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Effects of prenatal exposure to nanoparticles on gene expression patterns in the brain of the second generation offspring via male germ cells

Research Project

Project/Area Number 17K15854
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Hygiene and public health
Research InstitutionNational Institute of Health Sciences (2018)
Ohu University (2017)

Principal Investigator

Yokota Satoshi  国立医薬品食品衛生研究所, 毒性部, 主任研究官 (70706605)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsナノマテリアル / DOHaD / 多世代・継世代影響 / 妊娠期曝露 / 精子形成 / エピゲノム / マイクロRNA / 海馬 / 行動 / 神経伝達物質 / マウス / transgenerational effect / reproductive toxicology / male germ cell / nanoparticles / brain / epigenetics / behavior / mouse / 衛生学 / 経世代影響 / 超微小粒子 / 胎仔期曝露
Outline of Final Research Achievements

The F2 offspring born to F1 sires which gestationally exposed to silver nanoparticles showed subtle changes in gene expressions related to behavior and acetylcholine signals compared to controls. To explore the mechanism of how the effects of F1 male pups were transmitted to F2 generation, we investigated changes in the expressions of one of the small non-coding RNA, microRNA, in the testes of F1 mice using microarray.
We observed significantly reduction of exposed F1 sperm motility and sperm number. We also identified some microRNA expression changes of exposed mice in a dose-dependent manner. These microRNA expressions were likely to be related to genes which were differentially expressed between exposed mice and controls in the F2 hippocampus. These data enable us to further investigate microRNA expression changes involved in the transgenerational effects of paternally acquired epigenetic effects.

Academic Significance and Societal Importance of the Research Achievements

ナノ粒子の妊娠期曝露により生じる多世代影響に関する報告は数少なく、そのメカニズムに関する報告は皆無である。このような状況下、私たちはマウス胎仔期曝露の実験により、F1 世代の脳神経および雄性生殖器に粒子が蓄積し健康影響が生じることを解明してきた。本研究は、妊娠期曝露の多世代影響に関する実験検証を行う良いモデルを構築することに成功し、曝露を直接受けていない F2 の脳神経系への影響を解明、ならびに、そのメカニズムとしてのF1 生殖系列のエピジェネティックな変化を捉えることができた。本研究の遂行による世代影響のバイオマーカー同定に向けた基礎的知見を付与した点に学術的・社会的意義があると考えている。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (15 results)

All 2019 2018 2017 Other

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Long-term dietary intake of excessive vitamin A impairs spermatogenesis in mice2019

    • Author(s)
      Yokota S、Shirahata T、Yusa J、Sakurai Y、Ito H、Oshio S
    • Journal Title

      The Journal of Toxicological Sciences

      Volume: 44 Issue: 4 Pages: 257-271

    • DOI

      10.2131/jts.44.257

    • NAID

      130007623319

    • ISSN
      0388-1350, 1880-3989
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evaluation of critical flicker-fusion frequency measurement methods using a touchscreen-based visual temporal discrimination task in the behaving mouse2018

    • Author(s)
      Nomura, Y., Ikuta, S., Yokota, S., Mita, J., Oikawa, M., Matsushima, H., Amano, A., Shimonomura, K., Seya, Y., & Koike, C.
    • Journal Title

      Neuroscience Research

      Volume: - Pages: 1-6

    • DOI

      10.1016/j.neures.2018.12.001

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A simple and robust quantitative analysis of retinol and retinyl palmitate using a liquid chromatographic isocratic method.2018

    • Author(s)
      Yokota S, Oshio S
    • Journal Title

      Journal of Food and Drug Analysis

      Volume: 26(2) Issue: 2 Pages: 504-11

    • DOI

      10.1016/j.jfda.2017.07.002

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 妊娠期の免疫活性化により生じる神経発達障害のメカニズムに迫る2018

    • Author(s)
      横田理
    • Journal Title

      ファルマシア (トピックス)

      Volume: 54(9) Pages: 903-903

    • NAID

      130007479767

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 多世代・経世代影響の非侵襲的バイオマーカーの探索2018

    • Author(s)
      横田理
    • Journal Title

      上原記念生命科学財団 研究報告集

      Volume: 32(110) Pages: 1-5

    • NAID

      40021787128

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 父親の視点からみるDOHaDの重要性と意義:受精卵の遺伝子発現制御を司る雄性生殖細胞系列のエピゲノムに着目して2019

    • Author(s)
      横田理
    • Organizer
      第26回 DOHaD寺子屋研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Development of Whole Body Inhalation System for Well-Dispersed Nanomaterials Toxicity Testing Taquann Direct-Injection Whole Body Inhalation System2019

    • Author(s)
      Taquahashi Y, Yokota S, Morita K, Tsuji M, Hirabayashi Y, Hirose A, Kanno J
    • Organizer
      Society of Toxicology 58th Annual meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 精子形成におけるビタミンAの役割の解明を目指して2018

    • Author(s)
      横田理
    • Organizer
      日本アンドロロジー学会第37回学術大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 大気由来超微小粒子胎仔期曝露により惹起される不安様行動とそれに関連した腦神経回路の同定2018

    • Author(s)
      横田理、武田健
    • Organizer
      第62回日本薬学会関東支部大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 微小粒子胎仔期曝露は慢性的にセロトニン神経活性化を介して不安様行動を惹起する2018

    • Author(s)
      横田理、佐藤央、武田健
    • Organizer
      第4回日本レギュラトリーサイエンス学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Exposure to diesel exhaust particles during the course of gestation increases risk of neurocognitive impairment of male offspring2017

    • Author(s)
      Yokota S, Oshio S, Takeda K
    • Organizer
      10th World Congress on Developmental Origins of Health and Disease (DOHaD 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 超微小粒子胎仔期曝露は社会的隔離により誘発される攻撃性を上昇させる2017

    • Author(s)
      横田理、押尾茂、武田健
    • Organizer
      フォーラム2017:衛生薬学・環境トキシコロジー
    • Related Report
      2017 Research-status Report
  • [Presentation] ΔFosBタンパク質を指標とした神経活動解析と胎仔期微小粒子曝露により惹起される不安様行動との関連2017

    • Author(s)
      横田理、押尾茂、武田健
    • Organizer
      第6回DOHaD学会学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] 胎仔期ディーゼル排ガス曝露により惹起される不安様行動と縫線核 Serotoninニューロンの慢性的活性化2017

    • Author(s)
      横田理、押尾茂、武田健
    • Organizer
      第44回日本毒性学会学術年会
    • Related Report
      2017 Research-status Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/gs1r4v6/

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2017-04-28   Modified: 2021-12-27  

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