• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Quantification of combined effects of radiation under continuous gamma-ray irradiation using medaka thymus.

Research Project

Project/Area Number 21K12251
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 63020:Radiation influence-related
Research InstitutionNational Institutes for Quantum Science and Technology

Principal Investigator

Maruyama Kouichi  国立研究開発法人量子科学技術研究開発機構, 放射線医学研究所 計測・線量評価部, 主幹研究員 (70349033)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsメダカ / 胸腺 / 放射線 / 複合影響 / 胸腺萎縮 / 放射線障害 / 概日リズム障害
Outline of Research at the Start

環境評価生物であるメダカの胸腺をターゲットにして、放射線+αの異なる複数のストレスをメダカに与え、胸腺の萎縮の程度から、ストレス影響が現れるしきい値を検証する。具体的にαは、A)概日リズム障害、B)化学物質、C)心因的要因を想定している。 申請者はこれまでに、胸腺が生きたまま可視化出来る遺伝子改変メダカを用いて、放射線影響を定量化出来るシステムを構築している。この系は生体そのものが受けているストレスを直接生きたまま観察、定量可能な系であることから、簡便に放射線+αのストレスへの効果を定量化出来るものであり、様々な複合影響や未知なるストレス因子などへの応用が可能である。

Outline of Final Research Achievements

We have established a novel biosystem for quantifying radiation effects in real-time using thymus-visualizing living medaka. By observing the thymus after a single X-ray exposure, we can observe and analyze the radiation effects and recovery in a dose-dependent manner (Maruyama et al.,IJRB 2019).
Using this system, three different types of stress were confirmed to cause thymic atrophy in medaka. The thymic atrophy in medaka was significantly observed under circadian rhythm disorder and psychological stress. The chemical (NaAsO2) did not atrophy the thymus compared with the other stresses. The threshold of the thymic atrophy was revealed at lower doses under the stress of the circadian rhythm disorders and psychogenic stress.

Academic Significance and Societal Importance of the Research Achievements

これまでにマウスの拘束モデル下での放射線影響との複合影響の仕事はあり、より低い線量で放射線影響が出ることが示されている。しかしながら魚類においては同様の研究は行われていない。今回、申請者が構築している胸腺可視化モデルを使い、放射線以外のストレスでもストレスを定量することが示され、また、ストレス下での放射線の影響を調べ、日照リズム障害下や心因的ストレス下では、より低い線量で放射線影響を与えることが示された。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (4 results)

  • [Journal Article] Dose estimation to wild medaka around Fukushima Dai-ichi nuclear power plant.2023

    • Author(s)
      Maruyama Kouichi, Wang Bing,Watanabe Yoshito
    • Journal Title

      Radiation Protection Dosimetry

      Volume: 199(10) Issue: 10 Pages: 1110-1119

    • DOI

      10.1093/rpd/ncad140

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Enhanced effects of chronic restraint-induced psychological stress on total body Fe-irradiation-induced hematopoietic toxicity in Trp53-heterozygous mice.2022

    • Author(s)
      Wang Bing, Katsube Takanori, Tanaka Kaoru, Ninomiya Yasuharu, Hirakawa Hirokazu, Cuihua Liu, Maruyama Kouichi, Guillaume Vares, Kito Seiji, Nakajima Tetsuo, Fujimori Akira, Nenoi Mitsuru
    • Journal Title

      Life

      Volume: 12(4) Issue: 4 Pages: 565-565

    • DOI

      10.3390/life12040565

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Induction of adaptive response in utero by ionizing radiation: A radiation quality dependent phenomenon.2022

    • Author(s)
      Wang Bing, Tanaka Kaoru, Maruyama Kouichi, Ninomiya Yasuharu, Katsube Takanori, Nenoi Mitsuru
    • Journal Title

      BIOCELL

      Volume: 46(10) Issue: 10 Pages: 2315-2325

    • DOI

      10.32604/biocell.2022.021161

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] More efficient induction of genotoxicity by high-LET Fe-particle radiation than low-LET X-ray radiation at low doses.2022

    • Author(s)
      Wang Bing, Katsube Takanori, Tanaka Kaoru, Ninomiya Yasuharu, Hirakawa Hirokazu, Cuihua Liu, Maruyama Kouichi, Murakami Masahiro, Nakajima Tetsuo, Fujimori Akira, Nenoi Mitsuru
    • Journal Title

      Radiation Medicine and Protection

      Volume: - Issue: 1 Pages: 11-18

    • DOI

      10.1016/j.radmp.2022.12.001

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Synergistic effects of chronic restraint-induced stress and low-dose 56Fe-particle irradiation on induction of chromosomal aberrations in Trp53-heterozygous mice.2021

    • Author(s)
      Takanori Katsube , Bing Wang , Kaoru Tanaka , Yasuharu Ninomiya , Hirokazu Hirakawa , Cuihua Liu , Kouichi Maruyama , Guillaume Vares , Qiang Liu , Seiji Kito , Tetsuo Nakajima , Akira Fujimori , Mitsuru Nenoi
    • Journal Title

      Radiation Research

      Volume: 196(1) Issue: 1 Pages: 100-112

    • DOI

      10.1667/rade-20-00218.1

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Appearance of radiation-induced thymic atrophy at lower doses under the stress of changes in the circadian rhythm.2023

    • Author(s)
      Maruyama Kouichi
    • Organizer
      日本放射線影響学会第66回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Establishment of a biosystem for quantification of the radiation effects and its combined effects of radiation with other factors.2023

    • Author(s)
      Maruyama Kouichi
    • Organizer
      The 29th Japanese Medaka and Zebrafish Meeting
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of a biosystem for detecting the combined effects of radiation and other stress factors using medaka thymus.2022

    • Author(s)
      丸山耕一
    • Organizer
      日本放射線影響学会第65回大会
    • Related Report
      2022 Research-status Report
  • [Presentation] メダカ胸腺を用いた放射線との複合影響定量システムの開発2021

    • Author(s)
      丸山耕一
    • Organizer
      日本放射線影響学会第64回大会
    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi