Cited by 133Cancer-related Molecular PathwaysCell death mechanisms and regulationPI3K/AKT/mTOR signaling in cancer

Acquisition of p53 mutations in response to the non-genotoxic p53 activator Nutlin-3

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Aziz, M H, Shen, H, Maki, C G·2011·Oncogene

Abstract

Wild-type p53 is a stress-responsive tumor suppressor and potent growth inhibitor. Genotoxic stresses (for example, ionizing and ultraviolet radiation or chemotherapeutic drug treatment) can activate p53, but also induce mutations in the P53 gene, and thus select for p53-mutated cells. Nutlin-3a (Nutlin) is pre-clinical drug that activates p53 in a non-genotoxic manner. Nutlin occupies the p53-binding pocket of murine double minute 2 (MDM2), activating p53 by blocking the p53-MDM2 interaction. Because Nutlin neither binds p53 directly nor introduces DNA damage, we hypothesized Nutlin would not induce P53 mutations, and, therefore, not select for p53-mutated cells. To test this, populations of SJSA-1 (p53 wild-type) cancer cells were expanded that survived repeated Nutlin exposures, and individual clones were isolated. Group 1 clones were resistant to Nutlin-induced apoptosis, but still underwent growth arrest. Surprisingly, while some Group 1 clones retained wild-type p53, others acquired a heterozygous p53 mutation. Apoptosis resistance in Group 1 clones was associated with decreased PUMA induction and decreased caspase 3/7 activation. Group 2 clones were resistant to both apoptosis and growth arrest induced by Nutlin. Group 2 clones had acquired mutations in the p53-DNA-binding domain and expressed only mutant p53s that were induced by Nutlin treatment, but were unable to bind the P21 and PUMA gene promoters, and unable to activate transcription. These results demonstrate that non-genotoxic p53 activation (for example, by Nutlin treatment) can lead to the acquisition of somatic mutations in p53 and select for p53-mutated cells. These findings have implications for the potential clinical use of Nutlin and other small molecule MDM2 antagonists.

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  • Cancers can develop resistance to drugs that destroy them and can acquire compensatory TP53 mutations.

    “cancers have a unique ability to develop resistance to drugs that cause their destruction and subsequently acquired compensatory TP53 mutations (Aziz, et al., 2011; Michaelis, et al., 2011)”

    From The Mdm network and its regulation of p53 activities: a rheostat of cancer risk (2014) · cites this paper as Aziz, et al., 2011

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Authors
Aziz, M. H., Shen, H., & Maki, C. G.
Affiliations
Rush University Medical Center (US)
Corresponding author
Maki, C G
Venue
Oncogene
Published
2011-06-06
Volume
30
Issue
46
Pages
4678-4686
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W1990054550
Cited by
131
References
36
Citations by year
2026: 3 · 2025: 5 · 2024: 5 · 2023: 8 · 2022: 1 · 2021: 10 · 2020: 8 · 2019: 17 · 2018: 7 · 2017: 8 · 2016: 12 · 2015: 10 · 2014: 19 · 2013: 8 · 2012: 7
FWCI
5.82
Type
journal article
Language
en
Open access
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5r01ca137598-05)
  • National Cancer Institute (R01 CA137598, 1R01CA137598-01A1)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
TP53 mutation, Nutlin-3, MDM2 inhibitors, apoptosis resistance, PUMA, caspase-3/7 activation, p53 DNA-binding domain, p53 transcriptional activation, MDM2, tumor suppressor
MeSH terms
Bone Neoplasms, Clone Cells, Humans, Imidazoles, Mutation, Piperazines, Protein Binding, Osteosarcoma, Tumor Suppressor Protein p53, Apoptosis, Cell Line, Tumor, Proto-Oncogene Proteins c-mdm2

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