Cited by 1,967Cancer-related Molecular PathwaysPI3K/AKT/mTOR signaling in cancerUbiquitin and proteasome pathways

The p53 pathway: positive and negative feedback loops

Harris, Sandra L, Levine, Arnold J·2005·Oncogene

Abstract

The p53 pathway responds to stresses that can disrupt the fidelity of DNA replication and cell division. A stress signal is transmitted to the p53 protein by post-translational modifications. This results in the activation of the p53 protein as a transcription factor that initiates a program of cell cycle arrest, cellular senescence or apoptosis. The transcriptional network of p53-responsive genes produces proteins that interact with a large number of other signal transduction pathways in the cell and a number of positive and negative autoregulatory feedback loops act upon the p53 response. There are at least seven negative and three positive feedback loops described here, and of these, six act through the MDM-2 protein to regulate p53 activity. The p53 circuit communicates with the Wnt-beta-catenin, IGF-1-AKT, Rb-E2F, p38 MAP kinase, cyclin-cdk, p14/19 ARF pathways and the cyclin G-PP2A, and p73 gene products. There are at least three different ubiquitin ligases that can regulate p53 in an autoregulatory manner: MDM-2, Cop-1 and Pirh-2. The meaning of this redundancy and the relative activity of each of these feedback loops in different cell types or stages of development remains to be elucidated. The interconnections between signal transduction pathways will play a central role in our understanding of cancer.

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Crossref · 10.1038/sj.onc.1208615

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76 of 76 references verified0 citation errors · 0 not checkable

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  • Increased expression of GOF mut-p53 is due to disruption of the MDM2/p53 negative feedback loop.

    “Increased expression of GOF mut-p53 is due to the disruption of the MDM2/p53 negative feedback loop.”

    From The p53 Pathway in Glioblastoma (2018) · cites this paper as [64]

  • Through activation of its target genes, p53 activates several feedback loops, both positive and negative.

    “Through activation of its target genes, p53 activates several feedback loops, both positive and negative.216”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [216]

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Authors
Harris, S. L., & Levine, A. J.
Affiliations
Rutgers Cancer Institute (US)
Corresponding author
Levine, Arnold J
Venue
Oncogene
Published
2005-04-18
Volume
24
Issue
17
Pages
2899-2908
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2008887283
Cited by
1,967
References
76
Citations by year
2026: 24 · 2025: 60 · 2024: 62 · 2023: 69 · 2022: 108 · 2021: 110 · 2020: 74 · 2019: 64 · 2018: 70 · 2017: 97 · 2016: 76 · 2015: 75 · 2014: 90 · 2013: 82 · 2012: 85
FWCI
14.30
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Breast Cancer Research Foundation
  • National Institutes of Health
  • National Cancer Institute (CA-87497, P01CA087497)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
p53 pathway, autoregulatory loop, MDM2, cell cycle arrest, cellular senescence, apoptosis, Wnt/β-catenin signaling, p38 MAPK, protein phosphatase 2A, p73, ubiquitin ligase, DNA damage response, signaling crosstalk, cancer
MeSH terms
Amino Acid Sequence, Animals, Feedback, Humans, Signal Transduction, Tumor Suppressor Protein p53

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