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Radiation hormesis ; Induction of endogenous thiol containg autioxidants by low-dose radiation

Research Project

Project/Area Number 11680556
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 環境影響評価(含放射線生物学)
Research InstitutionScience University of Tokyo

Principal Investigator

KOJIMA Shiji  Science Univ.of Tokyo, Pharmacentical Sciences, Associate Prof., 薬学部, 助教授 (90119579)

Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1999: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsRadiation hormesis / Glutathione / Sigualling / Colcium Ion / 生体体内抗酸化系 / 放射線抵抗性誘導 / マクロファージ様細胞 / mRNA / 放射線抵抗性 / 生体内坑酸化系
Research Abstract

First, the mechanisms of the elevation of glutathione level induced in macrophage-like RAW 264.7 cells by low doses of γ-rays was examined. Doses between 25 and 100 cGy significantly increased the glutathione level at 4 hr post-irradiation. It was also shown that the elevation of glutathione level in cells irradiated with low doses of γ-rays followed the induction of mRNA coding for γ-GCS, a rate-limiting enzyme of the de novo glutathione synthesis pathway. Based on the inhibitory effects of various inhibitors of protein kinases on the induction of γ-GCS mRNA by low-dose γ-ray, it has been suggested that the tyrosine kinase, calcium channel, and protein kinase C activities play an essential role in the low-dose-radiation-induced elevation of cellular glutathione.
Then, involvement of glutathione in the appearance of radioresistance and the enhancement of immune function induced by low-dose radiation was examined. As a result, it has been found that the induction of endogenous glutathione in living cells soon afer low-dose γ-ray irradiation is at least partially responsible for the appearance of radioresistance to a subsequent lethal dose of radiation and of the enhancement of immune function.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] S.Kojima: "Effect of pre-imadiation with low-dose r-rays on chemically induced hepatotoxicity and gluts thionic depletion."Auticancer Res.,. 20. 1583-1588 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Mechanisms involved in the elevation of glutothion in RAW 264,7 cells asposed to low doses for r-rays."Anticancer Res.,. 20. 1589-1594 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Shimura: "Usofulness of aqm7C-d, l-HMPD for estimotion of glutothione cotent in tumor tissues."Nucl.Med.Biol.,. 27. 577-580 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Teshima: "Involvement of calciumion in elevation of mRNA for r-GCS induced by low-dose r-rays"Int.J.Rad.Biol.,. 76. 1631-1639 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Possible role of elevation of glutothione in the aquisition of enhanced proliferation of mouse solenocytes exposed to small-dose r-rays"Int.J.Rad.Biol.,. 76. 1641-1647 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Takahashi: "Prevention of type I diabetes by low-dose gamma inadiation in NOD mice."Rad.Res.,. 154. 680-685 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Biological Effects of Low Dose Radiation"T.Yamada, C.Mothersill, B.D.Michael and C.S.Potter (Elsevier Science). 11 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Nomura: "Biological Effects of Low Dose Radiation"T.Yamada,C.Mothersill,B.D.Michael and C.S.Potter (Elsavier Science). 6 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Effect of pre-irradiation with low-dose γ-rays on chemically induced hepatotoxicity and glutathione depletion"Anticancer Res. 20. 1583-1588 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Mechanisms involved in the elevation of glutathione in RAW 264.7 cells exposed to low doses of γ-rays."Anticancer Res. 20. 1589-1594 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Shimura: "Kubodera and T.Sasaki. Usefulness of ^<99m>Tc-d, l-HMPO for estimation of glutathione content in tumor tissues"Nucl.Med.Biol. 27. 577-580 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] K.Teshima: "Involvement of calcium ion in elevation of mRNA for γ-glutamyl-cysteine synthetase (γ-GCS) induced by low-dose γ-rays"Int.J.Rad.Biol. 76. 1631-1639 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Possible role of elevation of glutathione in the acquisition of enhanced proliferation of mouse splenocytes exposed to small- dose γ-rays"Int.J.Rad.Biol. 76. 1641-1647 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Takahashi: "Prevention of type I diabetes by low-dose gama irradiation in NOD mice."Rad.Res.. 154. 680-685 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Amsterdam, Elsevier Science"Induction of glutathione in mouse brain by low dose of γ-rays. In Biological Effects of Low Dose Radiation, T.Yamada, C.Mothersill, B.D.Michael and C.S.Potten (eds).. 117-127 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Nomura: "Amsterdam, Elsevier Science"Suppression of ROS-related disease in mouse models by low-dose γ-ray irradiation. In Biological Effects of Low Dose Radiation, T.Yamada, C.Mothersill, B.D.Michael and C.S.Potten (eds).. 101-106 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] S.Kojima: "Effect of pre-irradiation with low-dose γ-rays on chemically induced hepatotoxicity and glutathione depletion."Anticancer Res.. 20. 1583-1588 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kojima: "Mechanisms involved in the elevation of glutathione in RAW 264.7 cells exposed to low doses of γ-rays."Anticancer Res.,. 20. 1589-1594 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Shimura: "Usefulness of 99mTc-d, l-HMPO for estimation of glutathione content in tumor tissues."Nucl.Med.Biol.,. 27. 577-580 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Teshima: "Involvement of calcium ion in elevation of mRNA for γ-GCS induced by low-dose γ-rays."Int.J.Rad.Biol.,. 76. 1631-1639 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kojima: "Possible role of elevation of glutathione in the aquisition of enhanced proliferation of mouse splenocytes exposed to small-dose γ-rays."Int.J.Rad.Biol.,. 76. 1641-1647 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Takahashi: "Prevention of type I diabetes by low-dose gamma irradiation in NOD mice."Rad.Res.,. 154. 680-685 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kojima: "Biological Effects of Low Dose Radiation"T.Yamada,C.Mothersill,B.D.Michael and C.S.Potter (Elsevier Science). 117-127 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Nomura: "Biological Effects of Low Dose Radiation"T.Yamada,C.Mothersill,B.D.Michael and C.S.Potter (Elsevier Science). 101〜106 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kojima: "Elevation of antioxidant potency in the brain of mice by low-dose γ-ray irradiation and its effect on 1-methyl-4-phenyl-1,2,3,6-tetrahyropyridine(MPTP)-induced brain damage"Free Radic.Biol.Med.. 26. 388-395 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Yamaoka: "Changes of SOD-like substances in mouse organs after low-dose X-ray irradiation"Physiol.Chem.Phys.Med.NMR.. 31. 23-28 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Yamaoka: "Inhibitory effect of post low dose γ-ray irradiation on ferric-nitrilotriacetate-induced mice liver damage"Free Rad.Res.. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Kojima: "Elevantion of glutathione in RAW246.7 cells by low-dose γ-ray irradiation and its respossible for the appearance of radioresistance"Anticancer Res.. 20(in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 小島周二: "低線量放射線に対する生体の応答反応-坑酸化系の誘導とその疾患への応用の可能性-"衛生化学. 45. 133-143 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 山岡聖典: "低線量放射線の不思議な生体作用-ラドン温泉が効くわけを探る-"現代化学. 346. 24-30 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Kojima: "Induction of glutathione in mouse brain by low dose of γ-rays"Elsevier Science(in press). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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