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Sensitive evaluation method for neurotoxicity using a novel marker

Research Project

Project/Area Number 20H04342
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63030:Chemical substance influence on environment-related
Research InstitutionHiroshima University

Principal Investigator

Kotake Yaichiro  広島大学, 医系科学研究科(薬), 教授 (20335649)

Co-Investigator(Kenkyū-buntansha) 佐能 正剛  和歌山県立医科大学, 薬学部, 准教授 (00552267)
宮良 政嗣  広島大学, 医系科学研究科(薬), 助教 (60816346)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywords毒性評価指標 / 神経毒性 / 神経毒性評価 / 核呼吸因子-1 / 毒性評価系
Outline of Research at the Start

神経毒性が疑われる物質の絞りこみには優れた神経毒性マーカーが必要であり、早期に変動する高感度神経毒性指標の発見が望まれている。われわれは、複数の化学物質が神経細胞死を惹起するより前に核呼吸因子-1 (NRF-1) を低下させることを明らかにした。このことから、NRF-1低下は神経細胞死が惹起される前段階に特有の「弱った状態」を示す優れた指標になることが期待される。そこで本研究では、化学物質の神経毒性評価指標としてNRF-1低下を利用することの有用性を検証し、NRF-1活性評価細胞など高感度神経毒性評価系の構築を行う。

Outline of Final Research Achievements

In this study, we explored the possibility of using nuclear respiratory factor-1 (NRF-1), which we found to be decreased in the prophase of organotin-induced neuronal cell death, as a highly sensitive marker of neurotoxicity. First, we generated reporter cells (N-Rep cells) that can easily evaluate NRF-1 activity. Next, we used N-Rep cells to examine the time relationship between the decrease in NRF-1 activity and cell death for various chemicals. We found that NRF-1 decreased from concentrations at which cell death did not occur when exposed to methoxychlor, PCP, and famoxadone. Thus, NRF-1 decrease was observed for some substances even before the onset of toxicity, suggesting that NRF-1 is useful as a highly sensitive marker of neurotoxicity.

Academic Significance and Societal Importance of the Research Achievements

化学物質の神経毒性試験は、OECDなどのガイドラインに準拠した試験法により行われるが、大量の実験動物と莫大な費用、時間、労力が必要であり、有害性が疑われるごく一部の化学物質しか行うことができない。そのため、動物実験を行う前に神経毒性が疑われる物質を絞りこむための神経毒性指標が必要となる。ところが、既存の評価指標については神経毒性が発現してはじめて変化するものがほとんどであるため、早期に変動する高感度神経毒性指標の発見が望まれている。本研究で有用であることを見出したNRF-1のような高感度神経毒性マーカーは,未知化学物質の有害性早期発見に大いに役立つことが期待される.

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (12 results)

All 2023 2022 2020

All Journal Article (10 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 10 results,  Open Access: 4 results) Presentation (2 results) (of which Invited: 1 results)

  • [Journal Article] Methylmercury Decreases AMPA Receptor Subunit GluA2 Levels in Cultured Rat Cortical Neurons2023

    • Author(s)
      Ishida K, Takeda K, Takehara Y, Takabayashi T, Miyara M, Sanoh S, Kawai H, Ohta S, Kotake Y
    • Journal Title

      Biological and Pharmaceutical Bulletin

      Volume: 46 Issue: 2 Pages: 292-300

    • DOI

      10.1248/bpb.b22-00744

    • ISSN
      0918-6158, 1347-5215
    • Year and Date
      2023-02-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Establishment of hyperoxic cell culture system for predicting drug-induced liver injury: reducing accumulated lipids in hepatocytes derived from chimeric mice with humanized liver2023

    • Author(s)
      Ohtsuki Yuya,Sanoh Seigo,Yamao Mikaru,Kojima Yuha,Kotake Yaichiro,Tateno Chise
    • Journal Title

      The Journal of Toxicological Sciences

      Volume: 48 Issue: 2 Pages: 99-108

    • DOI

      10.2131/jts.48.99

    • ISSN
      0388-1350, 1880-3989
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tributyltin activates the Keap1–Nrf2 pathway via a macroautophagy-independent reduction in Keap12023

    • Author(s)
      Hatano Misaki、Hatamiya Shunichi、Miyara Masatsugu、Kotake Yaichiro
    • Journal Title

      The Journal of Toxicological Sciences

      Volume: 48 Issue: 3 Pages: 161-168

    • DOI

      10.2131/jts.48.161

    • ISSN
      0388-1350, 1880-3989
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Assessment of metabolic activation of felbamate in chimeric mice with humanized liver in combination with <i>in vitro</i> metabolic assays2022

    • Author(s)
      Sato Koya、Sanoh Seigo、Ishida Yuji、Tateno Chise、Ohta Shigeru、Kotake Yaichiro
    • Journal Title

      The Journal of Toxicological Sciences

      Volume: 47 Issue: 7 Pages: 277-288

    • DOI

      10.2131/jts.47.277

    • ISSN
      0388-1350, 1880-3989
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Trehalose decreases mRNA and protein expressions of c-Jun and JunB in human cervical cancer HeLa cells2022

    • Author(s)
      Umeda-Miyara Kanae、Miyara Masatsugu、Sanoh Seigo、Kotake Yaichiro
    • Journal Title

      The Journal of Biochemistry

      Volume: 172 Issue: 3 Pages: 177-187

    • DOI

      10.1093/jb/mvac051

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improved Predictability of Hepatic Clearance with Optimal pH for Acyl-Glucuronidation in Liver Microsomes2022

    • Author(s)
      Mizutare Tohru、Sanoh Seigo、Kanazu Takushi、Ohta Shigeru、Kotake Yaichiro
    • Journal Title

      Journal of Pharmaceutical Sciences

      Volume: 111 Issue: 11 Pages: 3165-3173

    • DOI

      10.1016/j.xphs.2022.08.015

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Prenatal exposure to valproic acid causes allodynia associated with spinal microglial activation2022

    • Author(s)
      Imado E, Sun S, Abawa AR, Tahara T, Kochi T, Huynh TNB, Asano S, Hasebe S, Nakamura Y, Hisaoka-Nakashima K, Kotake Y, Irifune M, Tsuga K, Takuma K, Morioka N, Kiguchi N, Ago Y.
    • Journal Title

      Neurochemistry International

      Volume: 160 Pages: 105415-105415

    • DOI

      10.1016/j.neuint.2022.105415

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tributyltin inhibits autophagy by decreasing lysosomal acidity in SH-SY5Y cells2022

    • Author(s)
      Hatamiya Shunichi、Miyara Masatsugu、Kotake Yaichiro
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 592 Pages: 31-37

    • DOI

      10.1016/j.bbrc.2021.12.118

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Triphenyltin inhibits GA-binding protein α nuclear translocation2020

    • Author(s)
      Kidoguchi Naohiro、Ishida Keishi、Sanoh Seigo、Miyara Masatsugu、Kotake Yaichiro
    • Journal Title

      Fundamental Toxicological Sciences

      Volume: 7 Issue: 1 Pages: 33-40

    • DOI

      10.2131/fts.7.33

    • NAID

      130007789673

    • ISSN
      2189-115X
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Amiodarone bioconcentration and suppression of metamorphosis in Xenopus2020

    • Author(s)
      Sanoh Seigo、Hanada Hideki、Kashiwagi Keiko、Mori Tsukasa、Goto-Inoue Naoko、Suzuki Ken-ichi T.、Mori Junpei、Nakamura Naoki、Yamamoto Takashi、Kitamura Shigeyuki、Kotake Yaichiro、Sugihara Kazumi、Ohta Shigeru、Kashiwagi Akihiko
    • Journal Title

      Aquatic Toxicology

      Volume: 228 Pages: 105623-105623

    • DOI

      10.1016/j.aquatox.2020.105623

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 発達神経毒性物質に共通する発現変動遺伝子の探索2023

    • Author(s)
      藤原 涼雅、宮良 政嗣、竹原 有希、高林 智樹、山本 佑樹、田原 栄俊、古武 弥一郎
    • Organizer
      日本薬学会第143年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 有機スズの転写因子活性低下を介したシグナルトキシコロジー2020

    • Author(s)
      古武弥一郎
    • Organizer
      第47回日本毒性学会学術年会
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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