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Development of Retrotransposon Expression Control for High-Efficiency In Vitro Spermatogenesi

Research Project

Project/Area Number 20K21657
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 56:Surgery related to the biological and sensory functions and related fields
Research InstitutionYokohama City University

Principal Investigator

SATO Takuya  横浜市立大学, 医学部, 講師 (70599505)

Co-Investigator(Kenkyū-buntansha) 古目谷 暢  横浜市立大学, 医学部, 助教 (60721082)
Project Period (FY) 2020-07-30 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords精子形成 / 精巣 / レトロトランスポゾン / 逆転写酵素阻害剤 / 体外精子形成誘導 / 器官培養 / 胎仔精巣 / LINE1
Outline of Research at the Start

我々はマウス精巣を器官培養することで精子形成過程をin vitroでの再現に成功したが、その精子形成誘導効率が低いことが課題である。最近、逆転写酵素阻害剤を培地に添加し培養するとin vitro精子形成効率が向上することを発見した。逆転写酵素阻害剤はレトロ転移を抑制するという作用機序から、in vitro精子形成を阻害する原因はレトロトランスポゾンにあると仮説を立てた。そこで本研究課題では、in vitro精子形成とレトロトランスポゾンとの関連性を明らかにし、誘導効率低下の原因を探索し特定することを目的とする。それによって高効率精子形成誘導法の開発を実現し、さらにはヒトのin vitro精子形成誘導法の開発へと発展させる。

Outline of Final Research Achievements

By organ culturing neonatal mouse testes, it has become possible to induce differentiation of spermatogonial stem cells into sperm. However, inducing spermatogenesis in vitro from more immature fetal testes (Embryonic day 12.5) has been challenging. In this study, we achieved, for the first time, the induction of differentiation up to round spermatids and elongating spermatids by organ culturing fetal testes in a medium supplemented with a reverse transcriptase inhibitor. Furthermore, to confirm the normality of these spermatid cells, we conducted microinsemination experiments and successfully obtained healthy offspring. These results demonstrate the successful progression of in vitro spermatogenesis in fetal testes.

Academic Significance and Societal Importance of the Research Achievements

本研究により、逆転写酵素阻害剤が体外精子形成の誘導効率を改善することがあきらかとなり、新たに胎仔期精巣の培養法を確立することができた。これによって胎仔期精巣の発達から出生後の精子形成の開始、精子完成にいたる過程が体外で解析が可能になった。本研究において開発した胎仔精巣の培養は、胎仔期の精巣発生モデルとして、 発生学的な観点から新たな情報を提供できることが期待される。

Report

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

    (14 results)

All 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (3 results) (of which Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] Queen’s University Belfast(英国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Temperature sensitivity of DNA double-strand break repair underpins heat-induced meiotic failure in mouse spermatogenesis2022

    • Author(s)
      Hirano Kodai、Nonami Yuta、Nakamura Yoshiaki、Sato Toshiyuki、Sato Takuya、Ishiguro Kei-ichiro、Ogawa Takehiko、Yoshida Shosei
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 504-504

    • DOI

      10.1038/s42003-022-03449-y

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sertoli cell replacement in explanted mouse testis tissue supporting host spermatogenesis†2021

    • Author(s)
      Higuchi Kazusa、Matsumura Takafumi、Akiyama Haruhiko、Kanai Yoshiakira、Ogawa Takehiko、Sato Takuya
    • Journal Title

      Biology of Reproduction

      Volume: 105 Issue: 4 Pages: 934-943

    • DOI

      10.1093/biolre/ioab104

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] In vitro reconstitution of the whole male germ-cell development from mouse pluripotent stem cells2021

    • Author(s)
      Ishikura Yukiko、Ohta Hiroshi、Sato Takuya、Murase Yusuke、Yabuta Yukihiro、Kojima Yoji、Yamashiro Chika、Nakamura Tomonori、Yamamoto Takuya、Ogawa Takehiko、Saitou Mitinori
    • Journal Title

      Cell Stem Cell

      Volume: 28 Issue: 121 Pages: 2167-2179.e9

    • DOI

      10.1016/j.stem.2021.08.005

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rat in vitro spermatogenesis promoted by chemical supplementations and oxygen-tension control2021

    • Author(s)
      Matsumura Takafumi、Sato Takuya、Abe Takeru、Sanjo Hiroyuki、Katagiri Kumiko、Kimura Hiroshi、Fujii Teruo、Tanaka Hiromitsu、Hirabayashi Masumi、Ogawa Takehiko
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 3458-3458

    • DOI

      10.1038/s41598-021-82792-2

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spatially Fractionated Microbeam Analysis of Tissue-sparing Effect for Spermatogenesis2020

    • Author(s)
      Fukunaga Hisanori、Kaminaga Kiichi、Sato Takuya、Butterworth Karl T.、Watanabe Ritsuko、Usami Noriko、Ogawa Takehiko、Yokoya Akinari、Prise Kevin M.
    • Journal Title

      Radiation Research

      Volume: 194 Issue: 6 Pages: 698-706

    • DOI

      10.1667/rade-19-00018.1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Time-course microarray transcriptome data of in vitro cultured testes and age-matched in vivo testes2020

    • Author(s)
      Abe Takeru、Nishimura Hajime、Sato Takuya、Suzuki Harukazu、Ogawa Takehiko、Suzuki Takahiro
    • Journal Title

      Data in Brief

      Volume: 33 Pages: 106482-106482

    • DOI

      10.1016/j.dib.2020.106482

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transcriptome analysis reveals inadequate spermatogenesis and immediate radical immune reactions during organ culture in?vitro spermatogenesis2020

    • Author(s)
      Abe Takeru、Nishimura Hajime、Sato Takuya、Suzuki Harukazu、Ogawa Takehiko、Suzuki Takahiro
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 530 Issue: 4 Pages: 732-738

    • DOI

      10.1016/j.bbrc.2020.06.161

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Antioxidant Vitamins and Lysophospholipids Are Critical for Inducing Mouse Spermatogenesis Under Organ Culture Conditions2020

    • Author(s)
      Sanjo H, Yao T, Katagiri K, Sato T, Matsumura T, Komeya M, Yamanaka H, Yao M, Matsuhisa A, Asayama Y, Ikeda K, Kano K, Aoki J, Arita M, Ogawa T.
    • Journal Title

      The FASEB Journal

      Volume: online ahead of print Issue: 7 Pages: 9480-9497

    • DOI

      10.1096/fj.202000245r

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Tissue-Sparing Effect of Spatially Fractionated X-rays for Maintaining Spermatogenesis: A Radiobiological Approach for the Preservation of Male Fertility after Radiotherapy2020

    • Author(s)
      Fukunaga Hisanori、Kaminaga Kiichi、Sato Takuya、Watanabe Ritsuko、Ogawa Takehiko、Yokoya Akinari、Prise Kevin M.
    • Journal Title

      Journal of Clinical Medicine

      Volume: 9 Issue: 4 Pages: 1089-1089

    • DOI

      10.3390/jcm9041089

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 胎仔マウス精巣を用いたin vitro精子形成2022

    • Author(s)
      西田麻由香、佐藤卓也、小川毅彦
    • Organizer
      第27回日本生殖内分泌学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 精子形成過程の体外再構築2022

    • Author(s)
      佐藤卓也
    • Organizer
      第67回日本生殖医学会学術講演会・総会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 体外で精子をつくる2022

    • Author(s)
      佐藤卓也
    • Organizer
      第115回日本繁殖生物学会東京大会市民公開講座
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Remarks] 雄性生殖細胞の全分化過程の試験管内再構成に成功

    • URL

      https://www.yokohama-cu.ac.jp/amedrc/news/202109ogawa_stem.html

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-08-03   Modified: 2024-01-30  

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