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Precise regulation of SOX9 expression during gonadal development by the testis specific enhancers using a genetically humanized mouse model

Research Project

Project/Area Number 20K18208
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionNational Center for Child Health and Development

Principal Investigator

Tsuji-Hosokawa Atsumi  国立研究開発法人国立成育医療研究センター, システム発生・再生医学研究部, (非)研究員 (40842414)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsSox9 / sex determination / testis / enhancer / regulatory region / 精巣分化 / SOX9 / エンハンサー / 精巣形成 / SRY / ゲノムヒト化 / 性分化疾患
Outline of Research at the Start

本研究は、ヒトにおける詳細な生殖腺分化機構を解明するため、性分化関連遺伝子の発現調節領域について、対象領域のマウスとヒトのゲノム配列を置換したゲノムヒト化マウスを用いて、生体内での機能解析を行う。
我々はマウスで近年同定された精巣形成マスター遺伝子Sox9の発現調節領域 (mXYSRa)と近似した配列をヒトSOX9の近接領域に同定した (hXYSRa)。これらを置換したマウスを作製し、その表現型やSox9発現量を観察する。さらに同配列内に作用する結合因子同定も目指す。加えてSOX9に同定された複数の発現調節領域について同様のマウスを作製し、精巣形成における量的・時間的寄与について解析する。

Outline of Final Research Achievements

SOX9/Sox9 is a master gene for testis development. This study aimed to analyze function of candidate sequence for human SOX9 enhancer, hXYSRa, in in vivo setting. 1) in vitro reporter assay utilizing luciferase expression plasmid revealed enhancer function of hXYSRa. We identified one of transcriptional factor binding motifs within the sequence. 2) We generated genetically humanized mice of Sox9 enhancer. The homologous Sox9 enhancer region in murine genome was replaced with hXYSRa sequence (hXYSRa sub mice) and development of reproductive system in the model mice was screened. Some of hXYSRa sub/sub mice with XY karyotype showed virilization of external/internal genitalia when the line was backcrossed to the DBA/2 strain and overexpressed human SRY. This result suggested regulatory regions in human genome can compensate homologous sequence in murine genome and can be analyzed in the animal model.

Academic Significance and Societal Importance of the Research Achievements

本研究では、ヒトSOX9エンハンサー候補領域について関連転写因子の結合部位を明らかにし、生殖腺分化に重要な遺伝子の発現調節解明に寄与した。また発現調節領域について、マウスゲノムの相同領域とヒト相同配列を置換した場合、一定条件においてはヒトエンハンサーをモデル生物内で機能解析できる可能性が示唆され、non coding regionの機能解析において重要な知見をもたらしたと言える。

Report

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

    (5 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (3 results)

  • [Journal Article] SOX9 and SRY binding sites on mouse mXYSRa/Enh13 enhancer redundantly regulate <i>Sox9</i> expression to varying degrees2022

    • Author(s)
      Ogawa Yuya、Terao Miho、Tsuji-Hosokawa Atsumi、Tsuchiya Iku、Hasegawa Midori、Takada Shuji
    • Journal Title

      Human Molecular Genetics

      Volume: 32 Issue: 1 Pages: 55-64

    • DOI

      10.1093/hmg/ddac184

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Human SRY Expression at the Sex-determining Period is Insufficient to Drive Testis Development in Mice2021

    • Author(s)
      Tsuji-Hosokawa Atsumi、Ogawa Yuya、Tsuchiya Iku、Terao Miho、Takada Shuji
    • Journal Title

      Endocrinology

      Volume: 163 Issue: 1

    • DOI

      10.1210/endocr/bqab217

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] In vivo functional analysis of a candidate for human regulatory element related to SOX9 expression using a genetically humanized mouse model2022

    • Author(s)
      辻敦美、小川湧也、寺尾美穂、菊池咲希、土屋育、鹿島田健一、高田修治
    • Organizer
      日本小児内分泌学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] In vivo functional analysis of a candidate for human regulatory element related to SOX9 expression using a genetically humanized mouse model2021

    • Author(s)
      辻 敦美
    • Organizer
      第54回日本小児内分泌学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] ゲノムヒト化マウスモデルによるin vivoでのヒトSOX9発現調節候補領域の機能解析2020

    • Author(s)
      辻 敦美
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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