Base excision DNA repair defect in Gadd45a-deficient cells

H. J. Jung, E. H. Kim, J. Y. Mun, S. Park, M. L. Smith, Sung Sik Han, Y. R. Seo

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

As one of a number of p53-regulated genes, Gadd45a (growth arrest and DNA damage inducible gene) has been shown to delay carcinogenesis and decrease mutation frequency. Gadd45a is known to regulate nucleotide excision DNA repair (NER) in response to UV radiation. Here, we report an emerging role for Gadd45a in base excision repair (BER). Gadd45a-null mouse embryo fibroblasts MEF and gadd45a-deficient human colon cancer cells exhibited slow BER after treatment with methyl methanesulfonate (MMS) a pure base-damaging agent. In addition, removal of AP sites by apurinic/apyrimidinic endonuclease 1/redox factor 1 (APE1/Ref1) was significantly delayed in gadd45a-null cells. Moreover, the localization of APE1/Ref1 within the nucleus was observed in gadd45a wild-type cells, whereas APE1 become mainly distributed in the cytoplasm, and there is a reduced interaction with proliferating cell nuclear antigen (PCNA) in Gadd45a-deficient cells. Inasmuch as p53 has been shown to regulate BER in addition to the NER pathway, our data suggest that p53-regulated gene Gadd45a contributes to the BER response by affecting the interaction of cellular APE1/Ref1 with PCNA. Gadd45a might be a key component gene of the p53 pathway involved in protection from carcinogenic base damage and maintenance of genomic stability, although the downstream mechanism including APE1/Ref1 will need further study.

Original languageEnglish
Pages (from-to)7517-7525
Number of pages9
JournalOncogene
Volume26
Issue number54
DOIs
Publication statusPublished - 2007 Nov 29

Fingerprint

DNA Repair
Oxidation-Reduction
Endonucleases
p53 Genes
Proliferating Cell Nuclear Antigen
DNA-(Apurinic or Apyrimidinic Site) Lyase
Gene Components
Methyl Methanesulfonate
Null Lymphocytes
Genomic Instability
Mutation Rate
Colonic Neoplasms
DNA Damage
Carcinogenesis
Cytoplasm
Embryonic Structures
Fibroblasts
Maintenance
Radiation
Growth

Keywords

  • APE1/Ref1
  • Base excision repair
  • Gadd45a
  • PCNA

ASJC Scopus subject areas

  • Molecular Biology
  • Cancer Research
  • Genetics

Cite this

Jung, H. J., Kim, E. H., Mun, J. Y., Park, S., Smith, M. L., Han, S. S., & Seo, Y. R. (2007). Base excision DNA repair defect in Gadd45a-deficient cells. Oncogene, 26(54), 7517-7525. https://doi.org/10.1038/sj.onc.1210557

Base excision DNA repair defect in Gadd45a-deficient cells. / Jung, H. J.; Kim, E. H.; Mun, J. Y.; Park, S.; Smith, M. L.; Han, Sung Sik; Seo, Y. R.

In: Oncogene, Vol. 26, No. 54, 29.11.2007, p. 7517-7525.

Research output: Contribution to journalArticle

Jung, HJ, Kim, EH, Mun, JY, Park, S, Smith, ML, Han, SS & Seo, YR 2007, 'Base excision DNA repair defect in Gadd45a-deficient cells', Oncogene, vol. 26, no. 54, pp. 7517-7525. https://doi.org/10.1038/sj.onc.1210557
Jung HJ, Kim EH, Mun JY, Park S, Smith ML, Han SS et al. Base excision DNA repair defect in Gadd45a-deficient cells. Oncogene. 2007 Nov 29;26(54):7517-7525. https://doi.org/10.1038/sj.onc.1210557
Jung, H. J. ; Kim, E. H. ; Mun, J. Y. ; Park, S. ; Smith, M. L. ; Han, Sung Sik ; Seo, Y. R. / Base excision DNA repair defect in Gadd45a-deficient cells. In: Oncogene. 2007 ; Vol. 26, No. 54. pp. 7517-7525.
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