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Coordinate Direct Input of Both KRAS and IGF1 Receptor to Activation of PI3 kinase in KRAS -Mutant Lung Cancer
Open accessPublished version of a preprint
Abstract
Using a panel of non–small cell lung cancer (NSCLC) lines, we show here that MAP-ERK kinase (MEK) and RAF inhibitors are selectively toxic for the KRAS-mutant genotype, whereas phosphoinositide 3-kinase (PI3K), AKT, and mTOR inhibitors are not. IGF1 receptor (IGF1R) tyrosine kinase inhibitors also show selectivity for KRAS-mutant lung cancer lines. Combinations of IGF1R and MEK inhibitors resulted in strengthened inhibition of KRAS-mutant lines and also showed improved effectiveness in autochthonous mouse models of Kras-induced NSCLC. PI3K pathway activity is dependent on basal IGF1R activity in KRAS-mutant, but not wild-type, lung cancer cell lines. KRAS is needed for both MEK and PI3K pathway activity in KRAS-mutant, but not wild-type, lung cancer cells, whereas acute activation of KRAS causes stimulation of PI3K dependent upon IGF1R kinase activity. Coordinate direct input of both KRAS and IGF1R is thus required to activate PI3K in KRAS-mutant lung cancer cells. Significance: It has not yet been possible to target RAS proteins directly, so combined targeting of effector pathways acting downstream of RAS, including RAF/MEK and PI3K/AKT, has been the most favored approach to the treatment of RAS-mutant cancers. This work sheds light on the ability of RAS to activate PI3K through direct interaction, indicating that input is also required from a receptor tyrosine kinase, IGF1R in the case of KRAS-mutant lung cancer. This suggests potential novel combination therapeutic strategies for NSCLC. Cancer Discov; 3(5); 548–63. ©2013 AACR. See related commentary by Chen and Sweet-Cordero, p. 491 This article is highlighted in the In This Issue feature, p. 471
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“High basal ERBB2/3 associated with epithelial gene signatures was observed in KRAS (G12C) cell lines and human lung cancers.”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [133]
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“This changed cell type is more sensitive to co-inhibition by SHP2 and SOS1 [130–135].”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [133]
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“The IGF1R/ERBB2/3 signaling pathway may respond to the suppressed ERK and AKT signaling after KRAS (G12C) inhibitor treatment and favor the change to epithelial cell types (Fig. 5).”
From Targeting KRAS mutant cancers: from druggable therapy to drug resistance (2022) · cites this paper as [133]
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Metadata
- Authors
- Molina-Arcas, M., Hancock, D. C., Sheridan, C., Kumar, M. S., & Downward, J.
- Affiliations
- Authors' Affiliations: 1Signal Transduction Laboratory, Cancer Research UK London Research Institute; and 2Lung Cancer Group, Division of Cancer Biology, The Institute of Cancer Research, London, United Kingdom
- Institute of Cancer Research (GB)
- Corresponding author
- Downward, Julian
- Venue
- Cancer Discovery
- Published
- 2013-05-01
- Volume
- 3
- Issue
- 5
- Pages
- 548-563
- ISSN
- 2159-8274 (ISSN-L)
- 2159-8290
- PMC
- PMC3650991
- OpenAlex
- W2169546036
- Cited by
- 157
- References
- 52
- Citations by year
- 2026: 3 · 2025: 6 · 2024: 7 · 2023: 7 · 2022: 11 · 2021: 19 · 2020: 12 · 2019: 11 · 2018: 11 · 2017: 12 · 2016: 14 · 2015: 13 · 2014: 21 · 2013: 10
- FWCI
- 8.67
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Cancer Discovery (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Cancer Research UK (A3570, 15680)
- European Commission
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
- Keywords
- KRAS mutation, non-small cell lung cancer, IGF-1 receptor, PI3K activation, MEK inhibitors, RAF inhibitors, PI3K/AKT/mTOR inhibitors, combination therapy, Ras signaling, receptor tyrosine kinase, drug selectivity
- MeSH terms
- Animals, Carcinoma, Non-Small-Cell Lung, Humans, Lung Neoplasms, Mice, Transgenic, Proto-Oncogene Proteins, Proto-Oncogene Proteins p21(ras), Receptor, IGF Type 1, ras Proteins, Phosphatidylinositol 3-Kinases, Mitogen-Activated Protein Kinase Kinases, Cell Line, Tumor, Mice
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