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Spermatogonial stem cell niche in seasonal breeding mammals

Research Project

Project/Area Number 15K07688
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Animal production science
Research InstitutionNihon University

Principal Investigator

TSUNEKAWA Naoki  日本大学, 生物資源科学部, 教授 (50431838)

Co-Investigator(Kenkyū-buntansha) 九郎丸 正道  岡山理科大学, 獣医学部, 教授 (00148636)
金澤 朋子  日本大学, 生物資源科学部, 助手 (20748470)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords精原幹細胞 / ニッチ / 季節繁殖 / 精子発生 / セルトリ細胞 / 季節繁殖動物 / ハムスター / マウス / セルトリバルブ
Outline of Final Research Achievements

In this study, we identified a valve-like terminal segment of the seminiferous tubules, the Sertoli valve, adjacent to the rete testis as new niche system for GFRalpha1-positive spermatogonia in seasonally breeding hamsters. The Sertoli valve epithelium constitutively expresses GDNF, a major niche factor for SSCs, and supports the stable proliferation and selective maintenance of an A-single subpopulation of GFRalpha1-positive spermatogonia in hamsters. The Sertoli valve region of hamster seminiferous tubules has features that are similar to the stem cell niche in invertebrate gonads. We therefore propose that the Sertoli valve may be a novel niche for A-single GFRalpha1-positive spermatogonia potentially including a SSC population, at the terminal segments of the seminiferous tubules in hamsters.

Academic Significance and Societal Importance of the Research Achievements

種の連綿を支える生殖細胞は、体細胞とは異なる特殊なシステムで制御されている。精子の生産においては、巧妙な細胞分裂様式によって大量生産を可能にしている。その源泉となる細胞が精原幹細胞であり、その細胞が宿る特殊環境をニッチと呼ぶ。本研究課題では、季節によって精巣に大きな変動が認められるハムスターを材料に解析を行ったところ、新たなニッチの発見に至った。これにより、精原幹細胞が局在する新たな領域が明らかとなったことから、精原幹細胞を利用した生殖医療や発生工学的手法による希少動物の保全等、応用利用に必要な基礎的な知見を得た。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (5 results)

All 2018 2017 2016 2015 Other

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

  • [Journal Article] Spermatogonial deubiquitinase USP9X is essential for proper spermatogenesis in mice2017

    • Author(s)
      Kishi Kasane、Uchida Aya、Takase Hinako M、Suzuki Hitomi、Kurohmaru Masamichi、Tsunekawa Naoki、Kanai-Azuma Masami、Wood Stephen A、Kanai Yoshiakira
    • Journal Title

      Reproduction

      Volume: 154 Issue: 2 Pages: 135-143

    • DOI

      10.1530/rep-17-0184

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In vivo dynamics of GFRα1-positive spermatogonia stimulated by GDNF signals using a bead transplantation assay2016

    • Author(s)
      Uchida A, Kishi K, Aiyama Y, Miura K, Takase HM, Suzuki H, Kanai-Azuma M, Iwamori T, Kurohmaru M, Tsunekawa N, Kanai Y
    • Journal Title

      Biochem Biophys Res Commun

      Volume: 476 Issue: 4 Pages: 546-552

    • DOI

      10.1016/j.bbrc.2016.05.160

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Niche for GFRalpha1-Positive Spermatogonia in the Terminal Segments of the Seminiferous Tubules in Hamster Testes2015

    • Author(s)
      Aiyama, Y. Tsunekawa, N. Kishi, K. Kawasumi, M. Suzuki, H. Kanai-Azuma, M. Kurohmaru, M. Kanai, Y.
    • Journal Title

      Stem Cells

      Volume: 33 Issue: 9 Pages: 2811-2824

    • DOI

      10.1002/stem.2065

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] ブタ精巣組織を用いたin vitro精子発生の試み2018

    • Author(s)
      安田拓央、杉山まどか、金澤朋子、森友忠昭、恒川直樹
    • Organizer
      第161回日本獣医学会学術集会・獣医解剖分科会
    • Related Report
      2018 Annual Research Report
  • [Remarks] 東京大学獣医解剖学教室

    • URL

      http://www.vm.a.u-tokyo.ac.jp/kaibo/

    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2020-03-30  

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