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2009 Fiscal Year Final Research Report

Identification of fresh and seawater specific molecular markers in teleosts

Research Project

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Project/Area Number 20780147
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field General fisheries
Research InstitutionSt.Marianna University School of Medicine

Principal Investigator

HIROI Junya  St.Marianna University School of Medicine, 医学部, 准教授 (20350598)

Project Period (FY) 2008 – 2009
Keywords魚類 / 環境適応 / 浸透圧調節 / 淡水 / 海水 / 塩類細胞 / イオントランスポーター
Research Abstract

Euryhaline fish can live in both fresh water and seawater by means of specialized "mitochondrion-rich cells (MRCs)". Although MRCs are considered to be involved in both ion uptake in fresh water and ion secretion in seawater, the ion-uptake mechanism has been controversial for over 30 years. In this study, we identified a novel freshwater-type ion transporter in tilapia MRCs and proposed a new ion uptake model. We also found that ion uptake mechanisms vary among fish species. These findings are opening a new window for the study on fish osmo- and iono-regulation.

  • Research Products

    (10 results)

All 2009 2008

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (2 results) Book (2 results)

  • [Journal Article] Morphological and functional classification of ion-absorbing mitochondriarich cells in the gills of Mozambique tilapia2009

    • Author(s)
      Inokuchi M, Hiroi J, Watanabe S, Hwang PP, Kaneko T
    • Journal Title

      Journal of Experimental Biolog 212

      Pages: 1003-1010

    • Peer Reviewed
  • [Journal Article] Role of SLC12A10. 2, a Na-Cl cotransporter-like protein, in a Cl uptake mechanism in zebrafish (Danio rerio)2009

    • Author(s)
      Wang YF, Tseng YC, Yan JJ, Hiroi J, Hwang PP
    • Journal Title

      American Journal of Physiology - Regulatory, Integrative and Comparative Physiology 296

      Pages: R1650-1660

    • Peer Reviewed
  • [Journal Article] Different hatching strategies in embryos of two species, pacific herring Clupea pallasii and Japanese anchovy Engraulis japonicus, that belong to the same order Clupeiformes, and their environmental adaptation2009

    • Author(s)
      Kawaguchi M, Fujita H, Yoshizaki N, Hiroi J, Okouchi H, Nagakura Y, Noda T, Watanabe S, Katayama S, Iwamuro S, Nishida M, Iuchi I, Yasumasu S
    • Journal Title

      Journal of Experimental Zoology Part B: Molecular and Developmental Evolution 312

      Pages: 95-107

    • Peer Reviewed
  • [Journal Article] Gene expression and morphological localization of NHE3, NCC and NKCC1a in branchial mitochondria-rich cells of Mozambique tilapia (Oreochromis mossambicus) acclimated to a wide range of salinity2008

    • Author(s)
      Inokuchi M, Hiroi J, Watanabe S, Lee KM, Kaneko T
    • Journal Title

      Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology 151

      Pages: 151-158

    • Peer Reviewed
  • [Journal Article] Evidence for an apical Na-Cl cotransporter involved in ion uptake in a teleost fish2008

    • Author(s)
      Hiroi J, Yasumasu S, McCormick SD, Hwang PP, Kaneko T
    • Journal Title

      Journal of Experimental Biology 211

      Pages: 2584-2599

    • Peer Reviewed
  • [Journal Article] Hatching enzyme of the ovoviviparous black rockfish Sebastes schlegelii-environmental adaptation of the hatching enzyme and evolutionary aspects of formation of the pseudogene2008

    • Author(s)
      Kawaguchi M, Nakagawa M, Noda T, Yoshizaki N, Hiroi J, Nishida M, Iuchi I, Yasumasu S
    • Journal Title

      FEBS Journal 275

      Pages: 2884-2898

    • Peer Reviewed
  • [Presentation] Evidence for an apical Na-Cl cotransporter involved in ion uptake in tilapia embryos2008

    • Author(s)
      Hiroi J
    • Organizer
      8th International Congress on the Biology of Fish
    • Place of Presentation
      Portland, OR, USA
    • Year and Date
      2008-07-30
  • [Presentation] 魚類の「塩類細胞」に局在するcation-chloride cotransporter2008

    • Author(s)
      廣井準也
    • Organizer
      第3回トランスポーター研究会年会
    • Place of Presentation
      京都
    • Year and Date
      2008-06-08
  • [Book] 稚魚学-多様な生理生態を探る2008

    • Author(s)
      廣井準也
    • Total Pages
      42-47
    • Publisher
      生物研究社
  • [Book] Fish Larval Physiology(eds. R.N.Finn and B.G.Kapoor)2008

    • Author(s)
      Kaneko T, Hiroi J
    • Total Pages
      163-183
    • Publisher
      Science Publishers, Enfield

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Published: 2011-06-18   Modified: 2016-04-21  

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