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Three-dimensional reconstructed testis as a new tool for studying the development of spermatogenic failure.

Research Project

Project/Area Number 18K09153
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56030:Urology-related
Research InstitutionSt. Marianna University School of Medicine

Principal Investigator

Yoshiike Miki  聖マリアンナ医科大学, 医学部, 研究技術員 (60398964)

Co-Investigator(Kenkyū-buntansha) 岩本 晃明  国際医療福祉大学, 臨床医学研究センター, 教授 (60046117)
佐藤 陽子  東海大学, 生物学部, 教授 (50398963)
仲田 浩規  金沢大学, 医学系, 講師 (80638304)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords3次元再構築 / 精巣 / ハムスター / 停留精巣 / 3次元再構成 / 精子形成 / 3次元再構成 / 精子形成不全
Outline of Final Research Achievements

The aim of the present study was to clarify the precise 3-dimensional (3D) structure of seminiferous tubules in hamsters to serve as a research tool for studying spermatogenesis and spermatogenic failure. We reconstructed all seminiferous tubules in testes from 0-day (new born) and 70-day (adult) Syrian hamsters using serial paraffin sections and high-performance 3D re-construction software. In either age hamster, the numbers of seminiferous tubules were 8-11, in which there were 2-4 dominant tubules accounting for over 80% of the total length. The dominant tubules were occupied the testis from the surface over the circumference to the center, while the others were short and occupied only one side of the testis. Although the procedure used in the present study is simple, it is a powerful tool to analyze organs with complex tubular structures, and will be useful for studying spermatogenesis under normal and pathological states.

Academic Significance and Societal Importance of the Research Achievements

ハムスター精巣を用いての3次元再構築は他に例がなく、また精子形成不全モデル動物を用いての検討も初の試みである。特に、3次元再構築された精巣の全体像を対象とした観察からは、精巣組織の一部を用いた検討からは得られない新たな発見がある。本研究ではモデル動物と精巣の3次元再構築および多様な情報のマッピングを組み合わせることにより、精子形成不全発生過程を経時的・空間的・多面的に観察することが可能になる。またこの結果から、障害が進展しても精子形成が残存している部域の位置や偏りなどの情報が得られれば、ヒトでのMD-TESEによる精子回収率を向上させるための新しい指標を開発する有力な手がかりとして期待できる。

Report

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

    (5 results)

All 2021 2020

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

  • [Journal Article] Three‐dimensional structure of seminiferous tubules in the Syrian hamster2020

    • Author(s)
      Nakata Hiroki、Yoshiike Miki、Nozawa Shiari、Sato Yoko、Iseki Shoichi、Iwamoto Teruaki、Mizokami Atsushi
    • Journal Title

      Journal of Anatomy

      Volume: 238 Issue: 1 Pages: 86-95

    • DOI

      10.1111/joa.13287

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A change in the steroid metabolic pathway in human testes showing deteriorated spermatogenesis2020

    • Author(s)
      Sato Yoko、Asahina Kiyoshi、Yoshiike Miki、Nozawa Shiari、Otoi Takeshige、Iwamoto Teruaki
    • Journal Title

      Reproductive Biology

      Volume: 20 Issue: 2 Pages: 210-219

    • DOI

      10.1016/j.repbio.2020.02.008

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Genome-wide association study of semen volume, sperm concentration, testis size, and plasma inhibin B levels2020

    • Author(s)
      Sato Youichi、Tajima Atsushi、Kiguchi Misaki、Kogusuri Suzu、Fujii Aki、Sato Takehiro、Nozawa Shiari、Yoshiike Miki、Mieno Makiko、Kojo Kosuke、Uchida Masahiro、Tsuchiya Haruki、Yamasaki Kazumitu、Imoto Issei、Iwamoto Teruaki
    • Journal Title

      Journal of Human Genetics

      Volume: 65 Issue: 8 Pages: 683-691

    • DOI

      10.1038/s10038-020-0757-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] ハムスター精細管の三次元構造2021

    • Author(s)
      仲田 浩規、吉池美紀、野澤資亜利、佐藤陽子、関正一、岩本晃明、溝上敦
    • Organizer
      日本アンドロロジー学会第39回学術集会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ハムスター精細管の詳細な三次元構造を明らかにする2020

    • Author(s)
      仲田浩規、吉池美紀、野澤資亜利、佐藤陽子、井関尚一、岩本晃明、溝上敦
    • Organizer
      第125回日本解剖学会総会
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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