M Molina-Arcas
Development of combination therapies to maximize the impact of KRAS-G12C inhibitors in lung cancer
Molina-Arcas, M; Moore, C; Rana, S; Van Maldegem, F; Mugarza, E; Romero-Clavijo, P; Herbert, E; Horswell, S; Li, L-S; Janes, M R; Hancock, D C; Downward, J
Authors
C Moore
S Rana
F Van Maldegem
E Mugarza
P Romero-Clavijo
E Herbert
S Horswell
L-S Li
M R Janes
D C Hancock
J Downward
Abstract
KRAS represents an excellent therapeutic target in lung cancer, the most commonly mutated form of which can now be blocked using KRAS-G12C mutant-specific inhibitory trial drugs. Lung adenocarcinoma cells harboring KRAS mutations have been shown previously to be selectively sensitive to inhibition of mitogen-activated protein kinase kinase (MEK) and insulin-like growth factor 1 receptor (IGF1R) signaling. Here, we show that this effect is markedly enhanced by simultaneous inhibition of mammalian target of rapamycin (mTOR) while maintaining selectivity for the KRAS-mutant genotype. Combined mTOR, IGF1R, and MEK inhibition inhibits the principal signaling pathways required for the survival of KRAS-mutant cells and produces marked tumor regression in three different KRAS-driven lung cancer mouse models. Replacing the MEK inhibitor with the mutant-specific KRAS-G12C inhibitor ARS-1620 in these combinations is associated with greater efficacy, specificity, and tolerability. Adding mTOR and IGF1R inhibitors to ARS-1620 greatly improves its effectiveness on KRAS-G12C mutant lung cancer cells in vitro and in mouse models. This provides a rationale for the design of combination treatments to enhance the impact of the KRAS-G12C inhibitors, which are now entering clinical trials.
Citation
Molina-Arcas, M., Moore, C., Rana, S., Van Maldegem, F., Mugarza, E., Romero-Clavijo, P., Herbert, E., Horswell, S., Li, L.-S., Janes, M. R., Hancock, D. C., & Downward, J. Development of combination therapies to maximize the impact of KRAS-G12C inhibitors in lung cancer. Science Translational Medicine, https://doi.org/10.1126/scitranslmed.aaw7999
Journal Article Type | Other |
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Deposit Date | Oct 5, 2019 |
Journal | Science Translational Medicine |
Print ISSN | 1946-6234 |
Electronic ISSN | 1946-6242 |
Publisher | American Association for the Advancement of Science |
DOI | https://doi.org/10.1126/scitranslmed.aaw7999 |
Public URL | https://rvc-repository.worktribe.com/output/1384782 |
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