Cited by 50PI3K/AKT/mTOR signaling in cancerMicroRNA in disease regulationMetabolism, Diabetes, and Cancer

The mTOR pathway negatively controls ATM by up-regulating miRNAs

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Shen, Changxian, Houghton, Peter J.·2013·Proceedings of the National Academy of Sciences

Abstract

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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Authors
Shen, C., & Houghton, P. J.
Affiliations
Nationwide Children's Hospital (US)
Venue
Proceedings of the National Academy of Sciences
Published
2013-07
Volume
110
Issue
29
Pages
11869-11874
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
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
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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