Cited by 1,483Autophagy in Disease and TherapyPI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and Cancer

Role of AMPK-mTOR-Ulk1/2 in the regulation of autophagy: cross talk, shortcuts, and feedbacks

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Alers, Sebastian, Löffler, Antje S., Wesselborg, Sebastian, Stork, Björn·2012·Molecular and Cellular Biology

Abstract

Living cells are adaptive self-sustaining systems. They strictly depend on the sufficient supply of oxygen, energy, and nutrients from the outside in order to sustain their internal organization. However, as autonomous entities they are able to monitor and appropriately adapt to any critical fluctuation in their environment. In the case of insufficient external nutrient supply or augmented energy demands, cells start to extensively digest their own interior. This process, known as macroautophagy, comprises the transport of cytosolic portions and entire organelles to the lysosomal compartment via specific double-membrane vesicles, called autophagosomes. Although extensively upregulated under nutrient restriction, a low level of basal autophagy is likewise crucial in order to sustain the cellular homeostasis. On the other hand, cells have to avoid excessive and enduring self-digestion. The delicate balance between external energy and nutrient supply and internal production and consumption is a demanding task. The complex protein network that senses and precisely reacts to environmental changes is thus mainly regulated by rapid and reversible posttranslational modifications such as phosphorylation. This review focuses on the serine/threonine protein kinases AMP-activated protein kinase, mammalian target of rapamycin (mTOR), and unc-51-like kinase 1/2 (Ulk1/2), three interconnected major junctions within the autophagy regulating signaling network.

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Authors
Alers, S., Löffler, A. S., Wesselborg, S., & Stork, B.
Affiliations
Universitätsklinikum Tübingen (DE)
Corresponding author
  • Alers, Sebastian
  • Stork, Björn
Venue
Molecular and Cellular Biology
Published
2012-01-01
Volume
32
Issue
1
Pages
2-11
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2102776209
Cited by
1,483
References
123
Citations by year
2026: 54 · 2025: 119 · 2024: 151 · 2023: 117 · 2022: 140 · 2021: 121 · 2020: 126 · 2019: 96 · 2018: 97 · 2017: 101 · 2016: 98 · 2015: 93 · 2014: 74 · 2013: 57 · 2012: 37
FWCI
40.49
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Deutsche Forschungsgemeinschaft
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
autophagy regulation, AMPK, mTOR, macroautophagy, autophagosome formation, nutrient sensing, energy homeostasis, post-translational modification, phosphorylation, signaling networks, lysosomal degradation, cellular homeostasis
MeSH terms
Animals, Autophagy, Humans, Signal Transduction, Protein Serine-Threonine Kinases, AMP-Activated Protein Kinases, TOR Serine-Threonine Kinases

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