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2008 Fiscal Year Annual Research Report

突然変異体と三次元細胞系譜解析とを用いた性分化過程細胞相互作用解析

Research Project

Project/Area Number 19040027
Research InstitutionNational Institute for Basic Biology

Principal Investigator

田中 実  National Institute for Basic Biology, 生殖遺伝学研究室, 准教授 (80202175)

Keywords性分化 / 生殖腺 / メダカ / 生殖顆粒 / vasa / nanos / 生殖細胞 / tudor
Research Abstract

細胞系譜を解析した結果、前年度にメダカ卵巣のニッチ構造と予期される組織構造を見いだした。メダカで発現するnanos遺伝子ファミリーを体系的に解析したところ、そのうちのひとつがニッチ構造の特定生殖細胞に発現していることが見いだされた。その細胞が生殖幹細胞であるかを特定するために、BrdU取込み実験を行ない、分裂の遅い幹細胞の特徴を持つ細胞であることが判明した(Aoki, et.al., Zool. Sci.2009)。
また、生殖細胞に発現する3種の遺伝子産物(TUDOR, NANOS3, OLVAS)の局在を調べ、その局在様式の違いにより生殖細胞の分化状態を識別可能であることを見いだした。全ての段階において、生殖顆粒に3つの蛋白質は局在していたが、生殖腺に入るまではリング用構造をとり、生殖腺に入ってからは球状構造に変化していた。さらに生殖細胞がシスト分裂を始めると局在位置が核膜に近づき、減数分裂期になると核膜に接する大きな顆粒として存在した(Aoki, et.al. Dev. Dyn. 2008)。

  • Research Products

    (13 results)

All 2009 2008 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (6 results) Remarks (1 results)

  • [Journal Article] Expression and syntenic analysis of four nanos genes in medaka2008

    • Author(s)
      Aoki, Y., et.al.
    • Journal Title

      Zool. Sci. 26

      Pages: 112-118

    • Peer Reviewed
  • [Journal Article] Distinct contribution of CXCR 4 b and CXCR 7 / RDC1 receptor systems in regulation of PGC migration revealed by medaka mutants, kazura and yanagi2008

    • Author(s)
      Sasado, T., et.al.
    • Journal Title

      Dev. Biol. 320

      Pages: 328-339

    • Peer Reviewed
  • [Journal Article] Stress-induced environmental changes in a single cell as revealed by fluorescence lifetime imaging2008

    • Author(s)
      Nakabayashi, T., et.al.
    • Journal Title

      Photonchem. Photobiol. Sci. 7

      Pages: 671-674

    • Peer Reviewed
  • [Journal Article] Cross talk between germ cells and gonadal somatic cells is critical for sex differentiation of the gonads in the teleost fish, medaka (Oryzias latipes)2008

    • Author(s)
      Tanaka, M., et.al.
    • Journal Title

      Develop. Growth Differ. 50

      Pages: 273-278.

    • Peer Reviewed
  • [Journal Article] Generation of transgenic medaka using modified bacterial artificial chromosome2008

    • Author(s)
      Nakamura, S., et.al.
    • Journal Title

      Develop. Growth Differ. 50

      Pages: 415-417.

    • Peer Reviewed
  • [Journal Article] Temporal and spatial localization of three germline-specific proteins in medaka2008

    • Author(s)
      Aoki, Y., et.al.
    • Journal Title

      Dev. Dyn. 278

      Pages: 800-807.

    • Peer Reviewed
  • [Presentation] Roles of Germ Cells on Sexual Dimorphism of Gonads2009

    • Author(s)
      Tanaka, M.
    • Organizer
      INSERM Seminar
    • Place of Presentation
      INSERM. Clamart, France
    • Year and Date
      2009-03-23
  • [Presentation] Relations between Germ Cells and Somatic Cells during the process of Sex Differentiation of Gonads2009

    • Author(s)
      Tanaka, M.
    • Organizer
      Graduiertenlolleg
    • Place of Presentation
      Wurzburg Univ. Germany(invited)
    • Year and Date
      2009-02-18
  • [Presentation] Medaka Model Reveals Sexual Bipotentiality of Gonads2008

    • Author(s)
      Tanaka, M.
    • Organizer
      The 2008 General Seminar, The united Graduate School of Agricultural Sciences, Kagoshima Univ.
    • Place of Presentation
      Naha, OKINAWA(invited)
    • Year and Date
      2008-11-05
  • [Presentation] Modes, location and function of germ cells in the ovary of teleost fish, medaka2008

    • Author(s)
      Tanaka, M.
    • Organizer
      Cold Spring Habour Meeting "Germ Cells"
    • Place of Presentation
      New York(Talk)
    • Year and Date
      2008-10-03
  • [Presentation] Importance of Germ Cells in Sex Differentiation2008

    • Author(s)
      Tanaka, M.
    • Organizer
      International Symposium for Gonad and Brain Sex Differentiation
    • Place of Presentation
      Fukuoka(invited)
    • Year and Date
      2008-09-15
  • [Presentation] Importance of Germ Cells for Sex Differentiation2008

    • Author(s)
      Tanaka, M.
    • Organizer
      International Symposium Sex Determination and Gametogenesis in Fish
    • Place of Presentation
      Honolulu, Hawaii(invited)
    • Year and Date
      2008-05-30
  • [Remarks]

    • URL

      http://www.nibb.ac.jp/reprogenetics/

URL: 

Published: 2010-06-11   Modified: 2016-04-21  

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