Base excision DNA repair defect in Gadd45a-deficient cells

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

doi:10.1038/sj.onc.1210557

Base excision DNA repair defect in Gadd45a-deficient cells

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

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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 language	English
Pages (from-to)	7517-7525
Number of pages	9
Journal	Oncogene
Volume	26
Issue number	54
DOIs	https://doi.org/10.1038/sj.onc.1210557
Publication status	Published - 2007 Nov 29

Bibliographical note

Funding Information:
We thank Dr M Christine Hollander, NIH, Bethesda, MD for gadd45a + / + and gadd45a−/− MEF cells. We also thank Byung J Kim, Jeong Won Hwang and Ju Han Lee for helping with the illustration work. This work was partially supported by a grant of the Korea Health 21 R&D Project (03-PJ1-PG3-20800-0011) , Ministry of Health and Welfare, by the grant of the Eco-technopia 21 project (2004–9001–25–2) of Ministry of Environment, and by a grant no. R13-2002-020-01005-0 from the Korea Science and Engineering Foundation, Republic of Korea.

Keywords

APE1/Ref1
Base excision repair
Gadd45a
PCNA

ASJC Scopus subject areas

Molecular Biology
Genetics
Cancer Research

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1038/sj.onc.1210557

Cite this

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title = "Base excision DNA repair defect in Gadd45a-deficient cells",

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.",

keywords = "APE1/Ref1, Base excision repair, Gadd45a, PCNA",

author = "Jung, {H. J.} and Kim, {E. H.} and Mun, {J. Y.} and S. Park and Smith, {M. L.} and Han, {S. S.} and Seo, {Y. R.}",

note = "Funding Information: We thank Dr M Christine Hollander, NIH, Bethesda, MD for gadd45a + / + and gadd45a−/− MEF cells. We also thank Byung J Kim, Jeong Won Hwang and Ju Han Lee for helping with the illustration work. This work was partially supported by a grant of the Korea Health 21 R&D Project (03-PJ1-PG3-20800-0011) , Ministry of Health and Welfare, by the grant of the Eco-technopia 21 project (2004–9001–25–2) of Ministry of Environment, and by a grant no. R13-2002-020-01005-0 from the Korea Science and Engineering Foundation, Republic of Korea.",

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AU - Kim, E. H.

AU - Mun, J. Y.

AU - Park, S.

AU - Smith, M. L.

AU - Han, S. S.

AU - Seo, Y. R.

N1 - Funding Information: We thank Dr M Christine Hollander, NIH, Bethesda, MD for gadd45a + / + and gadd45a−/− MEF cells. We also thank Byung J Kim, Jeong Won Hwang and Ju Han Lee for helping with the illustration work. This work was partially supported by a grant of the Korea Health 21 R&D Project (03-PJ1-PG3-20800-0011) , Ministry of Health and Welfare, by the grant of the Eco-technopia 21 project (2004–9001–25–2) of Ministry of Environment, and by a grant no. R13-2002-020-01005-0 from the Korea Science and Engineering Foundation, Republic of Korea.

PY - 2007/11/29

Y1 - 2007/11/29

N2 - 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.

AB - 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.

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ER -

Base excision DNA repair defect in Gadd45a-deficient cells

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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