Cited by 570Genetics, Aging, and Longevity in Model OrganismsPI3K/AKT/mTOR signaling in cancerAutophagy in Disease and Therapy

Sestrin as a feedback inhibitor of TOR that prevents age-related pathologies

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Lee, Jun Hee, Budanov, Andrei V., Park, Eek Joong, Birse, Ryan, Kim, Teddy E., Perkins, Guy A., Ocorr, Karen, Ellisman, Mark H. +3 more·2010·Science

Abstract

Sestrins are conserved proteins that accumulate in cells exposed to stress, potentiate adenosine monophosphate-activated protein kinase (AMPK), and inhibit activation of target of rapamycin (TOR). We show that the abundance of Drosophila sestrin (dSesn) is increased upon chronic TOR activation through accumulation of reactive oxygen species that cause activation of c-Jun amino-terminal kinase and transcription factor Forkhead box O (FoxO). Loss of dSesn resulted in age-associated pathologies including triglyceride accumulation, mitochondrial dysfunction, muscle degeneration, and cardiac malfunction, which were prevented by pharmacological activation of AMPK or inhibition of TOR. Hence, dSesn appears to be a negative feedback regulator of TOR that integrates metabolic and stress inputs and prevents pathologies caused by chronic TOR activation that may result from diminished autophagic clearance of damaged mitochondria, protein aggregates, or lipids.

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  • Increased mTOR activity can cause certain cells to undergo differentiation or senescence, thereby exiting the proliferative cell pool.

    “increased mTOR activity can also cause certain cells to undergo differentiation or senescence, thereby exiting the proliferative cell pool (Castilho et al., 2009; Chen et al., 2008; Lee et al., 2010; Liu et al., 2007; Zhang et al., 2006; reviewed in Iglesias-Bartolome and Gutkind, 2011).”
  • A reduction in ROS formation after mTOR blockade has been documented in drosophila cells and human T cells.

    “a reduction in ROS formation after mTOR blockade has been documented in drosophila cells and human T cells, albeit by a yet to be determined molecular mechanism (Lee et al., 2010; Schieke et al., 2006)”

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Authors
Lee, J. H., Budanov, A. V., Park, E. J., Birse, R., Kim, T. E., Perkins, G. A., Ocorr, K., Ellisman, M. H., Bodmer, R., Bier, E., & Karin, M.
Affiliations
  • University of California San Diego (US)
  • Sanford Burnham Prebys Medical Discovery Institute (US)
Corresponding author
  • Bier, Ethan
  • Karin, Michael
Venue
Science
Published
2010-03-05
Volume
327
Issue
5970
Pages
1223-1228
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2026044755
Cited by
570
References
32
Citations by year
2026: 13 · 2025: 20 · 2024: 27 · 2023: 25 · 2022: 28 · 2021: 46 · 2020: 56 · 2019: 35 · 2018: 40 · 2017: 41 · 2016: 37 · 2015: 35 · 2014: 31 · 2013: 30 · 2012: 52
FWCI
15.00
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (P30-CA-23100, R01CA118165, CA118165, P30CA023100)
  • National Institute of Allergy and Infectious Diseases (AI070654)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK082080, K99DK082080)
  • National Institute of Neurological Disorders and Stroke (NS 29870)
  • National Institute of Environmental Health Sciences (P42ES010337, ES-006376, R01ES006376)
  • National Center for Research Resources (P41RR004050)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
sestrins, TOR signaling, AMPK, negative feedback regulation, aging, reactive oxygen species, c-Jun N-terminal kinase, FOXO, mitochondrial dysfunction, triglyceride accumulation, muscle degeneration, cardiac dysfunction, autophagy, Drosophila
MeSH terms
Aging, Amino Acid Sequence, Animals, Autophagy, Drosophila melanogaster, Fat Body, Gene Expression Regulation, Heart, Heat-Shock Proteins, Mitochondria, Muscle, Molecular Sequence Data, Muscles, Protein Kinases, Transcription, Genetic, Triglycerides, Wings, Animal, Signal Transduction, Reactive Oxygen Species, Oxidative Stress, Models, Animal, Feedback, Physiological, Drosophila Proteins, JNK Mitogen-Activated Protein Kinases, Cell Size, Forkhead Transcription Factors, AMP-Activated Protein Kinases, TOR Serine-Threonine Kinases

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