Cited by 124Telomeres, Telomerase, and SenescenceCancer-related Molecular PathwaysGenetics, Aging, and Longevity in Model Organisms

Small-molecule MDM2 antagonists attenuate the senescence-associated secretory phenotype

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Wiley, Christopher D., Schaum, Nicholas, Alimirah, Fatouma, Lopez-Dominguez, Jose Alberto, Orjalo, Arturo V., Scott, Gary, Desprez, Pierre-Yves, Benz, Christopher +2 more·2018·Scientific Reports

Abstract

Processes that have been linked to aging and cancer include an inflammatory milieu driven by senescent cells. Senescent cells lose the ability to divide, essentially irreversibly, and secrete numerous proteases, cytokines and growth factors, termed the senescence-associated secretory phenotype (SASP). Senescent cells that lack p53 tumor suppressor function show an exaggerated SASP, suggesting the SASP is negatively controlled by p53. Here, we show that increased p53 activity caused by small molecule inhibitors of MDM2, which promotes p53 degradation, reduces inflammatory cytokine production by senescent cells. Upon treatment with the MDM2 inhibitors nutlin-3a or MI-63, human cells acquired a senescence-like growth arrest, but the arrest was reversible. Importantly, the inhibitors reduced expression of the signature SASP factors IL-6 and IL-1α by cells made senescent by genotoxic stimuli, and suppressed the ability of senescent fibroblasts to stimulate breast cancer cell aggressiveness. Our findings suggest that MDM2 inhibitors could reduce cancer progression in part by reducing the pro-inflammatory environment created by senescent cells.

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Authors
Wiley, C. D., Schaum, N., Alimirah, F., Lopez-Dominguez, J. A., Orjalo, A. V., Scott, G., Desprez, P.-Y., Benz, C., Davalos, A. R., & Campisi, J.
Affiliations
Buck Institute for Research on Aging (US)
Corresponding author
  • Davalos, Albert R.
  • Campisi, Judith
Venue
Scientific Reports
Published
2018-02-05
Volume
8
Issue
1
Pages
2410-2410
ISSN
2045-2322 (ISSN-L)
OpenAlex
W2802384001
Cited by
124
References
55
Citations by year
2026: 10 · 2025: 10 · 2024: 13 · 2023: 8 · 2022: 25 · 2021: 25 · 2020: 20 · 2019: 8 · 2018: 5
FWCI
9.97
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (AG09909, AG017242)
  • National Institute on Aging (R56AG009909, R37AG009909, P01AG017242)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
MDM2 inhibitors, senescence-associated secretory phenotype, cellular senescence, p53, Nutlin-3a, interleukin-6, IL-1α, inflammation, breast cancer progression, genotoxic stress, aging
MeSH terms
Interleukin-6 Inhibitors, Cell Line, Enzyme Inhibitors, Epithelial Cells, Fibroblasts, Gamma Rays, Humans, Imidazoles, Indoles, Lung, Male, Piperazines, Spiro Compounds, Interleukin-6, Tumor Suppressor Protein p53, Cellular Senescence, Proto-Oncogene Proteins c-mdm2, Foreskin, Interleukin-1alpha, Cell Cycle Checkpoints

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