Unity and diversity of gill ionocyte morphology in teleost fishes

• Project/Area Number: 22780183
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: General fisheries
• Research Institution: St. Marianna University School of Medicine
• Principal Investigator: HIROI Junya 聖マリアンナ医科大学, 医学部, 准教授 (20350598)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• 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 / イオン輸送体

Research Abstract

Teleost fishes are able to live in both fresh water and seawater by means of specialized "ionocytes" in the gill epithelium. Simultaneous immunofluorescence staining of multiple ion-transport proteins revealed morphological variations in ionocytes among teleost species (e.g. rainbow trout, tilapia and zebrafish). Ionocytes possessing apical Na+/H+ exchanger, apical Rh protein, basolateral Na+/K+-ATPase and basolateral Na+/K+/2Cl- cotransporter are common in fishes.

Research Products

• [Journal Article] New insights into gill ionocyte and ion transporter function in euryhaline and diadromous fish. (2012)
  • Author(s): Hiroi J and McCormick SD
  • Journal Title: Respiratory Physiology & Neurobiology Volume: Vol.184 Issue: 3 Pages: 257-268
  • DOI: 10.1016/j.resp.2012.07.019
  • Peer Reviewed
• [Journal Article] Remarkable consistency of exon-intron structure of hatching enzyme genes and molecular phylogenetic relationships of teleostean fishes (2012)
  • Author(s): Mari Kawaguchi, Sebastien Lavoue, Junya Hiroi, Hirofumi Hayano, Ichiro Iuchi, Shigeki Yasumasu, Mutsumi Nishida
  • Journal Title: Environmental Biology of Fishes Volume: (in press) Issue: 3 Pages: 567-576
  • DOI: 10.1007/s10641-011-9920-1
  • Peer Reviewed
• [Journal Article] Branchialionocyteorganizationandion-transportproteinexpressioninjuvenilealewivesacclimatedtofreshwaterorseawater. (2011)
  • Author(s): Christensen AK, Hiroi J, Schultz ET and McCormick SD
  • Journal Title: JournalofExperimentalBiology Volume: Vol.215 Issue: 4 Pages: 642-652
  • DOI: 10.1242/jeb.063057
  • Peer Reviewed
• [Journal Article] Intron-lossevolutionofhatchingenzymegenesinTeleostei. (2010)
  • Author(s): KawaguchiM,HiroiJ,MiyaM,NishidaM,IuchiIandYasumasuS.
  • Journal Title: BMCEvolutionaryBiology Volume: Vol.10 Issue: 1
  • DOI: 10.1186/1471-2148-10-260
  • Peer Reviewed
• [Journal Article] Intron-loss evolution of hatching enzyme genes in Teleostei (2010)
  • Author(s): Kawaguchi, M., et al.
  • Journal Title: BMC Evolutionary Biology Volume: 10 Pages: 260-260
  • Peer Reviewed
• [Presentation] Howmanytypesofionocytesarethereinrainbowtroutgills- (2012)
  • Author(s): HiroiJ.
  • Organizer: 10thInternationalCongressontheBiologyofFish
  • Place of Presentation: Madison,WI,USA.
  • Year and Date: 2012-07-16
• [Presentation] Osmoregulation&theDevelopmentalProgram. (2011)
  • Author(s): HiroiJ.
  • Organizer: 8thInternationalCongressofComparativePhysiologyandBiochemistry
  • Place of Presentation: 名古屋.
  • Year and Date: 2011-06-01
• [Presentation] Osmoregulation & the Developmental Program (2011)
  • Author(s): Hiroi, J.
  • Organizer: 第8回国際比較生理生化学会会議
  • Place of Presentation: 名古屋(名古屋国際会議場)
  • Year and Date: 2011-06-01
• [Presentation] ティラピアの塩類細胞は4種類だがニジマスの塩類細胞は何種類か (2010)
  • Author(s): 廣井準也,水野伸也,安増茂樹,金子豊二
  • Organizer: 平成22年度日本水産学会秋季大会
  • Place of Presentation: 京都
  • Year and Date: 2010-09-24
• [Presentation] ティラピアの塩類細胞は4種類だがニジマスの塩類細胞は何種類か? (2010)
  • Author(s): 廣井準也
  • Organizer: 平成22年度日本水産学会秋季大会
  • Place of Presentation: 京都(京都大学)
  • Year and Date: 2010-09-24
• [Presentation] How many types of ionocytes are there in rainbow trout gills?
  • Author(s): Hiroi, J.
  • Organizer: 10th International Congress on the Biology of Fish
  • Place of Presentation: Madison, WI, USA