The mTOR pathway negatively controls ATM by up-regulating miRNAs
Open accessAbstract
The ataxia telangiectasia mutated (ATM) checkpoint is the central surveillance system that maintains genome integrity. We found that in the context of childhood sarcoma, mammalian target of rapamycin (mTOR) signaling suppresses ATM by up-regulating miRNAs targeting ATM . Pharmacological inhibition or genetic down-regulation of the mTOR pathway resulted in increase of ATM mRNA and protein both in mouse sarcoma xenografts and cultured cells. mTOR Complex 1 (mTORC1) suppresses ATM via S6K1/2 signaling pathways. microRNA-18a and microRNA-421, both of which target ATM, are positively controlled by mTOR signaling. Our findings have identified a negative feedback loop for the signaling between ATM and mTOR pathways and suggest that oncogenic growth signals may promote tumorigenesis by dampening the ATM checkpoint.
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mTORC1 activation via glutaminolysis suppresses autophagy and the DNA damage response.
“In addition, mTORC1 activation via glutaminolysis suppresses autophagy and the DNA damage response164,165.”
From Glutamine reliance in cell metabolism (2020) · cites this paper as [165]
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Glutamine reliance in cell metabolism
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- Authors
- Shen, C., & Houghton, P. J.
- Affiliations
- Nationwide Children's Hospital (US)
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2013-07
- Volume
- 110
- Issue
- 29
- Pages
- 11869-11874
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC3718104
- OpenAlex
- W2097142668
- Cited by
- 50
- References
- 50
- Citations by year
- 2026: 1 · 2025: 2 · 2023: 2 · 2022: 8 · 2021: 7 · 2020: 1 · 2019: 9 · 2018: 2 · 2017: 5 · 2016: 5 · 2015: 5 · 2014: 2 · 2013: 1
- FWCI
- 1.94
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (n01cm42216-11-0-1)
- National Cancer Institute (N01CM42216, N01 CM042216, R01CA077776, CA77776)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Keywords
- mTOR signaling, ATM, microRNA, microRNA-18a, mTORC1, S6K1, S6K2, DNA damage checkpoint, genome stability, pediatric sarcoma, negative feedback loop, carcinogenesis
- MeSH terms
- Animals, Cells, Cultured, DNA-Binding Proteins, Female, Morpholines, Sarcoma, Signal Transduction, Gene Expression Regulation, Neoplastic, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Feedback, Physiological, Tumor Suppressor Proteins, MicroRNAs, Mice, TOR Serine-Threonine Kinases, Ataxia Telangiectasia Mutated Proteins
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