Co-occurring Alterations in the RAS–MAPK Pathway Limit Response to MET Inhibitor Treatment in MET Exon 14 Skipping Mutation-Positive Lung Cancer
Category
Published on
Type
journal-article
Author
Julia K. Rotow and Philippe Gui and Wei Wu and Victoria M. Raymond and Richard B. Lanman and Frederic J. Kaye and Nir Peled and Ferran Fece de la Cruz and Brandon Nadres and Ryan B. Corcoran and Iwei Yeh and Boris C. Bastian and Petr Starostik and Kimberly Newsom and Victor R. Olivas and Alexander M. Wolff and James S. Fraser and Eric A. Collisson and Caroline E. McCoach and D. Ross Camidge and Jose Pacheco and Lyudmila Bazhenova and Tianhong Li and Trever G. Bivona and Collin M. Blakely
Citation
Rotow, J.K. et al., 2019. Co-occurring Alterations in the RAS–MAPK Pathway Limit Response to MET Inhibitor Treatment in MET Exon 14 Skipping Mutation-Positive Lung Cancer. Clinical Cancer Research, 26(2), pp.439–449. Available at: http://dx.doi.org/10.1158/1078-0432.ccr-19-1667.
Abstract
Abstract
Purpose:
Although patients with advanced-stage non–small cell lung cancers (NSCLC) harboring MET exon 14 skipping mutations (METex14) often benefit from MET tyrosine kinase inhibitor (TKI) treatment, clinical benefit is limited by primary and acquired drug resistance. The molecular basis for this resistance remains incompletely understood.
Experimental Design:
Targeted sequencing analysis was performed on cell-free circulating tumor DNA obtained from 289 patients with advanced-stage METex14-mutated NSCLC.
Results:
Prominent co-occurring RAS–MAPK pathway gene alterations (e.g., in KRAS, NF1) were detected in NSCLCs with METex14 skipping alterations as compared with EGFR-mutated NSCLCs. There was an association between decreased MET TKI treatment response and RAS–MAPK pathway co-occurring alterations. In a preclinical model expressing a canonical METex14 mutation, KRAS overexpression or NF1 downregulation hyperactivated MAPK signaling to promote MET TKI resistance. This resistance was overcome by cotreatment with crizotinib and the MEK inhibitor trametinib.
Conclusions:
Our study provides a genomic landscape of co-occurring alterations in advanced-stage METex14-mutated NSCLC and suggests a potential combination therapy strategy targeting MAPK pathway signaling to enhance clinical outcomes.
