Cited by 46PI3K/AKT/mTOR signaling in cancerLung Cancer Treatments and MutationsMetabolism, Diabetes, and Cancer

Heightening Energetic Stress Selectively Targets LKB1-Deficient Non–Small Cell Lung Cancers

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Momcilovic, Milica, McMickle, Robert, Abt, Evan, Seki, Atsuko, Simko, Sarah A., Magyar, Clara, Stout, David B., Fishbein, Michael C. +3 more·2015·Cancer Research

Published version of a preprint

Abstract

Inactivation of the LKB1 tumor suppressor is a frequent event in non–small cell lung carcinoma (NSCLC) leading to the activation of mTOR complex 1 (mTORC1) and sensitivity to the metabolic stress inducer phenformin. In this study, we explored the combinatorial use of phenformin with the mTOR catalytic kinase inhibitor MLN0128 as a treatment strategy for NSCLC bearing comutations in the LKB1 and KRAS genes. NSCLC is a genetically and pathologically heterogeneous disease, giving rise to lung tumors of varying histologies that include adenocarcinomas and squamous cell carcinomas (SCC). We demonstrate that phenformin in combination with MLN0128 induced a significant therapeutic response in KRAS/LKB1–mutant human cell lines and genetically engineered mouse models of NSCLC that develop both adenocarcinomas and SCCs. Specifically, we found that KRAS/LKB1–mutant lung adenocarcinomas responded strongly to phenformin + MLN0128 treatment, but the response of SCCs to single or combined treatment with MLN0128 was more attenuated due to acquired resistance to mTOR inhibition through modulation of the AKT-GSK signaling axis. Combinatorial use of the mTOR inhibitor and AKT inhibitor MK2206 robustly inhibited the growth and viability of squamous lung tumors, thus providing an effective strategy to overcome resistance. Taken together, our findings define new personalized therapeutic strategies that may be rapidly translated into clinical use for the treatment of KRAS/LKB1–mutant adenocarcinomas and squamous cell tumors. Cancer Res; 75(22); 4910–22. ©2015 AACR.

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  1. [20]Thoreen CC Kang SA Chang JW Liu Q Zhang J Gao Y An ATP-competitive mTOR inhibitor reveals rapamycin-insensitive functions of mTORC1. J Biol Chem 2009 PMC2658096 19150980

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Authors
Momcilovic, M., McMickle, R., Abt, E., Seki, A., Simko, S. A., Magyar, C., Stout, D. B., Fishbein, M. C., Walser, T. C., Dubinett, S. M., & Shackelford, D. B.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Shackelford, David B.
Venue
Cancer Research
Published
2015-11-15
Volume
75
Issue
22
Pages
4910-4922
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2179686101
Cited by
46
References
55
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 8 · 2018: 11 · 2017: 8 · 2016: 2
FWCI
3.04
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (UL1TR000124, KL2TR000122)
  • National Cancer Institute (P30CA016042)
  • National Center for Advancing Translational Sciences
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
LKB1, non-small cell lung cancer, phenformin, MLN0128, mTOR inhibition, KRAS mutation, metabolic stress, acquired drug resistance, lung adenocarcinoma, squamous cell carcinoma, MK-2206, combination therapy, precision oncology
MeSH terms
AMP-Activated Protein Kinase Kinases, Adenine, Animals, Antineoplastic Combined Chemotherapy Protocols, Benzoxazoles, Carcinoma, Non-Small-Cell Lung, Disease Models, Animal, Humans, Immunohistochemistry, Lung Neoplasms, Phenformin, Pyrimidines, Stress, Physiological, Proto-Oncogene Proteins p21(ras), Apoptosis, Protein Serine-Threonine Kinases, Cell Line, Tumor, Mice, AMP-Activated Protein Kinases

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