Cited by 521Cancer-related Molecular PathwaysCell death mechanisms and regulationUbiquitin and proteasome pathways

The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.

Rescue of embryonic lethality in Mdm4-null mice by loss of Trp53 suggests a nonoverlapping pathway with MDM2 to regulate p53

Abstract

The p53 protein can inhibit cell cycling or induce apoptosis, and is thus a critical regulator of tumorigenesis. This protein is negatively regulated by a physical interaction with MDM2, an E3 ubiquitin ligase. This interaction is critical for cell viability; loss of Mdm2 causes cell death in vitro and in vivo in a p53-dependent manner. The recently discovered MDM2-related protein MDM4 (also known as MDMX) has some of the same properties as MDM2. MDM4 binds and inhibits p53 transcriptional activity in vitro. Unlike MDM2, however, MDM4 does not cause nuclear export or degradation of p53 (refs. 9,10). To study MDM4 function in vivo, we deleted Mdm4 in mice. Mdm4-null mice died at 7.5-8.5 dpc, owing to loss of cell proliferation and not induction of apoptosis. To assess the importance of p53 in the death of Mdm4-/- embryos, we crossed in the Trp53-null allele. The loss of Trp53 completely rescued the Mdm4-/- embryonic lethality. Thus, MDM2 and MDM4 are nonoverlapping critical regulators of p53 in vivo. These data define a new pathway of p53 regulation and raise the possibility that increased MDM4 levels and the resulting inactivation of p53 contribute to the development of human tumors.

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Crossref · 10.1038/ng714

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Metadata

Authors
Parant, J., Chavez-Reyes, A., Little, N. A., Yan, W., Reinke, V., Jochemsen, A. G., & Lozano, G.
Affiliations
  • The University of Texas MD Anderson Cancer Center (US)
  • Leiden University Medical Center (NL)
Corresponding author
Lozano, Guillermina
Venue
Nature Genetics
Published
2001-08-20
Volume
29
Issue
1
Pages
92-95
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W1598779357
Cited by
517
References
19
Citations by year
2026: 4 · 2025: 8 · 2024: 15 · 2023: 15 · 2022: 13 · 2021: 20 · 2020: 20 · 2019: 14 · 2018: 15 · 2017: 22 · 2016: 34 · 2015: 14 · 2014: 35 · 2013: 18 · 2012: 23
FWCI
7.94
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
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 › Ubiquitin and proteasome pathways
Keywords
MDM4, MDM2, p53 regulation, Trp53, embryonic lethality, cell proliferation, E3 ubiquitin ligase, tumor suppressor, p53 inactivation
MeSH terms
Animals, Base Sequence, Embryo, Mammalian, Genes, Lethal, Nuclear Proteins, Precipitin Tests, Proto-Oncogene Proteins, Blotting, Western, Polymerase Chain Reaction, Genes, p53, Tumor Suppressor Protein p53, DNA Primers, Mice, Knockout, In Situ Nick-End Labeling, Mice, Proto-Oncogene Proteins c-mdm2

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