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The study of progenitor dedifferentiation in mouse testis

Research Project

Project/Area Number 20H03168
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 42030:Animal life science-related
Research InstitutionNational Institute for Basic Biology (2021-2023)
Institute of Physical and Chemical Research (2020)

Principal Investigator

Suzuki Shinnosuke  基礎生物学研究所, 生殖細胞研究部門, 助教 (00755994)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords精子幹細胞 / 精巣 / 不均一性 / 培養系 / シングルセル / 未分化精原細胞 / 脱分化 / クロマチン動態
Outline of Research at the Start

本研究では、精巣内のProgenitorで生じるSSCsへの脱分化誘導メカニズムの全貌解明を目的とし、申請者が同定した In vivoの4種類の細胞集団をそれぞれ可視化し、細胞系譜をモニタリングする。次に、 In vivoの4種類の細胞集団における遺伝子発現の変化および染色体動態の変化を解析し、申請者が有するIn vitro分化系における継時的な解析結果と比較することにより、In vitro分化系とIn vivoの細胞系譜の関連性を確認する。最終的には、In vivoでProgenitorの脱分化を誘導する因子を同定することを目指す。

Outline of Final Research Achievements

In the mouse testis, clones of undifferentiated spermatogonia can interconvert between spermatogonial stem cells (SSCs) and progenitors, but the mechanism behind this process remains poorly understood. In this study, we aimed to understand the mechanism of interconversion between SSCs and progenitors by using single-cell RNA-seq analysis, analyzing reporter mice which can monitor this process, and developing an experimental system to efficiently analyze this process in vitro. As the results from RNA velocity analysis, we found a possibility that cells, which annotated the intermediate state between SSCs and progenitors could interconvert between SSCs and progenitors. Finally, our results strongly suggest that the inhibition of mTORC1 is involved in the interconversion between SSCs and progenitors.

Academic Significance and Societal Importance of the Research Achievements

本研究により、マウス未分化精原細胞に含まれる亜集団を再定義し、亜集団内で可逆的な転換が生じている可能性を示すことができた。また、その可逆的な転換にmTORC1シグナルの抑制が関与している可能性も見出すことができた。ヒトにおいても少数のProgenitorがSSCsへと脱分化していることが1細胞レベルの遺伝子発現解析から予測されているため(Guo J et al., 2018, Cell Res)、mTORC1の抑制を活用することで、男性不妊を改善する治療法の確立に繋がることを期待する。

Report

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

    (9 results)

All 2024 2023 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] マウス精子幹細胞が長期間精子を生産する戦略2024

    • Author(s)
      鈴木伸之介, 吉田松生
    • Volume
      42(3)
    • Pages
      408
    • DOI

      10.18958/7407-00001-0001144-00

    • Related Report
      2023 Annual Research Report
  • [Journal Article] An mTORC1-dependent switch orchestrates the transition between mouse spermatogonial stem cells and clones of progenitor spermatogonia2021

    • Author(s)
      Suzuki Shinnosuke、McCarrey John R.、Hermann Brian P.
    • Journal Title

      Cell Reports

      Volume: 34 Issue: 7 Pages: 108752-108752

    • DOI

      10.1016/j.celrep.2021.108752

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Differential RA responsiveness among subsets of mouse late progenitor spermatogonia2021

    • Author(s)
      Suzuki Shinnosuke、McCarrey John R、Hermann Brian P
    • Journal Title

      Reproduction

      Volume: 161 Issue: 6 Pages: 645-655

    • DOI

      10.1530/rep-21-0031

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reconstitution of prospermatogonial specification in vitro from human induced pluripotent stem cells2020

    • Author(s)
      Hwang Young Sun、Suzuki Shinnosuke、Seita Yasunari、Ito Jumpei、Sakata Yuka、Aso Hirofumi、Sato Kei、Hermann Brian P.、Sasaki Kotaro
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 5656-5656

    • DOI

      10.1038/s41467-020-19350-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] マウス精子幹細胞の培養系の現状と未来2024

    • Author(s)
      鈴木 伸之介
    • Organizer
      第4回有性生殖研究会「未来へ向けた生殖研究」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] マウス精子幹細胞株の不均一性の実態とその制御2023

    • Author(s)
      鈴木 伸之介, 吉田 松生, Brian P. Herman, 阿部 訓也
    • Organizer
      第70回日本実験動物学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] マウス精子幹細胞の不均一性は制御できるのか?2023

    • Author(s)
      鈴木伸之介、吉田松生、Brian P Hermann、阿部訓也
    • Organizer
      第116回日本繁殖生物学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 加齢過程で頑強に維持される精子幹細胞システム2023

    • Author(s)
      河原輝宙, 中川俊徳, 鈴木伸之介, 加茂祐樹, 種村健太郎, 吉田松生, 原健士朗
    • Organizer
      第116回日本繁殖生物学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Differential RA responsiveness among subsets of mouse late progenitor spermatogonia2022

    • Author(s)
      Shinnosuke Suzuki, John R McCarrey, and Brian P Hermann
    • Organizer
      Fertility Conference 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited

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

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