• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigation of negative regulators for proliferation and development of germ cells

Research Project

Project/Area Number 19K22437
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionNational Institute of Genetics

Principal Investigator

Sakai Noriyoshi  国立遺伝学研究所, 遺伝形質研究系, 准教授 (50202081)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords生殖幹細胞 / 組織微小環境 / 全胚移植法 / ゼブラフィッシュ / 分化型生殖細胞 / 全胚移植 / 生殖系幹細胞 / 細胞増殖阻害因子 / 増殖・分化阻害因子 / 成体皮下移植
Outline of Research at the Start

ゼブラフィッシュ胚を成体に皮下移植すると、血管が宿主と繋がり胚が成長するが、宿主の生殖細胞が存在すると移植胚生殖巣の形成が阻害されることを見つけた。本研究では、この実験結果をもとに胚の生殖細胞の発達に負の影響をもたらす成体生殖巣因子の同定を目的とする。生殖細胞の増殖・分化を負に制御する因子の解明は、成体組織の幹細胞維持システムに新たな概念をもたらすことが期待される。

Outline of Final Research Achievements

To explore intrinsic changes in micro environments of living organs with aging, we analyzed interaction of the heterochronic parabiotic testes after transplantation of whole living larvae as grafts in an immunodeficient adult zebrafish. When we used meioc mutants whose testes have only germ-line stem cells (GSCs) as a host, development of testes in grafted larvae was not affected, but GSCs of the host decreased. This result showed a possibility that factors that depend on differentiating germ cells suppress proliferation of GSCs. In addition, we developed transplantation experiments using ovarian germ cell aggregates to explore interaction between oocytes and GSCs.

Academic Significance and Societal Importance of the Research Achievements

生体組織は胚性期に未分化細胞により器官原器が形成され、成長過程を経て最終的な成体の組織へと成熟する。成体組織は少数の成体幹細胞と多数の分化型細胞により構成され、胚性期の未分化細胞により構成される器官原器とは、その微小環境も質的に異なるものと予想されるが、その実体はほとんどわかっていない。本課題の成体幹細胞の増殖を負に制御する因子もまだ見つけられていない要素で、その発見は成体組織の幹細胞維持システムに新たな概念をもたらすことが期待される。

Report

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

    (5 results)

All 2021 2020 Other

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

  • [Journal Article] Sycp1 Is Not Required for Subtelomeric DNA Double-Strand Breaks but Is Required for Homologous Alignment in Zebrafish Spermatocytes2021

    • Author(s)
      Imai Yukiko、Saito Kenji、Takemoto Kazumasa、Velilla Fabien、Kawasaki Toshihiro、Ishiguro Kei-ichiro、Sakai Noriyoshi
    • Journal Title

      Frontiers in Cell and Developmental Biology

      Volume: 9 Pages: 664377-664377

    • DOI

      10.3389/fcell.2021.664377

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Sycp1 is not required for subtelomeric DNA double-strand breaks but is required for homologous alignment in zebrafish spermatocytes2021

    • Author(s)
      Yukiko Imai, Noriyoshi Sakai
    • Organizer
      The Students and Postdocs Meiosis Workshop, v3.0 - PDSM 2021, online conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The synaptonemal complex and recombination in zebrafish meiosis2020

    • Author(s)
      Yukiko Imai
    • Organizer
      The 43th Annual Meeting of the Molecular Biology Society of Japan, online conference, Symposium 「Dynamic and structural regulation of chromosome inheritance in meiosis」
    • Related Report
      2020 Annual Research Report
  • [Book] ゼブラフィッシュ実験ガイド、平田普三編、第2章 系統2020

    • Author(s)
      酒井則良
    • Total Pages
      7
    • Publisher
      朝倉書店
    • ISBN
      9784254171730
    • Related Report
      2020 Annual Research Report
  • [Remarks] 国立遺伝学研究所小型魚類開発研究室

    • URL

      http://modelfish.sakura.ne.jp

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-07-04   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi