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Biological effect of extreamely low frequency magnetic fields on microorganisms

Research Project

Project/Area Number 08680574
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 InstitutionOsaka University

Principal Investigator

SHIMIZU Kikuo  Radioisotope Research Center, Osaka University, Research Asst., ラジオアイソトープ総合センター, 助手 (20162696)

Co-Investigator(Kenkyū-buntansha) YAMAMOTO Takayoshi  Radioisotope Research Center, Osaka University, Prof., ラジオアイソトープ総合センター, 教授 (30029243)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywordsmagnetic field / mutation / yeast / DNA repair / 非電離放射線 / 電磁波 / 電場
Research Abstract

The biological effects of extremely low frequency magnetic fields (ELF) are not clear. Epidemiological studies have shown weak correlations between exposure to ELF and the incidence of several cancers, but negative studies have also reported. Recent study showed human melanoma cells were induced mutations by ELF.
In this work, We studied the effect of ELF of 60-Hz and 500 mT on the growth and the mutation frequency of the budding yeast S.cerevisiae and the ciliate Paramecium multimicronuncleatum. The growth rate of several strains of S.cerevisiae (wild type and radiation sensitive mutants, rad) and P.multimicronucleatum were examined but no significant differnce on growth were observed. We have also tried to isolate the ELF sensitive mutants of S.cerevisiae. Two ELF-sensitive candidates were obtained after screening ten thousand mutated yeast cells and now we have been examining them.
Moreover, the behavior of P.multimicronuncleatum under the ELF or static magnetic fields were examined.
When P.multimicronucleatum was exposed with ELF magnetic field, P.multimicronucleatum went up to cuvette, and remained there, and when exposure was stopped the cells swam randamly again. Now we are going to analyze the detail mechanism.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] S.Okano: "Cloning of a novel ubiquitin-conjugating enzymes(E2)gene frm the ciliate Paramecium tetraurelia." FEBS Letters. 391. 1-4 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Shimizu: "Effect of extremely low frequency magnetic fields on the yeast S.cerevisiae cells." Proceedings of 2nd International conference on radiation dosimetry and safety,Taipei,Taiwan ROC.75-78 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] K.Shimizu: "Biological effect of extreamely low frequency magnetic fields on microorganisms." Proceedings of IRPA regional symposium,Plague,Czech Republic. 642-643 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Okano, S., Tokushima, H., Nakaoka, Y., & Shimizu, K.: "Cloning of a novel ubiquitin-conjugating enzymes (E2) gene frm the ciliate Paramecium tetraurelia" FEBS Letters. 391. 1-4 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shimizu, K., Tottori, T., Kyoh, B,& Yamamoto, T.: "Effect of extremely low frequency magnetic fields on the yeast S.cerevisiae cells." Proceedings of 2nd International conference on radiation dosimetry and safety, Taipei, Taiwan ROC. 75-78 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shimizu, K., Tottori, T., Kyoh, B., nakaoka, Y.& Yamamoto, T.: "Biological effect of extreamely low frequency magnetic fields on microorganisms." Proceedings of IRPA regional symposium, Plague, Czech Republic. 642-643 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Okano: "Clining of a novel ubiquitin-conjugating enzymes(E2)gene frm the ciliate paramecium tetraurelia." FEBS Letters. 391. 1-4 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Shimizu: "Effect of extremely low frequency magnetic fields on the yeast S.cerevisiae cells." Proceedings of 2nd International conference on radiation dosimetry and safety,Taipei,Taiwan ROC. 75-78 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Simizu: "Biological effect of extreamely low frequency magnetic fields on microorganisms" Proceedings of IRPA regional symposium,Plague,Czech Republic. 642-643 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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