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Sex Differences in Pax6-FMRP Feedback Regulation Mechanisms in Neurogenesis

Research Project

Project/Area Number 19H03318
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 46010:Neuroscience-general-related
Research InstitutionTohoku University

Principal Investigator

OSUMI Noriko  東北大学, 医学系研究科, 教授 (00220343)

Co-Investigator(Kenkyū-buntansha) 稲田 仁  東北大学, 医工学研究科, 特任准教授 (60419893)
吉川 貴子  東北大学, 医学系研究科, 助教 (90727851)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2019: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords性差 / ニューロン新生 / Pax6 / FMRP / RNA結合タンパク / 標的遺伝子 / 脆弱X症候群 / 大脳皮質発生 / 雌雄差 / 脳発生 / 雄雌差 / 脳科学 / 基盤・社会脳科学 / 脳計測科学
Outline of Research at the Start

ヒトにおいて脳の大きさや形態、脳の病気の発症頻度について男女差があることは広く知られているが、このような性差が脳の発生発達や維持の過程においてどのように生まれるのかに関して、性ホルモンの影響以外のメカニズムついてはほとんど知られていない。そこで本研究「ニューロン新生におけるPax6-FMRPフィードバック制御機構の性差」では、脳の発生発達維持の根本であるニューロン新生(神経幹細胞の増殖と分化)を制御する転写制御因子Pax6と、重篤な精神遅滞の原因因子FMRPに着目し、胎生期の脳における遺伝子発現の性差を生み出す分子メカニズムの解明を目指す。

Outline of Final Research Achievements

To understand how sex differences in brain morphology and incidence of brain diseases arise during brain development, this study focused on Pax6, a transcriptional regulator of neurogenesis, and FMRP, a causative factor of severe mental retardation. Using embryonic mouse brain samples, we identified target mRNAs of the RNA-binding protein FMRP and integrated them with RNA-seq data from the embryonic cortical primordium, where neurogenesis is actively occurring, to identify genes that show sex differences in their expression levels. From the results obtained, we identified FMRP target mRNAs that are differentially expressed in males and females, and identified FMRP regulatory molecules other than Pax6 that show sex differences.

Academic Significance and Societal Importance of the Research Achievements

ヒトにおいて脳の形態や脳疾患の発症頻度に男女差があることは広く知られている。しかしながら、このような性差が脳の発生発達の過程においてどのように生まれるのかについて、性ホルモンの影響以外のメカニズムは未知である。そこで本研究では、脳の発生発達維持の根本であるニューロン新生を制御する転写制御因子Pax6と、重篤な精神遅滞の原因因子FMRPに着目し、胎生期の脳における遺伝子発現の性差を生み出す分子メカニズムの一端を解明した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (13 results)

All 2021 2020 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (7 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Multiple Functions of the Dmrt Genes in the Development of the Central Nervous System2021

    • Author(s)
      Kikkawa Takako、Osumi Noriko
    • Journal Title

      Frontiers in Neuroscience

      Volume: 15 Pages: 789583-789583

    • DOI

      10.3389/fnins.2021.789583

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Autism-Related Transcription Factors Underlying the Sex-Specific Effects of Prenatal Bisphenol A Exposure on Transcriptome-Interactome Profiles in the Offspring Prefrontal Cortex2021

    • Author(s)
      Kanlayaprasit Songphon、Thongkorn Surangrat、Panjabud Pawinee、Jindatip Depicha、Hu Valerie W.、Kikkawa Takako、Osumi Noriko、Sarachana Tewarit
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 24 Pages: 13201-13201

    • DOI

      10.3390/ijms222413201

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detection of <scp>REST</scp> expression in the testis using epitope‐tag knock‐in mice generated by genome editing2021

    • Author(s)
      Kimura Ryuichi、U. Inoue Yukiko、Kikkawa Takako、Tatehana Misako、Morimoto Yuki、Inada Hitoshi、Oki Shinya、Inoue Takayoshi、Osumi Noriko
    • Journal Title

      Developmental Dynamics

      Volume: 251 Issue: 3 Pages: 525-535

    • DOI

      10.1002/dvdy.417

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of FMRP target mRNAs in the developmental brain: FMRP might coordinate Ras/MAPK, Wnt/β-catenin, and mTOR signaling during corticogenesis2020

    • Author(s)
      Casingal Cristine R.、Kikkawa Takako、Inada Hitoshi、Sasaki Yukio、Osumi Noriko
    • Journal Title

      Molecular Brain

      Volume: 13 Issue: 1 Pages: 1-13

    • DOI

      10.1186/s13041-020-00706-1

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Identification of FMRP target mRNAs in the developmental brain: FMRP might coordinate mTOR signaling during corticogenesis.2021

    • Author(s)
      Takako Kikkawa, Cristine R. Casingal, Yukiko U. Inoue, Sara Ebrahimiazar, Hitoshi Inada, Noriko Osumi
    • Organizer
      7th Congress of AsCNP
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Identification of motor proteins mediating basal transport of Cyclin D2 mRNA in the neural stem/progenitor cells.2021

    • Author(s)
      Sharmin Naher, Takako Kikkawa, Noriko Osumi
    • Organizer
      The 80th Fujiwara seminar “Molecular and cellular mechanisms of brain systems generating individuality”
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of the role of gender difference in FMRP mRNA targets during corticogenesis2021

    • Author(s)
      Sara Ebrahimiazar, Takako Kikkawa, Noriko Osumi
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Identification of motor proteins mediating basal transport of mRNA of a cell cycle regulator Cyclin D2 in the neural stem/progenitor cells.2021

    • Author(s)
      Sharmin Naher, Takako Kikkawa, Noriko Osumi
    • Organizer
      23rd Biennial Meeting of the International Society of Developmental Neuroscience
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Identification of FMRP mRNA targets during corticogenesis2021

    • Author(s)
      Cristine R. Casingal, Takako Kikkawa, Hitoshi Inada, Noriko Osumi
    • Organizer
      第14回神経発生討論会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Enhanced mTOR signaling activity in Fmr1 knockout embryonic brain during corticogenesis2020

    • Author(s)
      Cristine R. Casingal, Takako Kikkawa, Hitoshi Inada, Noriko Osumi
    • Organizer
      新学術領域研究「個性」創発脳第5回領域会議
    • Related Report
      2020 Annual Research Report
  • [Presentation] Identification of FMRP target genes expressed during corticogenesis2020

    • Author(s)
      Cristine R. Casingal, Takako Kikkawa, Hitoshi Inada, Noriko Osumi
    • Organizer
      NPBPPP 2020合同年会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 指定難病脆弱 X 症候群発症の新たな分子メカニズムの解明

    • URL

      https://www.tohoku.ac.jp/japanese/2020/12/press20201216-01-fxs.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] NewInsightsintoFragileXSyndromeandtheFetalBrain

    • URL

      https://www.tohoku.ac.jp/en/press/new_insights_fxs.html

    • Related Report
      2020 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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