A novel chemopreventive mechanism of selenomethionine

Enhancement of APE1 enzyme activity via a Gadd45a, PCNA and APE1 protein complex that regulates p53-mediated base excision repair

Hwa Jin Jung, Hye Lim Kim, Yeo Jin Kim, Jong Il Weon, Young Rok Seo

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Organic selenium compounds have been documented to play a role in cancer prevention. Our previous study showed that selenomethionine (SeMet) induces p53 activation without genotoxic effects including apoptosis and cell cycle arrest. In this study, we investigated the mechanism by which organic selenium compounds promote p53-mediated base excision repair (BER) activity. Our data demonstrated for the first time that the interaction between growth arrest and DNA damage-inducible protein 45A (Gadd45a), which is a p53-activated downstream gene, and two BER-mediated repair proteins, proliferating cell nuclear antigen (PCNA) and apurinic/apyrimidinic endonuclease (APE1/Ref-1), was significantly increased in a p53-dependent manner following treatment with organic selenium compounds. Furthermore, we observed that the activity of APE1 was significantly increased in a p53-dependent manner in response to the organic selenium compounds. These results suggest that BER activity is dependent on wild-type p53 activity and is mediated by the modulation of protein interactions between Gadd45a and repair proteins in response to organic selenium compounds. We propose that p53-dependent BER activity is a distinct chemopreventive mechanism mediated by organic selenium compounds, and that this may provide insight into the development of effective chemopreventive strategies against various oxidative stresses that contribute to a variety of human diseases, particularly cancer.

Original languageEnglish (US)
Pages (from-to)1581-1586
Number of pages6
JournalOncology Reports
Volume30
Issue number4
DOIs
StatePublished - Oct 2013

Fingerprint

Selenium Compounds
Selenomethionine
Proliferating Cell Nuclear Antigen
DNA Repair
DNA Damage
Enzymes
Growth
Proteins
DNA-(Apurinic or Apyrimidinic Site) Lyase
Cell Cycle Checkpoints
Neoplasms
Oxidative Stress
Apoptosis
Genes

Keywords

  • APE1/Ref-1
  • Base excision repair
  • Growth arrest and DNA damage-inducible protein 45A
  • Proliferating cell nuclear antigen
  • Selenomethionine

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

A novel chemopreventive mechanism of selenomethionine : Enhancement of APE1 enzyme activity via a Gadd45a, PCNA and APE1 protein complex that regulates p53-mediated base excision repair. / Jung, Hwa Jin; Kim, Hye Lim; Kim, Yeo Jin; Weon, Jong Il; Seo, Young Rok.

In: Oncology Reports, Vol. 30, No. 4, 10.2013, p. 1581-1586.

Research output: Contribution to journalArticle

@article{5a9a7224a601428e9a36b7ad7b73e24b,
title = "A novel chemopreventive mechanism of selenomethionine: Enhancement of APE1 enzyme activity via a Gadd45a, PCNA and APE1 protein complex that regulates p53-mediated base excision repair",
abstract = "Organic selenium compounds have been documented to play a role in cancer prevention. Our previous study showed that selenomethionine (SeMet) induces p53 activation without genotoxic effects including apoptosis and cell cycle arrest. In this study, we investigated the mechanism by which organic selenium compounds promote p53-mediated base excision repair (BER) activity. Our data demonstrated for the first time that the interaction between growth arrest and DNA damage-inducible protein 45A (Gadd45a), which is a p53-activated downstream gene, and two BER-mediated repair proteins, proliferating cell nuclear antigen (PCNA) and apurinic/apyrimidinic endonuclease (APE1/Ref-1), was significantly increased in a p53-dependent manner following treatment with organic selenium compounds. Furthermore, we observed that the activity of APE1 was significantly increased in a p53-dependent manner in response to the organic selenium compounds. These results suggest that BER activity is dependent on wild-type p53 activity and is mediated by the modulation of protein interactions between Gadd45a and repair proteins in response to organic selenium compounds. We propose that p53-dependent BER activity is a distinct chemopreventive mechanism mediated by organic selenium compounds, and that this may provide insight into the development of effective chemopreventive strategies against various oxidative stresses that contribute to a variety of human diseases, particularly cancer.",
keywords = "APE1/Ref-1, Base excision repair, Growth arrest and DNA damage-inducible protein 45A, Proliferating cell nuclear antigen, Selenomethionine",
author = "Jung, {Hwa Jin} and Kim, {Hye Lim} and Kim, {Yeo Jin} and Weon, {Jong Il} and Seo, {Young Rok}",
year = "2013",
month = "10",
doi = "10.3892/or.2013.2613",
language = "English (US)",
volume = "30",
pages = "1581--1586",
journal = "Oncology Reports",
issn = "1021-335X",
publisher = "Spandidos Publications",
number = "4",

}

TY - JOUR

T1 - A novel chemopreventive mechanism of selenomethionine

T2 - Enhancement of APE1 enzyme activity via a Gadd45a, PCNA and APE1 protein complex that regulates p53-mediated base excision repair

AU - Jung, Hwa Jin

AU - Kim, Hye Lim

AU - Kim, Yeo Jin

AU - Weon, Jong Il

AU - Seo, Young Rok

PY - 2013/10

Y1 - 2013/10

N2 - Organic selenium compounds have been documented to play a role in cancer prevention. Our previous study showed that selenomethionine (SeMet) induces p53 activation without genotoxic effects including apoptosis and cell cycle arrest. In this study, we investigated the mechanism by which organic selenium compounds promote p53-mediated base excision repair (BER) activity. Our data demonstrated for the first time that the interaction between growth arrest and DNA damage-inducible protein 45A (Gadd45a), which is a p53-activated downstream gene, and two BER-mediated repair proteins, proliferating cell nuclear antigen (PCNA) and apurinic/apyrimidinic endonuclease (APE1/Ref-1), was significantly increased in a p53-dependent manner following treatment with organic selenium compounds. Furthermore, we observed that the activity of APE1 was significantly increased in a p53-dependent manner in response to the organic selenium compounds. These results suggest that BER activity is dependent on wild-type p53 activity and is mediated by the modulation of protein interactions between Gadd45a and repair proteins in response to organic selenium compounds. We propose that p53-dependent BER activity is a distinct chemopreventive mechanism mediated by organic selenium compounds, and that this may provide insight into the development of effective chemopreventive strategies against various oxidative stresses that contribute to a variety of human diseases, particularly cancer.

AB - Organic selenium compounds have been documented to play a role in cancer prevention. Our previous study showed that selenomethionine (SeMet) induces p53 activation without genotoxic effects including apoptosis and cell cycle arrest. In this study, we investigated the mechanism by which organic selenium compounds promote p53-mediated base excision repair (BER) activity. Our data demonstrated for the first time that the interaction between growth arrest and DNA damage-inducible protein 45A (Gadd45a), which is a p53-activated downstream gene, and two BER-mediated repair proteins, proliferating cell nuclear antigen (PCNA) and apurinic/apyrimidinic endonuclease (APE1/Ref-1), was significantly increased in a p53-dependent manner following treatment with organic selenium compounds. Furthermore, we observed that the activity of APE1 was significantly increased in a p53-dependent manner in response to the organic selenium compounds. These results suggest that BER activity is dependent on wild-type p53 activity and is mediated by the modulation of protein interactions between Gadd45a and repair proteins in response to organic selenium compounds. We propose that p53-dependent BER activity is a distinct chemopreventive mechanism mediated by organic selenium compounds, and that this may provide insight into the development of effective chemopreventive strategies against various oxidative stresses that contribute to a variety of human diseases, particularly cancer.

KW - APE1/Ref-1

KW - Base excision repair

KW - Growth arrest and DNA damage-inducible protein 45A

KW - Proliferating cell nuclear antigen

KW - Selenomethionine

UR - http://www.scopus.com/inward/record.url?scp=84882583476&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882583476&partnerID=8YFLogxK

U2 - 10.3892/or.2013.2613

DO - 10.3892/or.2013.2613

M3 - Article

VL - 30

SP - 1581

EP - 1586

JO - Oncology Reports

JF - Oncology Reports

SN - 1021-335X

IS - 4

ER -