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2010 Fiscal Year Annual Research Report

魚類の性分化過程と生殖機能の遺伝的・環境的制御メカニズムの解明

Research Project

Project/Area Number 22380109
Research InstitutionTokyo University of Marine Science and Technology

Principal Investigator

STRUSSMANN C.A.  東京海洋大学, 海洋科学部, 教授 (10231052)

Keywords生理 / 生殖 / 魚類 / 性分化 / 温度
Research Abstract

本研究では、魚類の性分化過程と生殖機能の遺伝的・環境的制御の分子生物学・生化学・生理学的背景の解明を目標としている。温度に対する性分化・生殖機能関連遺伝子の発現動態とその調節については、まず、温度依存型性決定を示すペヘレイOdontesthes bonariensisにおける生殖腺刺激ホルモン(FSH・LH)の受容体遺伝子のクローニングと構造解析および雌誘発温度、性的中立温度と雄誘発温度での性分化における発現量を測定し、精巣分化には低レベルのFshとLhβサブユニット遺伝子の発現と高レベルのLh受容体遺伝子の発現が関与していると判明した。また、本種のcyp11a1とcyp11b1遺伝子のクローニングと構造解析および性分化時期における発現量を測定し、精巣分化(dmrt1, amh, sox9, nr5a1, sf-1)のと卵巣分化(cyp19a1a)の関連のマーカー遺伝子の発現量と照らし合わせた結果、雄誘発温度ではcyp11b1の発現が高く、精巣分化に重要な役割を担うことが示唆された。さらに、遺伝型・温度依存型性決定および高温感受性関連遺伝子の探索について、異なる水温でのペヘレイ仔魚のDNAマイクロアレイ解析を行った結果、多数の候補遺伝子を同定し、発現解析では特にndrg3、pen-とhsp90遺伝子は性分化との関連性が示唆された。なお、温度依存型性決定を持つペヘレイとは対照的に遺伝的性決定を持つ同族のパタゴニアペヘレイO.hatcheriとの交雑種における性分化過程の組織学的プロセスおよび水温の影響を明らかにした。メダカOryzias latipesについては、生殖細胞の高温感受性ならびに突然変異の発生率を左右するY型DNAポリメラーゼの一種であるRev1遺伝子のクローニングと構造解析し、リアルタイムPCR法により高温ストレス下個体の生殖腺における本遺伝子の発現が優位に上昇することを見出した。また、メダカの成魚を1~6週間36~38℃下で高温曝露し、組織学的解析および生殖細胞特有のVasa遺伝子の発現解析を行った結果、生殖腺は1週間より退行変性し、4~6週間で生殖細胞の数が著しく減少することが判明した。

  • Research Products

    (14 results)

All 2011 2010

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (6 results)

  • [Journal Article] Temperature effects on sex differentiation of the reciprocal hybrids of Odontesthes bonariensis and O.hatcheri (Atherinopsidae)2011

    • Author(s)
      J.Inazawa, R.S.Hattori, M.Oura, M.Yokota , C.A.Strussmann
    • Journal Title

      Aquaculture Research

      Volume: 印刷中

    • Peer Reviewed
  • [Journal Article] Analysis of sexually dimorphic expression of genes at early gonadogenesis ofpejerrey Odontesthes bonariensis using a heterologous microarray2011

    • Author(s)
      J.I.Fernandino, J.T.Popesku, B.Paul-Prasanth, H.Xiong, R.S.Hattori, M.Oura, CA Strussmann, G.M.Somoza, M.Matsuda, Y.Nagahama, VL.Trudeau
    • Journal Title

      Sexual Development

      Volume: 5 Pages: 89-101

    • Peer Reviewed
  • [Journal Article] Implications of climate change for the reproductive capacity and survival of Atherinopsid fish species2010

    • Author(s)
      C.A. Strussmann, D.O. Conover, G.M. Somoza, and L.A. Miranda
    • Journal Title

      Journal of Fish Biology

      Volume: 77 Pages: 1818-1834

    • DOI

      doi:10.1111/j.1095-8649.2010.02780.x1

    • Peer Reviewed
  • [Journal Article] Vulnerability of silverside (Odontesthes bonariensis) populations to climatechange in pampean lakes of Argentina2010

    • Author(s)
      G.A.Kopprio, R.H.Freije, C.A.Strussmann, G.Kattner, M.S.Hoffineyer, C.A.Popovich, R.J.Lara
    • Journal Title

      Journal of Fish Biology

      Volume: 77 Pages: 1856-1866

    • Peer Reviewed
  • [Journal Article] Molecular cloning and expression analysis of Fshr and Lhr in relation to Fshb and Lhb subunits during the period of temperature-dependent sexdetermination in pejerrey Odontesthes bonariensis2010

    • Author(s)
      T.Shinoda, L.A.Miranda, K.Okuma, R.S.Hattori, J.I.Fernandino, G.Yoshizaki, G.M.Somoza, C.A.Strussmann
    • Journal Title

      Molecular Reproduction and Development

      Volume: 77 Pages: 521-532

    • Peer Reviewed
  • [Journal Article] Molecular characterization of cypllal and cypllbl and their geneexpression profile in pejerrey during early gonadal development2010

    • Author(s)
      M.Blasco, J.I.Fernandino, L.G.Guilgur, C.A.Strussmann, G.M.Somoza, D.Vizziano- Cantonnet
    • Journal Title

      Comparative Biochemistry and Physiology A(Molecular and Integrative Physiology)

      Volume: 156 Pages: 110-118

    • Peer Reviewed
  • [Journal Article] Construction of a genetic map and development of DNA markers linked to the sex determining locus in the Patagonian pejerrey (Odontesthes hatcherl)2010

    • Author(s)
      E.Koshimizu, C.A.Strussmann, N.Okamoto, H.Fukuda, T.Sakamoto
    • Journal Title

      Marine Biotechnology

      Volume: 12 Pages: 8-13

    • Peer Reviewed
  • [Journal Article] Establishment of a strain inheriting a sex-linked SNP marker in Patagonian pejerrey (Odontesthes hatchert),a species with both genotypic and temperature-dependent sex determination2010

    • Author(s)
      R.S.Hattori, M.Oura, T.Sakamoto, M.Yokota, S.Watanabe, C.A.Strussmann
    • Journal Title

      AnimalGenetics

      Volume: 41 Pages: 81-84

    • Peer Reviewed
  • [Presentation] Expression of 11β-hsd2 during temperature-dependent masculinisation in pejerrey Odontesthes bonariensis2010

    • Author(s)
      J.1.Fernandino, R.S.Hattori, A.Kishii, H.Kamioka, C.A.Strussmann, G.M.Somoza
    • Organizer
      XII Jornadas Anuales de la Sociedad Argentina de Biologia
    • Place of Presentation
      Buenos Aires, Argentina
    • Year and Date
      2010-12-02
  • [Presentation] Characterization and expression profile of Revl gene during heat stress inmedaka (Oryzias latipes)2010

    • Author(s)
      A.M.H.B.Tareque, P.G.Yu, R.S.Hattori, M.Yokota, C.A.Strussmann
    • Organizer
      Fish and Climate Change 2010-Annual Meeting of the Fisheries Society of the British Isles
    • Place of Presentation
      Belfast, North Ireland
    • Year and Date
      2010-07-28
  • [Presentation] Some like it hot : temperature selection during the critical period of the rmolabile sex determination in pejerrey(Odontesthes bonariensis)2010

    • Author(s)
      J.Kaiga, C.A.Strussmann, R.S.Hattori, M.Oura, M.Yokota
    • Organizer
      Fish and Climate Change 2010-Annual Meeting of the Fishe ries Society of the British Isles
    • Place of Presentation
      Belfast, North Ireland
    • Year and Date
      2010-07-28
  • [Presentation] Use of otolith microchemistry in the field assessment of the effects of water temperature on fish sex determination2010

    • Author(s)
      C.A.Strussmann, T.Oikawa, T.Otake
    • Organizer
      Fish and Climate Change 2010-Annual Meeting of the Fisheries Society of the British Isles
    • Place of Presentation
      Belfast, North Ireland
    • Year and Date
      2010-07-28
  • [Presentation] Implications of climate change for the reproductive capacity and survival of Atherinopsid fish species2010

    • Author(s)
      C.A.Strussmann, D.O.Conover, G.M.Somoza, L.A.Miranda
    • Organizer
      Fish and Climate Change 2010-Annual Meeting of the Fisheries Society of the British Isles
    • Place of Presentation
      Belfast, North Ireland
    • Year and Date
      2010-07-27
  • [Presentation] Vulnerability of silverside (Odontesthes bonariensis) populations to climate change in pampean lakes of Argentina2010

    • Author(s)
      G.A.Kopprio, R.H.Freije, C.A.Strussmann, G.Kattner, M.S.Hoffineyer, C.A.Popovich, R.J.Lara
    • Organizer
      Fish and Climate Change 2010-Annual Meeting of the Fisheries Society of the British Isles
    • Place of Presentation
      Belfast, North Ireland
    • Year and Date
      2010-07-27

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Published: 2012-07-19  

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