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Effect of peroxide radicals on UVB-induced DNA damage

Research Project

Project/Area Number 06454601
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Biological pharmacy
Research InstitutionUNIVERSITY OF SHIZUOKA

Principal Investigator

OKADA Shoji  University of Shizuoka, School of Pharmaceutical Sciences, Professor, 薬学部, 教授 (40046256)

Co-Investigator(Kenkyū-buntansha) OKU Naoto  University of Shizuoka, School of Pharmaceutical Sciences, Associate Professor, 薬学部, 助教授 (10167322)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1995: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1994: ¥4,500,000 (Direct Cost: ¥4,500,000)
KeywordsUVB / UVC / DNA damage / DNA strand breaks / pyrimidine dimer / active oxygen / dimethyl arsine / DNA repair / UVC / ジメチル砒素 / DNA一重鎖切断 / ピリミジンニ量体 / 活性酵素 / 過酸化ラジカル
Research Abstract

The induction of DNA damage caused by UV-B and UV-C was investigated by use of cultured L-132 cells. DNA strand breaks occurred dose-dependently, the extent of strand breaks inversely correlated well with the number of viable L-132 cells after 24 h incubation. About 10-fold dose of UV-B irradiation was required to induce the similar extent of strand breaks to those induced by UV-C.Similarly about 10-fold dose of UV-B was required to produce the similar amount of pyrimidine dimers determined by ELISA.Strand breaks induced by UV-B,however, were not fully repaired in viable cells remained after incubation of cells for longer period of time, although UV-C-induced strand breaks were repaired time-dependently. Furthermore, an experiment with a cell-free system, where the induction of strand breaks by repair enzymes was not taken place, indicated that UV-B caused direct DNA strand breaks significantly more than those caused by one-tenth dose of UV-C.The data shown here suggest that UV-B-induced DNA damage was mediated, at least in part, via a diffrent mechanism from UV-C induce one. We also investigated the effect of peroxide radicals on UV-induced DNA damage, by use of inhibitors for superoxide dismutase and catalase and of a radical scavenger. UV-C-induced DNA damage was affected by them, althougt no obvious difference was observed on UV-B-induced one, suggesting again that the damage caused by UV-B is differ from that caused by UV-C.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Ken Rin,et al.: "DNA-strand Breaks Induced by Dimethylarsinic Acid,a Metabolite of Inorganic Arsenics,Are Strongly Enhanced by Superoxide Anion Radicalls." Biol. Pharm. Bull.,. 18. 45-48 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takayuki Sato,et al.: "Differential Effects of UV-B and UV-C on DNA Damage in L-132 Cells." Biol. Pharm. Bull.,. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kenji Kawaguchi,et al.: "Dimethylarsenics Reveal DNA Damage Induced by Superoxide Anion Radicals." Biol. Pharm. Bull.,. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ken Rin, Kenji Kawaguchi, Kenzo Yamanaka, Masakatsu Tezuka, Naoto Oku and Shoji Okada: "DNA-strand Breaks Induced by Dimethylarsinic Acid, a Metabolite of Inorganic Arsenics, Are Strongly Enhanced by Superoxide Anion Radicals." Biol.Pharm.Bull.18. 45-48 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takayuki Sato, Naoto Oku, Eri Iida, Kenji Kawaguchi, Kenzo Yamanaka, Toshio Mori and Shoji Okada: "Differential Effect of UV-B and UV-C on DNA Damage in L-132 Cells." Biol.Pharm.Bull.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kenji Kawaguchi, Naoto Oku, Ken Rin, Kenzo Yamanaka and Shoji Okada: "Dimethylarsenics Reveal DNA Damage Induced by Superoxide Anion Radicals" Biol.Pharm.Bull.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ken Rin,et al.: "DNA-strand Breaks lnduced by Dimethylarsinic Acid,a Metabolite of lnorganic Arsenics,Are Strongly Enhanced by Superoxide Anion Radicals." Biol.Pharm.Bull.,. 18. 45-48 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Takayuki Sato,et al.: "Differential Effect of UV-B and UV-C on DNA Damagein L-132 Cells." Biol.Pharm.Bull.,. (in press).

    • Related Report
      1995 Annual Research Report
  • [Publications] Kenji Kawaguchi,et al.: "Dimethylarsenics Reveal DNA Damage Induced by Superoxide Anion Radicals." Biol.Pharm.Bull.,. (in press).

    • Related Report
      1995 Annual Research Report
  • [Publications] Kenzo Yamanaka: "Induction of Lung-Specific DNA Damage by Metabolically Methylated Arsenics via the Production of Free Radicals" Environ.Health Persp.102(Suppl,3). 37-40 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Koichi Kato: "DNA Damage Induced in Cultured Human Alveolar (L-132) Cells by Exposure to Dimethylarsinic Acid" Environ.Health Persp.102(Suppl,3). 285-288 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kenji Kawaguchi: "Interaction between Dimethylarsenics and Active Oxygen Species in the Induction of Gene Damage" 衛生化学. 40. P・24- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kenzo Yamanaka: "Gene Damage in Human Pulmonary Cultured Cells Induced by Dimethylarsenics" 衛生化学. 40. P・37 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ken Rin: "DNA-Strand Breaks Induced by Dimethylarsinic Acid,a Metabolite of Inorganic Arsenics,Are Strongly Enhanced by Superoxide Anion Radicals" Biol.Pharm.Bull.18. 45-48 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takayuki Sato: "Mode of Gene Damage Induce by the Exposure to UVB and Some Radical species" 衛生化学. 41. P.17- (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shoji Okada: "Arsenic in the Environment,PartII(J.O.Nriagu ed.)" John Wiley of Sons,New York,Advances in Environ,Sci,of Technol., 293 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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