Cited by 95Cancer-related Molecular PathwaysRedox biology and oxidative stressDNA Repair Mechanisms

Activation of p53 by Oxidative Stress Involves Platelet-derived Growth Factor-β Receptor-mediated Ataxia Telangiectasia Mutated (ATM) Kinase Activation

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Chen, Kai, Albano, Adam, Ho, Alan, Keaney, John F.·2003·Journal of Biological Chemistry

Abstract

Phosphorylation of the p53 tumor suppressor protein is a critical event in the up-regulation and activation of p53 during cellular stress. In this study, we characterized the signaling pathway linking oxidative stress to p53 through the platelet-derived growth factor beta (PDGF beta) receptor and the ataxia telangiectasia mutated (ATM) kinase. In response to H2O2, we observed phosphorylation of p53 specifically at serine 15, but not serine 9, 20, or 392. Phosphorylation of Ser-15 was correlated with enhanced induction and functional activation of p53 manifest as transcription of the p53 target p21CIP/WAF. We found that H2O2 induced phosphorylation of the PDGF beta receptor and increased ATM kinase activity, two events integral to p53 activation as either AG1433 (a PDGF beta receptor inhibitor) or caffeine (an ATM kinase inhibitor) inhibited Ser-15 phosphorylation. Similarly, p53 activation by H2O2 was inhibited by kinase-inactive forms of the PDGF beta receptor or ATM. Inhibition of ATM kinase had no effect on H2O2-induced PDGF beta receptor tyrosine phosphorylation, whereas PDGF beta receptor suppression with RNA interference impaired H2O2-induced ATM activation, indicating that ATM lies downstream to the PDGF beta receptor in this signaling cascade. Functionally, inhibition of the PDGF beta receptor abrogated the inhibition of cell proliferation, and promotion of apoptosis due to H2O2 treatment. Thus, these data link PDGF beta receptor transactivation to H2O2-induced p53 phosphorylation and suggest a functional role for growth factor receptors in modulation of p53 function.

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Crossref · 10.1074/jbc.m304423200

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Authors
Chen, K., Albano, A., Ho, A., & Keaney, J. F.
Affiliations
Boston University (US)
Corresponding author
Keaney, John F.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2003-10
Volume
278
Issue
41
Pages
39527-39533
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2026254485
Cited by
95
References
45
Citations by year
2024: 3 · 2023: 2 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 3 · 2015: 3 · 2014: 4 · 2013: 6 · 2012: 8
FWCI
4.48
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01dk055656-03)
  • National Heart, Lung, and Blood Institute (P01HL060886, HL-60886)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-55656)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
p53 activation, oxidative stress, hydrogen peroxide, PDGF receptor beta, ATM kinase, p53 Ser15 phosphorylation, p21, apoptosis, cell proliferation, signaling pathways
MeSH terms
Animals, Base Sequence, Binding Sites, Cells, Cultured, DNA, DNA-Binding Proteins, Enzyme Activation, Humans, Hydrogen Peroxide, Phosphorylation, Signal Transduction, Transcriptional Activation, Tumor Suppressor Protein p53, 3T3 Cells, Protein Serine-Threonine Kinases, Oxidative Stress, Cell Cycle Proteins, Phosphatidylinositol 3-Kinases, Receptor, Platelet-Derived Growth Factor beta, Mitogen-Activated Protein Kinases, Tumor Suppressor Proteins, RNA Interference, p38 Mitogen-Activated Protein Kinases, Mice, Ataxia Telangiectasia Mutated Proteins

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