Cited by 1,323Autophagy in Disease and TherapyCancer, Hypoxia, and MetabolismProtein Kinase Regulation and GTPase Signaling

Activated Ras requires autophagy to maintain oxidative metabolism and tumorigenesis

Open access
Guo, Jessie Yanxiang, Chen, Hsin-Yi, Mathew, Robin, Fan, Jing, Strohecker, Anne M., Karsli-Uzunbas, Gizem, Kamphorst, Jurre J., Chen, Guanghua +7 more·2011·Genes & Development

Abstract

Autophagy is a catabolic pathway used by cells to support metabolism in response to starvation and to clear damaged proteins and organelles in response to stress. We report here that expression of a H-ras V12 or K-ras V12 oncogene up-regulates basal autophagy, which is required for tumor cell survival in starvation and in tumorigenesis. In Ras-expressing cells, defective autophagosome formation or cargo delivery causes accumulation of abnormal mitochondria and reduced oxygen consumption. Autophagy defects also lead to tricarboxylic acid (TCA) cycle metabolite and energy depletion in starvation. As mitochondria sustain viability of Ras-expressing cells in starvation, autophagy is required to maintain the pool of functional mitochondria necessary to support growth of Ras-driven tumors. Human cancer cell lines bearing activating mutations in Ras commonly have high levels of basal autophagy, and, in a subset of these, down-regulating the expression of essential autophagy proteins impaired cell growth. As cancers with Ras mutations have a poor prognosis, this “autophagy addiction” suggests that targeting autophagy and mitochondrial metabolism are valuable new approaches to treat these aggressive cancers.

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Crossref · 10.1101/gad.2016311

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  • RAS-driven cancers depend on autophagy for survival.

    “RAS-driven cancers rely on autophagy for survival163, and this complex cellular process also seems to have immunomodulatory effects that promote tumour immune evasion.”
  • In human cancer cell lines or tumors bearing KRAS mutations, high levels of basal autophagy were observed, making inhibition of autophagy therapeutically actionable in KRAS-driven tumors.

    “in human cancer cell lines or tumors bearing KRAS mutations, high levels of basal autophagy were observed, making inhibition of autophagy therapeutically actionable in KRAS-driven tumors (64, 65).”

    From New Horizons in KRAS-Mutant Lung Cancer: Dawn After Darkness (2019) · cites this paper as [64]

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Authors
Guo, J. Y., Chen, H.-Y., Mathew, R., Fan, J., Strohecker, A. M., Karsli-Uzunbas, G., Kamphorst, J. J., Chen, G., Lemons, J. M. S., Karantza, V., Coller, H. A., DiPaola, R. S., Gelinas, C., Rabinowitz, J. D., & White, E.
Affiliations
  • Rutgers Cancer Institute (US)
  • Rutgers, The State University of New Jersey (US)
  • Princeton University (US)
Venue
Genes & Development
Published
2011-02-11
Volume
25
Issue
5
Pages
460-470
ISSN
  • 0890-9369 (ISSN-L)
  • 1549-5477
OpenAlex
W2101228747
Cited by
1,323
References
33
Citations by year
2026: 27 · 2025: 56 · 2024: 58 · 2023: 70 · 2022: 88 · 2021: 120 · 2020: 91 · 2019: 95 · 2018: 105 · 2017: 97 · 2016: 95 · 2015: 86 · 2014: 92 · 2013: 106 · 2012: 76
Type
posted content
Language
en
Open access
Locations
  • Genes & Development (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense
  • Rutgers Cancer Institute of New Jersey
  • National Institutes of Health (R37 CA53370)
  • National Cancer Institute (R37CA053370, R37-CA53370, R00CA133181, RC1CA147961, R01CA130893, P30CA072720)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
autophagy, oncogenic Ras, H-Ras V12, carcinogenesis, mitochondrial metabolism, oxidative metabolism, starvation, autophagosome formation, mitochondrial dysfunction, TCA cycle metabolites, oxygen consumption, cancer therapy targets
MeSH terms
Animals, Autophagy, Cell Line, Cell Survival, Energy Metabolism, Humans, Mitochondria, Oxidation-Reduction, Genes, ras, Starvation, Gene Expression Regulation, Neoplastic, HCT116 Cells, Cell Line, Tumor, Cell Proliferation, Mice

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