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Elucidation of the mechanism of microglial transition in brain construction and its significance

Research Project

Project/Area Number 17K08500
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field General anatomy (including histology/embryology)
Research InstitutionKindai University (2019-2020)
Aichi Medical University (2017-2018)

Principal Investigator

Komada Munekazu  近畿大学, 理工学部, 講師 (90523994)

Co-Investigator(Kenkyū-buntansha) 長尾 哲二  近畿大学, 理工学部, 教授 (30351563)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsミクログリア / 脳内炎症 / 大脳皮質 / 海馬歯状回 / 神経新生 / 母胎内環境 / バルプロ酸 / ストレス / 感染症 / 発達障害 / フタル酸エステル / ビスフェノールA / 神経発達毒性 / エタノール / 視床下部 / 神経炎症 / 先天異常 / 解剖学 / 神経科学 / 脳・神経 / 細胞・組織 / 発生・分化
Outline of Final Research Achievements

The central nerve system during the prenatal period, in which cells proliferate, neurognesis, and neuronal migration, is highly sensitive to environmental factors such as chemical substances, stress exposure, and infectious diseases. Effects on cell dynamics such as neurogensis, maturation, and neuronal projection during this period can cause congenital malformations and brain dysfunctio0n.
We focused on abnormal activation of microglia and inflammation in the developing brain. These have been shown to be widespread phenomena due to prenatal exposure to various chemicals and stresses, as well as infectious diseases. In other words, it was shown that morphogenesis and functional maturation of the cerebral cortex and hippocampal dentate gyrus may be hindered by inflammation in the brain caused by various environmental factors, which may cause congenital malformations and developmental disorders.

Academic Significance and Societal Importance of the Research Achievements

胎児期の母胎内環境は、先天奇形や発達障害などの原因となるだけでなく、成熟してからの生活習慣病や精神疾患とも関連することが報告されている。その原因の一つに、化学物質やストレス曝露などによる脳内炎症があり、炎症関連因子によって活性化されたミクログリアによって、組織構築や神経投射に影響が及ぼされている可能性が示された。先天奇形や発達障害は治療することが難しいため、予防することが重要である。つまり、脳内炎症やミクログリアの異常な活性化が、先天奇形や発達障害の予防法のターゲットとなりうる可能性を示すことができた。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 2017

All Journal Article (6 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Prenatal and postnatal bisphenol A exposure inhibits postnatal neurogenesis in the hippocampal dentate gyrus2020

    • Author(s)
      Komada M, Nagao T, Kagawa N.
    • Journal Title

      Journal of Toxicological Sciences

      Volume: 45 Issue: 10 Pages: 639-650

    • DOI

      10.2131/jts.45.639

    • NAID

      130007921909

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Postnatal di-2-ethylhexyl phthalate exposure affects hippocampal dentate gyrus morphogenesis2020

    • Author(s)
      Komada M, Nagao T, Kagawa N.
    • Journal Title

      Journal of Applied Toxicology

      Volume: 40 Issue: 12 Pages: 1673-1682

    • DOI

      10.1002/jat.4027

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Maternal administration of bisphenol A alters the microglial profile in the neocortex of mouse weanlings2020

    • Author(s)
      Kagawa Nao、Nagao Tetsuji
    • Journal Title

      Congenital Anomalies

      Volume: - Issue: 5 Pages: 142-146

    • DOI

      10.1111/cga.12370

    • NAID

      50014579010

    • Related Report
      2019 Research-status Report
  • [Journal Article] The neonicotinoids acetamiprid and imidacloprid impair neurogenesis and alter the microglial profile in the hippocampal dentate gyrus of mouse neonates2019

    • Author(s)
      Nakayama Akira、Yoshida Manami、Kagawa Nao、Nagao Tetsuji
    • Journal Title

      Journal of Applied Toxicology

      Volume: 39 Issue: 6 Pages: 877-887

    • DOI

      10.1002/jat.3776

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bisphenol A exposure induces increased microglia and microglial related factors in the murine embryonic dorsal telencephalon and hypothalamus2018

    • Author(s)
      Takahashi Mifumi、Komada Munekazu、Miyazawa Ken、Goto Shigemi、Ikeda Yayoi
    • Journal Title

      Toxicology Letters

      Volume: 284 Pages: 113-119

    • DOI

      10.1016/j.toxlet.2017.12.010

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mechanisms underlying neuro-inflammation and neurodevelopmental toxicity in the mouse neocortex following prenatal exposure to ethanol2017

    • Author(s)
      Komada Munekazu、Hara Nao、Kawachi Satoko、Kawachi Kota、Kagawa Nao、Nagao Tetsuji、Ikeda Yayoi
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 4934-4934

    • DOI

      10.1038/s41598-017-04289-1

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Prenatal exposure to valproic acid induces dysplasia of the neocortex and neuro-inflammation in mice.2019

    • Author(s)
      Munekazu Komada, Haruka Kamiyama, Nao Kagawa, Tetsuji Nagao
    • Organizer
      第59回日本先天異常学術集会 13th World Congress of The International Cleft Lip and Palate Foundation CLEFT2019 (合同開催)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Mechanisms underlying and neurodevelopmental and immunological toxicity in the mouse neocortex following prenatal exposure to ethanol.2018

    • Author(s)
      Komada M, Okada S
    • Organizer
      WCP2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 胎児期低用量ビスフェノールA曝露は炎症を伴うミクログリアの異常を誘発する2017

    • Author(s)
      駒田致和、高橋美文、長尾哲二、池田やよい
    • Organizer
      第57回日本先天異常学会学術集会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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