Cited by 633PI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and CancerCancer-related Molecular Pathways

The Regulation of AMPK β1, TSC2, and PTEN Expression by p53: Stress, Cell and Tissue Specificity, and the Role of These Gene Products in Modulating the IGF-1-AKT-mTOR Pathways

Feng, Zhaohui, Hu, Wenwei, de Stanchina, Elisa, Teresky, Angelika K., Jin, Shengkan, Lowe, Scott, Levine, Arnold J.·2007·Cancer Research

Published version of a preprint

Abstract

The insulin-like growth factor 1 (IGF-1)-AKT-mTOR pathways sense the availability of nutrients and mitogens and respond by signaling for cell growth and division. The p53 pathway senses a variety of stress signals which will reduce the fidelity of cell growth and division, and responds by initiating cell cycle arrest, senescence, or apoptosis. This study explores four p53-regulated gene products, the β1 and β2 subunits of the AMPK, which are shown for the first time to be regulated by the p53 protein, TSC2, PTEN, and IGF-BP3, each of which negatively regulates the IGF-1-AKT-mTOR pathways after stress. These gene products are shown to be expressed under p53 control in a cell type and tissue-specific fashion with the TSC2 and PTEN proteins being coordinately regulated in those tissues that use insulin-dependent energy metabolism (skeletal muscle, heart, white fat, liver, and kidney). In addition, these genes are regulated by p53 in a stress signal–specific fashion. The mTOR pathway also communicates with the p53 pathway. After glucose starvation of mouse embryo fibroblasts, AMPK phosphorylates the p53 protein but does not activate any of the p53 responses. Upon glucose starvation of E1A-transformed mouse embryo fibroblasts, a p53-mediated apoptosis ensues. Thus, there is a great deal of communication between the p53 pathway and the IGF-1-AKT and mTOR pathways. [Cancer Res 2007;67(7):3043–53]

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Crossref · 10.1158/0008-5472.can-06-4149

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  • p53 activation is able to inhibit the activity of mTOR through a pathway involving the subsequent activation of TSC1 and TSC2.

    “Furthermore, reports showed that p53 activation is able to inhibit the activity of mTOR through a pathway involving the subsequent activation of TSC gene products TSC1 and TSC2, which are tumour suppressors and negative regulators of mTOR [78, 103–105].”
  • PRKAB1 is targeted by p53 and encodes for AMP-activated protein kinase beta-1 subunit, which is involved in phosphorylation and inactivation of acetyl-coenzyme A carboxylase and β-hydroxy β-methylglutaryl-coenzyme A reductase, key enzymes involved in regulating de novo biosynthesis of fatty acids and cholesterol.

    “PRKAB1 is also targeted by p53 and encodes for AMP-activated protein kinase beta-1 subunit, which is involved in phosphorylation and inactivation of acetyl-coenzyme A carboxylase and β-hydroxy β-methylglutaryl-coenzyme A reductase, key enzymes involved in regulating de novo biosynthesis of fatty acids and cholesterol.201”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [201]

  • AMPK, which p53 activates by direct activation of PRKAB1, blocks the mammalian target of rapamycin (mTOR) pathway, and leads to autophagy.

    “AMPK, which p53 activates by direct activation of PRKAB1, blocks the mammalian target of rapamycin (mTOR) pathway, and leads to autophagy.201, 210”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [201]

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Authors
Feng, Z., Hu, W., de Stanchina, E., Teresky, A. K., Jin, S., Lowe, S., & Levine, A. J.
Affiliations
  • Rutgers Cancer Institute (US)
  • 2Cold Spring Harbor Laboratories, Cold Spring Harbor, New York; and
  • Cold Spring Harbor Laboratory (US)
  • Institute for Advanced Study (US)
Venue
Cancer Research
Published
2007-04-01
Volume
67
Issue
7
Pages
3043-3053
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2101428185
Cited by
633
References
50
Citations by year
2026: 8 · 2025: 24 · 2024: 22 · 2023: 22 · 2022: 29 · 2021: 48 · 2020: 36 · 2019: 47 · 2018: 45 · 2017: 34 · 2016: 36 · 2015: 32 · 2014: 35 · 2013: 44 · 2012: 44
FWCI
13.30
Type
journal article
Language
en
Open access
closed
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
Funders
National Cancer Institute (P30CA008748)
Topics
  • 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
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
p53, TSC2, PTEN, IGFBP-3, glucose deprivation, p53 phosphorylation, apoptosis, cell cycle arrest, tissue-specific gene regulation, mouse embryonic fibroblasts, stress signaling
MeSH terms
Tuberous Sclerosis Complex 2 Protein, Animals, Cell Transformation, Neoplastic, Female, Glucose, Humans, Insulin-Like Growth Factor I, Male, Mice, Inbred C57BL, Multienzyme Complexes, Organ Specificity, Protein Kinases, Signal Transduction, Gene Expression Regulation, Neoplastic, Tumor Suppressor Protein p53, Apoptosis, Protein Serine-Threonine Kinases, Adenovirus E1B Proteins, Mice, Knockout, ras Proteins, Insulin-Like Growth Factor Binding Proteins, Tumor Suppressor Proteins, Cell Line, Tumor, Proto-Oncogene Proteins c-akt, PTEN Phosphohydrolase, Mice, AMP-Activated Protein Kinases, TOR Serine-Threonine Kinases

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