Apart from the anti-EGFR antibody cetuximab, no small molecule EGFR/tyrosine kinase inhibitors (TKIs) have progressed to routine clinical use. The aim of this study was to determine factors contributing to the lack of response to TKIs and identify alternative therapeutic vulnerabilities. Methods: Genomic and transcriptomic sequencing, high-throughput compound screens, overexpression and siRNA knockdown, western blot, in vivo xenograft studies. Findings: We derived three pairs of isogenic gefitinib (TKI)-sensitive and resistant patient-derived HNSCC cell lines. Genomic sequencing of gefitinib-resistant cell lines identified a lack of activating and resistance-associated EGFR mutations. Instead, transcriptomic sequencing showed upregulated EMT gene signature in the gefitinib-resistant cells with a corresponding increase in their migratory phenotype. Additionally, the resistant cell displayed reduced growth rate. Surprisingly, while gefitinib-resistant cells were independent of EGFR for survival, they nonetheless displayed activation of downstream ERK and AKT signalling. High-throughput screening (HTS) of druggable, small molecule libraries revealed that the gefitinib-resistant cells were particularly sensitive to inhibitors of genes involved in cell cycle and mitosis, such as Aurora kinase inhibitors (AKIs), cyclin-dependent kinase (CDK) inhibitors, and microtubule inhibitors. Notably our results showed that in the EGFR inhibited state, Aurora kinases are essential for cell survival. Interpretation: Our study demonstrates that in the absence of activating EGFR mutations, HNSCCs may gain resistance to gefitinib through decreased cell proliferation, which makes them exceptionally vulnerable to cell-cycle inhibitors. Funding: Agency for Science, Technology, and Research (A*STAR), National Medical Research Council (NMRC), and the National Institutes of Health (NIH)/National Cancer Institute (NCI).

【 授权许可】

Unknown