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The roles of circadian clocks in the regulation of digestive system in fish

Research Project

Project/Area Number 09660215
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionTeikyo University of Science and Technology

Principal Investigator

TABATA Mitsuo  Teikyo University of Science and Technology, Professor, 理工学部, 教授 (70041853)

Co-Investigator(Kenkyū-buntansha) IIGO Masayuki  St.Marianna University school of Medicine, Assistant Professor, 医学部, 助手 (10232109)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥2,700,000 (Direct Cost: ¥2,700,000)
Keywordscircadian clock / digestive system / digestive enzyme / melatonin / melatonin receptor / cFos / immunohistochemistry / 消化機能 / 魚類消化管 / メラトニン合成酵素 / 日周性 / ニジマス / キンギョ
Research Abstract

1.Daily variations in enzyme activities involved in digestion
To investigate whether activities of digestive enzymes exhibit daily variations, digestive tracts of the rainbow trout were dissected under light-dark cycles and constant darkness. Determination of alpha amylase arid lipase activities is now in progress.
2.Roles of melatonin in digestive tracts
Melatonin is an internal Zeitgeber in vertebrates. To test whether melatonin is produced in the digestive tracts of fish, melatonin contents were determined. As a results, melatonin was detected in all regions of the digestive tracts of the rainbow trout. However, there was no daily variations. Molecular biological studies have demonstrated that there was no AANAT mRNA in fish digestive tract, indicating that melatonin is not produced in the digestive tract in situ.
3. Localization of feeding-entrainable circadian oscillator
cFos immunohistbchemistry was used to identify of feeding-entrainable circadian oscillator in fish brain. However, no positive signal was obtained.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Mizusaka K et al.: "Molecular cloning and characterization of a cDNA encoding the vetical amylalkylamine N-acetyltransferase of the rainbow front, Oucorhynchus mykiss" Zoological Science. 15. 345-351 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sauchez-VazquezFJ et al.: "Circadian rhythms of remand-feeding activity and locanotor activity patterns of single rainbow front, Oncorhychus mykiss" Journal of Fish Biology. 52. 255-267 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sauchez-Vazquez et al.: "Selection of macronutrients by goldfish operating self-feeders" Physiology and Behavior. 65. 211-218 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 田畑 満生: "魚類の自発摂餌と養魚への利用" アクアネット. 1. 46-49 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 飯郷 雅之: "メラトニン合成酵素「生物時計の分子生物学」" シュプリンガーフェアラーク東京、海老原史樹文、深田吉孝編, pp.83-95 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Mizusawa K,Iigo M,Suetake H,Yoshiura Y,Gen K,Kikuchi K,Okano T,Fukada Y,Aida K: "Molecularcloning and characterization of a cDNA encoding the retinal arylalkylamine N-acetyltransferase of the rainbow trout, Oncorhynchus mykiss." Zoological Science. 15. 345-351 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sanchez-Vazquez FJ,Tabata M: "Circadianrhythms of demand-feeding activity and locomotor activity patterns of single rainbow trout, Oncorhynchus mykiss." Journal of Fish Biology. 52. 255-267 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sanchez-Vazquez FJ,Yamamoto T,Akiyama T,Madrid JA,Tabata M: "Selection of macronutrients by goldfish operating Self-feeders." Physiology and Behavior. 65. 211-218 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Sanchez-Vazquez: "Selection of macronutrients by goldfish operafing self-feeders" Physiology and Behavior. 65(2). 211-218 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Sanchez-Vazquez: "Circadian rhythms of demand-feeding and locomotor activity in rainbow tronut" Journal of Fish Biology. 52. 255-267 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 飯郷雅之: "「生物時計の分子生物学」III,I.メラトニン合成酵素" シュプリンガー・フェアラーク東京(海老原史樹文、深田吉孝編), 83-95 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Iigo.M.et al.: "Ocular melatoninrhythms in the gold fish Carassius auratus." Journal of Biological Rhythms. 12. 182-192 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iigo.M.et al.: "Ocular melatoninrhythms in a cyprinid teleost oikawa Zacco platypus are driven by light-dark cycles." Zoological Science. 14. 237-242 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iigo.M.et al.: "Unusual responses to light and darkness of ocular melatonin in European sea bass." Neuroreport. 8. 1631-1635 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Sanchez-Vazguez.F.J.et al.: "Daily cycles in plasma and ocular melatonin in demand-fed sea bass ,Dicentrarchus labrax,L." Journal of Comparative Physiology B. 167. 409-415 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iigo.M.et al.: "Melatoniu binding sites in the goldfish retina." Zoological Science. 14. 601-607 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iigo.M.et al.: "Phtic and circadian regulation of melatonin thythms in fishes." Biological Signals. 6. 225-232 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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