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Rescue of embryonic lethality in Mdm2-deficient mice by absence of p53
Abstract
The Mdm2 proto-oncogene was originally identified as one of several genes contained on a mouse double minute chromosome present in a transformed derivative of 3T3 cells. Overexpression of Mdm2 can immortalize primary cultures of rodent fibroblasts. Human MDM2 is amplified in 30-40% of sarcomas, and is overexpressed in leukaemic cells. The Mdm2 oncoprotein forms a complex with the p53 tumour-suppressor protein and inhibits p53-mediated transregulation of gene expression. Because Mdm2 expression increases in response to p53, Mdm2-p53 binding may autoregulate Mdm2 expression and modulate the activity of p53 in the cell. We have created Mdm2-null and Mdm2/p53-null mice to determine whether Mdm2 possesses developmental functions in addition to the ability to complex with p53, and to investigate the biological role of Mdm2-p53 complex formation in development. Mice deficient for Mdm2 die early in development. In contrast, mice deficient for both Mdm2 and p53 develop normally and are viable. These results suggest that a critical role of Mdm2 in development is the regulation of p53 function.
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“Loss of Mdm2 leads to cell death by apoptosis and embryonic lethality at the blastocyst stage, and this phenotype is completely rescued by concomitant deletion of p53 (Chavez-Reyes, et al., 2003; Jones, et al., 1995; Montes de Oca Luna, et al., 1995).”
From The Mdm network and its regulation of p53 activities: a rheostat of cancer risk (2014) · cites this paper as Jones, et al., 1995
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Metadata
- Authors
- Jones, S. N., Roe, A. E., Donehower, L. A., & Bradley, A.
- Affiliations
- Howard Hughes Medical Institute (US)
- Baylor College of Medicine (US)
- ORCID
- Bradley, Allan
- Venue
- Nature
- Published
- 1995-11
- Volume
- 378
- Issue
- 6553
- Pages
- 206-208
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W1993864973
- Semantic Scholar
- efc84bf5f5d1747443a3eb4555f9b5ede31b368f
- Cited by
- 1,280
- References
- 24
- Citations by year
- 2026: 9 · 2025: 17 · 2024: 30 · 2023: 31 · 2022: 28 · 2021: 35 · 2020: 41 · 2019: 28 · 2018: 31 · 2017: 38 · 2016: 54 · 2015: 34 · 2014: 59 · 2013: 30 · 2012: 60
- FWCI
- 14.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
- Keywords
- MDM2, p53, embryonic lethality, developmental regulation, tumor suppressor, sarcoma, leukemia
- MeSH terms
- Proto-Oncogene Mas, Animals, Base Sequence, Cell Cycle, Cell Line, Crosses, Genetic, Female, Embryonic and Fetal Development, Genes, Lethal, Molecular Sequence Data, Mutation, Nuclear Proteins, Proto-Oncogene Proteins, Tumor Suppressor Protein p53, 3T3 Cells, DNA Primers, Gene Targeting, Mice, Proto-Oncogene Proteins c-mdm2
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