Cited by 148Cancer-related Molecular PathwaysHeat shock proteins researchPI3K/AKT/mTOR signaling in cancer

The human oncoprotein MDM2 arrests the cell cycle: elimination of its cell-cycle-inhibitory function induces tumorigenesis

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Brown, Doris R., Thomas, Charles A., Palit Deb, Swati·1998·The EMBO Journal

Abstract

The human oncoprotein MDM2 (hMDM2) overexpresses in various human tumors. If amplified, the mdm2 gene can enhance the tumorigenic potential of murine cells. Here, we present evidence to show that the full-length human or mouse MDM2 expressed from their respective cDNA can inhibit the G0/G1-S phase transition of NIH 3T3 and normal human diploid cells. The protein harbors more than one cell-cycle-inhibitory domain that does not overlap with the p53-interaction domain. Deletion mutants of hMDM2 that lack the cell-cycle-inhibitory domains can be stably expressed in NIH 3T3 cells, enhancing their tumorigenic potential. The tumorigenic domain of hMDM2 overlaps with the p53-interaction domain. Some tumor-derived cells, such as Saos-2, H1299 or U-2OS, are relatively insensitive to the growth-inhibitory effects of hMDM2. These observations suggest that hMDM2 overexpression in response to oncogenic stimuli would induce growth arrest in normal cells. Elimination or inactivation of the hMDM2-induced G0/G1 arrest may contribute to one of the steps of tumorigenesis.

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Authors
Brown, D. R., Thomas, C. A., & Palit Deb, S.
Affiliations
The University of Texas at San Antonio Health Science Center (US)
Venue
The EMBO Journal
Published
1998-05-01
Volume
17
Issue
9
Pages
2513-2525
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2014749419
Cited by
148
References
78
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 1 · 2019: 3 · 2018: 3 · 2017: 4 · 2016: 3 · 2015: 4 · 2014: 6 · 2013: 4 · 2012: 14
FWCI
4.24
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA070712, CA70712)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
MDM2, oncoprotein, cell cycle arrest, G0/G1 arrest, carcinogenesis, deletion mutants, NIH3T3 cells, cancer cell lines, oncogene overexpression, growth inhibition
MeSH terms
Animals, Cell Cycle, Cell Division, Cell Line, Cell Transformation, Neoplastic, Flow Cytometry, Gene Amplification, Humans, Neoplasm Proteins, Nuclear Proteins, Proto-Oncogene Proteins, Recombinant Proteins, Transfection, Resting Phase, Cell Cycle, G1 Phase, S Phase, Mutagenesis, Site-Directed, 3T3 Cells, Sequence Deletion, Mice, Proto-Oncogene Proteins c-mdm2

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