Title |
BIM and mTOR expression levels predict outcome to erlotinib in EGFR-mutant non-small-cell lung cancer
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Published in |
Scientific Reports, December 2015
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DOI | 10.1038/srep17499 |
Pubmed ID | |
Authors |
Niki Karachaliou, Jordi Codony-Servat, Cristina Teixidó, Sara Pilotto, Ana Drozdowskyj, Carles Codony-Servat, Ana Giménez-Capitán, Miguel Angel Molina-Vila, Jordi Bertrán-Alamillo, Radj Gervais, Bartomeu Massuti, Teresa Morán, Margarita Majem, Enriqueta Felip, Enric Carcereny, Rosario García-Campelo, Santiago Viteri, María González-Cao, Daniela Morales-Espinosa, Alberto Verlicchi, Elisabetta Crisetti, Imane Chaib, Mariacarmela Santarpia, José Luis Ramírez, Joaquim Bosch-Barrera, Andrés Felipe Cardona, Filippo de Marinis, Guillermo López-Vivanco, José Miguel Sánchez, Alain Vergnenegre, José Javier Sánchez Hernández, Isabella Sperduti, Emilio Bria, Rafael Rosell |
Abstract |
BIM is a proapoptotic protein that initiates apoptosis triggered by EGFR tyrosine kinase inhibitors (TKI). mTOR negatively regulates apoptosis and may influence response to EGFR TKI. We examined mRNA expression of BIM and MTOR in 57 patients with EGFR-mutant NSCLC from the EURTAC trial. Risk of mortality and disease progression was lower in patients with high BIM compared with low/intermediate BIM mRNA levels. Analysis of MTOR further divided patients with high BIM expression into two groups, with those having both high BIM and MTOR experiencing shorter overall and progression-free survival to erlotinib. Validation of our results was performed in an independent cohort of 19 patients with EGFR-mutant NSCLC treated with EGFR TKIs. In EGFR-mutant lung adenocarcinoma cell lines with high BIM expression, concomitant high mTOR expression increased IC50 of gefitinib for cell proliferation. We next sought to analyse the signalling pattern in cell lines with strong activation of mTOR and its substrate P-S6. We showed that mTOR and phosphodiesterase 4D (PDE4D) strongly correlate in resistant EGFR-mutant cancer cell lines. These data suggest that the combination of EGFR TKI with mTOR or PDE4 inhibitors could be adequate therapy for EGFR-mutant NSCLC patients with high pretreatment levels of BIM and mTOR. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Spain | 4 | 33% |
United States | 3 | 25% |
Colombia | 1 | 8% |
Unknown | 4 | 33% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 5 | 42% |
Scientists | 4 | 33% |
Practitioners (doctors, other healthcare professionals) | 3 | 25% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Spain | 1 | 1% |
United States | 1 | 1% |
Unknown | 79 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 16 | 20% |
Student > Ph. D. Student | 12 | 15% |
Other | 9 | 11% |
Student > Master | 8 | 10% |
Student > Bachelor | 6 | 7% |
Other | 16 | 20% |
Unknown | 14 | 17% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 26 | 32% |
Biochemistry, Genetics and Molecular Biology | 10 | 12% |
Agricultural and Biological Sciences | 9 | 11% |
Pharmacology, Toxicology and Pharmaceutical Science | 6 | 7% |
Engineering | 5 | 6% |
Other | 7 | 9% |
Unknown | 18 | 22% |