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1989 Fiscal Year Final Research Report Summary

Effect of Multiple-Dose Irradiation on Cultured Mammalian Cells

Research Project

Project/Area Number 63570494
Research Category

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

Allocation TypeSingle-year Grants
Research Field Radiation science
Research InstitutionYokohama City University

Principal Investigator

MATSUI Kengo  Yokohama City University, School of Medicine, Professor, 医学部, 教授 (60117760)

Co-Investigator(Kenkyū-buntansha) KUBOTA Nobuo  Yokohama City University, School of Medicine, Assistant, 医学部, 助手 (20046139)
Project Period (FY) 1988 – 1989
KeywordsMultiple-Dose Irradiation / Sublethal Damage / Potentially Lethal Damage / Repair / C3H 10T1 / Cells
Research Abstract

Using plateau phase C3H 10T1/ cells, we studied the effect of multiple-dose irradiation on the repair capacity of cells after further irradiation. Cells were irradiated with repeated doses of 2.5 Gy delivered two fractions per day 6 to 7 hours interval. The cell survival after exposure to 1 to 9fractions was lower above 5 fractions as compared to that predicted by calculating from single dose survival curve. Repair kinetics experiments showed that cells were less able to repair potentially lethal damage after test dose following multiple dose irradiations. There was, however, no difference in the ability to repair sublethal damage and potentially lethal damage sensitive to anisotonic treatment in preirradiated and untreated cells. Thus, it would appear that an enhancement of the lethal expression of potentially lethal damage only of three types of damage may, at least in part, contribute to the difference between the cell survival curve after multiple fractions and that predicted by calculation.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 窪田宜夫: "プラト-期10T1/2細胞における放射線の多分割照射の影響" 日本医学放射線学会生物部会誌. 2. 45-47 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nobuo Kubota: "Effect of multiple-dose irradiation on repair capacity in plateau phase C3H10T1/2 cells" Journal of Radiation Research.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] NOBUO KUBOTA: "Effect of multiple-dose irradiation on plateau phase 10T1/ cells" Nihon Igaku Houshasen Gakkai Seibutsubukaishi 2, 45-47, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] NOBUO KUBOTA: "Effect of multiple-dose irradiation on repair capacity in plateau phase C3H 10T1/ cells." Submitted to J. Radiat. Res.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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