Cited by 623Cancer-related Molecular PathwaysHeat shock proteins researchPI3K/AKT/mTOR signaling in cancer

Signaling to p53

Open access
Prives, Carol·1998·Cell

Abstract

The p53 tumor suppressor protein transmits signals arising from various forms of cellular stress, including DNA damage, hypoxia, and nucleotide deprivation, to genes and factors that induce cell cycle arrest and cell death. We can thus define events as being upstream or downstream of p53. The endpoint of the upstream component of this pathway is that levels of the p53 protein are dramatically increased through posttranscriptional mechanisms, often by one or two orders of magnitude. There is also evidence that in addition to elevating p53 levels, such signals convert the protein from an inert form to one that is activated for sequence-specific transcriptional activation (reviewed in Ko and Prives 1996). Stress signals are not the only means by which p53 becomes stabilized. The DNA viruses SV40 and adenovirus encode gene products, T antigen and E1a, respectively, that lead to increased quantities of p53 protein in cells. Moreover, under some conditions expression of cellular factors such as Myc or Ras can also result in p53 induction. Although this might seem at odds with the outcome of transformation caused by viral or cellular oncogenes, viruses and cells have evolved several ways to counteract the growth suppression functions of induced p53. The downstream component of the p53 pathway has been relatively well explored, and many transcriptional targets of p53 have been identified and characterized, including the gene encoding the CDK inhibitor, p21. By contrast, the upstream component had been quite elusive until recently, and a number of significant breakthroughs have now provided insight into this aspect of p53. While there are likely to be multiple modes of induction of p53, current knowledge suggests that diverse upstream signals funnel into a single critical interaction, namely that between p53 and its negative regulator, MDM2.

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Crossref · 10.1016/s0092-8674(00)81774-2

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Authors
Prives, C.
Affiliations
Columbia University (US)
Corresponding author
Prives, Carol
Venue
Cell
Publisher
Elsevier BV
Published
1998-10
Volume
95
Issue
1
Pages
5-8
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2014170738
Cited by
623
References
25
Citations by year
2025: 4 · 2024: 3 · 2023: 4 · 2022: 6 · 2021: 6 · 2020: 9 · 2019: 6 · 2018: 9 · 2017: 11 · 2016: 8 · 2015: 13 · 2014: 18 · 2013: 8 · 2012: 12
FWCI
32.16
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
p53, tumor suppressor signaling, p53 stabilization, post-transcriptional regulation, DNA damage response, hypoxia, cell cycle arrest, apoptosis, p53 transcriptional activation, SV40 T antigen, adenovirus E1A, c-Myc, Ras, p21, MDM2, p53-MDM2 interaction
MeSH terms
Animals, Humans, Nuclear Proteins, Proto-Oncogene Proteins, Signal Transduction, Tumor Suppressor Protein p53, Cyclin-Dependent Kinase Inhibitor p16, Proto-Oncogene Proteins c-mdm2

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