ZRF1 controls oncogene-induced senescence through the INK4-ARF locus
Abstract
The reactivation of the INK4-ARF locus, which is epigenetically repressed by Polycomb proteins in healthy cells, is a hallmark of senescence. One mechanism of reactivating Polycomb-silenced genes is mediated by the epigenetic factor ZRF1, which associates with ubiquitinated histone H2A. We show that cells undergoing senescence following oncogenic Ras expression have increased ZRF1 levels, and that this binds to the p15INK4b, ARF and p16INK4a promoters. Furthermore, ZRF1 depletion in oncogenic Ras-expressing cells restores proliferation by preventing Arf and p16Ink4a expression, consequently bypassing senescence. Thus, ZRF1 regulates the INK4-ARF locus during cellular proliferation and senescence, and alterations in ZRF1 may contribute to tumorigenesis.
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OIS is characterized by the upregulation of CDK inhibitors, including p15INK4B, p16INK4A, p21CIP1, and an increased senescence-associated β-galactosidase (SA-β-Gal) activity.
“It is characterized by the upregulation of CDK inhibitors, including p15INK4B, p16INK4A, p21CIP1, and an increased senescence-associated β-galactosidase (SA-β-Gal) activity.285,286”
From Inflammation and aging: signaling pathways and intervention therapies (2023) · cites this paper as [285]
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- Authors
- Ribeiro, J. D., Morey, L., Mas, A., Gutierrez, A., Luis, N. M., Mejetta, S., Richly, H., Benitah, S. A., Keyes, W. M., & Di Croce, L.
- Affiliations
- Universitat Pompeu Fabra (ES)
- Institució Catalana de Recerca i Estudis Avançats (ES)
- Venue
- Oncogene
- Published
- 2012-06-25
- Volume
- 32
- Issue
- 17
- Pages
- 2161-2168
- ISSN
- 0950-9232 (ISSN-L)
- 1476-5594
- OpenAlex
- W2043390820
- Cited by
- 41
- References
- 40
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 1 · 2023: 5 · 2022: 2 · 2021: 6 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 2 · 2015: 3 · 2014: 7 · 2013: 1
- FWCI
- 2.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Oncogene (publishedVersion)
- PubMed (publishedVersion)
- Funders
- European Commission
- Topics
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Keywords
- oncogene-induced senescence, INK4/ARF locus, Polycomb group proteins, epigenetic repression, CDKN2B, ARF, p16INK4a, oncogenic Ras, senescence bypass, carcinogenesis, cell proliferation
- MeSH terms
- Animals, Cell Differentiation, Cell Line, Cell Transformation, Neoplastic, DNA-Binding Proteins, Humans, Mice, Inbred C57BL, Genes, ras, Tretinoin, Oncogene Proteins, Gene Expression Regulation, Neoplastic, RNA-Binding Proteins, Cellular Senescence, Cell Cycle Proteins, Molecular Chaperones, Cyclin-Dependent Kinase Inhibitor p16, Gene Silencing, Cell Proliferation, Mice
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