Cited by 292Genomics, phytochemicals, and oxidative stressCancer, Hypoxia, and MetabolismLung Cancer Treatments and Mutations

LKB1 and KEAP1/NRF2 Pathways Cooperatively Promote Metabolic Reprogramming with Enhanced Glutamine Dependence in KRAS -Mutant Lung Adenocarcinoma

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Galan-Cobo, Ana, Sitthideatphaiboon, Piyada, Qu, Xiao, Poteete, Alissa, Pisegna, Marlese A., Tong, Pan, Chen, Pei-Hsuan, Boroughs, Lindsey K. +9 more·2019·Cancer Research

Published version of a preprint

Abstract

In KRAS-mutant lung adenocarcinoma, tumors with LKB1 loss (KL) are highly enriched for concurrent KEAP1 mutations, which activate the KEAP1/NRF2 pathway (KLK). Here, we investigated the biological consequences of these cooccurring alterations and explored whether they conferred specific therapeutic vulnerabilities. Compared with KL tumors, KLK tumors exhibited increased expression of genes involved in glutamine metabolism, the tricarboxylic acid cycle, and the redox homeostasis signature. Using isogenic pairs with knockdown or overexpression of LKB1, KEAP1, and NRF2, we found that LKB1 loss results in increased energetic and redox stress marked by increased levels of intracellular reactive oxygen species and decreased levels of ATP, NADPH/NADP+ ratio, and glutathione. Activation of the KEAP1/NRF2 axis in LKB1-deficient cells enhanced cell survival and played a critical role in the maintenance of energetic and redox homeostasis in a glutamine-dependent manner. LKB1 and the KEAP1/NRF2 pathways cooperatively drove metabolic reprogramming and enhanced sensitivity to the glutaminase inhibitor CB-839 in vitro and in vivo. Overall, these findings elucidate the adaptive advantage provided by KEAP1/NRF2 pathway activation in KL tumors and support clinical testing of glutaminase inhibitor in subsets of KRAS-mutant lung adenocarcinoma. Significance: In KRAS-mutant non–small cell lung cancer, LKB1 loss results in enhanced energetic/redox stress, which is tolerated, in part, through cooccurring KEAP1/NRF2–dependent metabolic adaptations, thus enhancing glutamine dependence and vulnerability to glutaminase inhibition.

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Crossref · 10.1158/0008-5472.can-18-3527

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  • We did not identify targets related to pathways previously investigated for STK11-mutant cancer therapy, such as glutamine synthesis or mTOR signaling.

    “we did not identify targets related to pathways previously investigated for STK11-mutant cancer therapy, such as glutamine synthesis (37) or mTOR signaling (38, 39).”

    From TNG260 Is a Small-Molecule CoREST Inhibitor That Sensitizes <i>STK11</i> -Mutant Tumors to Anti–PD-1 Immunotherapy (2025) · cites this paper as [37]

    The Introduction and Results describe glutamine metabolism as a therapeutic target in STK11/LKB1-mutant lung cancer and test the glutaminase inhibitor CB-839. They do not describe targeting glutamine synthesis; glutaminase instead converts glutamine to glutamate. Citation 37 is attached to the glutamine example, not the citing authors’ finding or the mTOR example. (LLM, conf=0.86)

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  • Loss of LKB1 in a mutant KRAS non-small cell lung cancer preclinical mouse model promotes NRF2-dependent metabolic alterations that increase glutamine dependence and vulnerability to glutaminase inhibition.

    “Separately, the loss of LKB1 in mutant KRAS non-small cell lung cancer preclinical mouse model was found to promote NRF2-dependent metabolic alterations that increased the tumor cells’ dependence on glutamine and created a vulnerability to glutaminase inhibition66.”
  • Cancer cells harboring KRAS, KEAP1, and LKB1 mutations may be more sensitive to glutaminase inhibition than normal counterparts.

    “Thus, cancer cells harboring KRAS, KEAP1 and LKB1 mutations may be more sensitive to glutaminase inhibition compared to normal counterparts66.”
  • NRF2-mediated metabolic reprogramming and regulation of redox homeostasis likely underpin the strong co-selection of KEAP1 with LKB1 and KRAS mutations in NSCLC.

    “Thus, NRF2- mediated metabolic reprogramming and regulation of redox homeostasis likely underpin the strong co-selection of KEAP1 with LKB1 and KRAS mutations in NSCLC at least partially because oncogenic KRAS itself promotes oxidative stress and anabolic metabolism and because KL NSCLC cells depend on the pentose phosphate pathway for NAPDH generation and for detoxification of reactive oxygen”

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Authors
Galan-Cobo, A., Sitthideatphaiboon, P., Qu, X., Poteete, A., Pisegna, M. A., Tong, P., Chen, P.-H., Boroughs, L. K., Rodriguez, M. L. M., Zhang, W., Parlati, F., Wang, J., Gandhi, V., Skoulidis, F., DeBerardinis, R. J., Minna, J. D., & Heymach, J. V.
Affiliations
  • 1Department of Thoracic, Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
  • Chulalongkorn University (TH)
  • Shandong University (CN)
  • The University of Texas MD Anderson Cancer Center (US)
  • Dana-Farber Cancer Institute (US)
  • 619946 Hibiscus Dr., Jupiter, Florida.
  • Calithera (United States) (US)
  • Children's Medical Center (US)
  • Harold C. Simmons Comprehensive Cancer Center (US)
Corresponding author
Heymach, John V.
Venue
Cancer Research
Published
2019-07-01
Volume
79
Issue
13
Pages
3251-3267
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2943618951
Cited by
292
References
55
Citations by year
2026: 33 · 2025: 36 · 2024: 37 · 2023: 41 · 2022: 55 · 2021: 45 · 2020: 35 · 2019: 10
FWCI
12.00
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • HHS | NIH | National Cancer InstituteHHS | NIH | National Cancer Institute (NCI) (P50CA07907, CA016672)
  • HHS | NIH | National Center for Research ResourcesHHS | NIH | National Center for Research Resources (NCRR) (CA205150)
  • Cancer Prevention and Research Institute of TexasCancer Prevention and Research Institute of Texas (CPRIT) (CP160652)
  • American Association for Cancer ResearchAmerican Association for Cancer Research (AACR) (SU2C-AACR-DT17-15)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics, phytochemicals, and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
Keywords
LKB1, Nrf2/Keap1 pathway, KRAS-mutant lung adenocarcinoma, metabolic reprogramming, glutamine addiction, glutaminase inhibition, CB-839, redox homeostasis, energy stress, reactive oxygen species, NADPH/NADP+ ratio, glutathione, TCA cycle
MeSH terms
Kelch-Like ECH-Associated Protein 1, Adenocarcinoma of Lung, AMP-Activated Protein Kinase Kinases, Adenosine Triphosphate, Animals, Carcinoma, Non-Small-Cell Lung, Energy Metabolism, Female, Glutaminase, Glutamine, Humans, Lung Neoplasms, Mice, Inbred BALB C, Mice, Nude, Mutation, Tumor Cells, Cultured, Biomarkers, Tumor, Signal Transduction, Gene Expression Regulation, Neoplastic, Proto-Oncogene Proteins p21(ras), Mice, SCID, Mice, Inbred NOD, Apoptosis, Protein Serine-Threonine Kinases, Oxidative Stress, Xenograft Model Antitumor Assays, Cell Proliferation, NF-E2-Related Factor 2, Mice, Metabolic Networks and Pathways, Cellular Reprogramming

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