Please use this identifier to cite or link to this item:
Title: Hsp90 inhibitors enhance the antitumoral effect of osimertinib in parental and osimertinib-resistant non-small cell lung cancer cell lines
Author: Codony Servat, Jordi
Viteri, Santiago
Codony Servat, Carles
Ito, Masaoki
Bracht, Jillian Willhelmina Paulina
Berenguer, Jordi
Chaib, Imane
Molina Vila, Miguel Angel
Karachaliou, Niki
Rosell, Rafael
Keywords: Càncer de pulmó
Medicaments antineoplàstics
Lung cancer
Antineoplastic agents
Issue Date: 1-Aug-2019
Publisher: AME Publishing Company
Abstract: Background: Osimertinib improve therapy for non-small cell lung cancer (NSCLC). However, invariable acquired resistance appears. Methods: MTT assay was used to analyze cell viability. Protein expression and activation was detected by Western blotting. In addition, the effects of heat shock protein 90 (Hsp90) inhibitors and osimertinib were studied in colony formation assays. Results: Our laboratory generated osimertinib resistant cell lines from PC9 cell line and overexpression or activation of several proteins was detected. Hsp90 inhibitors, ganetespib and luminespib, inhibited cell viability and colony formation in H1975, PC9 and PC9-derived osimertinib-resistant cell lines and combination of these inhibitors with osimertinib achieved to enhance this cell viability and colony formation inhibition. Luminespib downregulated the expression of the several proteins involved in osimertinib-resistance and the combination of this compound plus osimertinib caused an important decrease of expression of several of these proteins, such as Stat3, Yap, Akt, EGFR and Met. Osimertinib activated the phosphorylation of several membrane receptors and downstream molecules that was partially inhibited by luminespib. In addition, a lung cancer patient with an EGFR eon 20 mutation had a partial radiographic response to ganetespib. Conclusions: Hsp90 inhibitors and osimertinib exhibits a good efficiency to inhibit cell viability, colony formation and inhibits expression and activation of proteins involved in osimertinib-resistance and may represent an effective strategy for NSCLC with intrinsic resistance to osimertinib inhibition.
Note: Reproducció del document publicat a:
It is part of: Translational Lung Cancer Research, 2019, vol. 8, num. 4, p. 340-351
Related resource:
Appears in Collections:Articles publicats en revistes (Institut d'lnvestigació Biomèdica de Bellvitge (IDIBELL))

Files in This Item:
File Description SizeFormat 
Codony-ServatJ.pdf3.01 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons