Cited by 634Cancer-related Molecular PathwaysDNA Repair MechanismsMicrotubule and mitosis dynamics

GADD45 induction of a G 2 /M cell cycle checkpoint

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Wang, Xin Wei, Zhan, Qimin, Coursen, Jill D., Khan, Mohammed A., Kontny, H. Udo, Yu, Lijia, Hollander, M. Christine, O’Connor, Patrick M. +2 more·1999·Proceedings of the National Academy of Sciences

Abstract

G 1 /S and G 2 /M cell cycle checkpoints maintain genomic stability in eukaryotes in response to genotoxic stress. We report here both genetic and functional evidence of a Gadd45-mediated G 2 /M checkpoint in human and murine cells. Increased expression of Gadd45 via microinjection of an expression vector into primary human fibroblasts arrests the cells at the G 2 /M boundary with a phenotype of MPM2 immunopositivity, 4 n DNA content and, in 15% of the cells, centrosome separation. The Gadd45-mediated G 2 /M arrest depends on wild-type p53, because no arrest was observed either in p53-null Li–Fraumeni fibroblasts or in normal fibroblasts coexpressed with p53 mutants. Increased expression of cyclin B1 and Cdc25C inhibited the Gadd45-mediated G 2 /M arrest in human fibroblasts, indicating that the mechanism of Gadd45-mediated G 2 /M checkpoint is at least in part through modulation of the activity of the G 2 -specific kinase, cyclin B1/p34 cdc2 . Genetic and physiological evidence of a Gadd45-mediated G 2 /M checkpoint was obtained by using GADD45 -deficient human or murine cells. Human cells with endogenous Gadd45 expression reduced by antisense GADD45 expression have an impaired G 2 /M checkpoint after exposure to either ultraviolet radiation or methyl methanesulfonate but are still able to undergo G 2 arrest after ionizing radiation. Lymphocytes from gadd45 -knockout mice ( gadd45 −/−) also retained a G 2 /M checkpoint initiated by ionizing radiation and failed to arrest at G 2 /M after exposure to ultraviolet radiation. Therefore, the mammalian genome is protected by a multiplicity of G 2 /M checkpoints in response to specific types of DNA damage.

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Crossref · 10.1073/pnas.96.7.3706

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  • GADD45A can induce G2/M cell cycle arrest.

    “The p53 target genes BTG236, 154, 155 and GADD45A13, 156 can also induce G1/S and G2/M cell cycle arrest, respectively.”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [156]

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Authors
Wang, X. W., Zhan, Q., Coursen, J. D., Khan, M. A., Kontny, H. U., Yu, L., Hollander, M. C., O’Connor, P. M., Fornace, A. J., & Harris, C. C.
Affiliations
  • National Institutes of Health (US)
  • Laboratory of Human Carcinogenesis, Laboratory of Biological Chemistry, and Laboratory of Molecular Pharmacology, Division of Basic Science, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
Venue
Proceedings of the National Academy of Sciences
Published
1999-03-30
Volume
96
Issue
7
Pages
3706-3711
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2062674518
Cited by
634
References
69
Citations by year
2026: 9 · 2025: 11 · 2024: 17 · 2023: 12 · 2022: 16 · 2021: 16 · 2020: 13 · 2019: 15 · 2018: 23 · 2017: 21 · 2016: 18 · 2015: 24 · 2014: 14 · 2013: 20 · 2012: 24
FWCI
16.27
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • FreiDok plus (Universitätsbibliothek Freiburg) (submittedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
GADD45, G2/M checkpoint, cell cycle checkpoints, p53, cyclin B1, Cdc25C, genotoxic stress, DNA damage response, ultraviolet radiation, methyl methanesulfonate, ionizing radiation, centrosome separation, genome stability, human fibroblasts
MeSH terms
GADD45 Proteins, Animals, Cell Cycle, Cell Line, Colonic Neoplasms, DNA Damage, DNA-Binding Proteins, Fibroblasts, Humans, Lymphocytes, Mice, Inbred Strains, Mitosis, Proteins, Recombinant Proteins, Spleen, Transfection, Tumor Cells, Cultured, Genes, p53, G2 Phase, Cyclins, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Tumor Suppressor Proteins, Intracellular Signaling Peptides and Proteins, Cyclin-Dependent Kinase Inhibitor p21, Mice, Ataxia Telangiectasia Mutated Proteins

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