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Study on neurohormonal modulation of both somatic motor and circulatory systems in decapod Crustacea.

Research Project

Project/Area Number 60540453
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 動物発生・生理学
Research InstitutionInstitute of Biological Sciences University of Tsukuba

Principal Investigator

KURAMOTO Taketeru  University of TsukuBa,Institute of Biological Sciences. Assistant Professor, 生物科学系, 講師 (40015813)

Project Period (FY) 1985 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1987: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥900,000 (Direct Cost: ¥900,000)
KeywordsCrustaceans / Neurosecretion / Octopamine / Proctolin / Serotonin / Pericardial blood pressure / Feeding / 遊泳運動中枢 / 囲心腔器官 / 神経ホルモン,プロクトリン / 体性運動系 / 循環調節 / 心臓動脈弁 / 生物検定法
Research Abstract

The aim of this study was to clarify physiological functions of the pericardial organs developped in decapod Crustacea. To study these, te spiny lobster (Panulirus japonicus) and the american crayfish (Procambarus clarkii) were used. Behaviors of them were observed with video-recording systems. Blood pressure and electrical activities of nerve and muscle were recorded with conventional methods for electrophysiology. Main results are as follows.
1. Using a couple of electrodes and a pressure sensor implanted in the body, I succeeded in simultaneous recording of electrocardiogram and blood pressure in the pericardial cavity while various behaviors are recorded.
2. Using the cardioarterial valves, it was demonstrated that serum of the lobster contained three substances which show the same activities as pericardial hormones (octopamine, proctolin and serotonin), and that their concentrations were as high as 0.1 M (physiologically significant).
3. Cardiac pumping activities in vivo were slowly … More increased after an injection of octopamine or proctolin (lower than 1 M). Similar increases in cardiac pumping activities were observed during vigorous body movements, such as feeding and escape behaviors. This may imply that octopamine or proctolin secretes during vigorous body movements.
4. Each of serotonin, octopamine and proctolin showed specific modulatory actions on spontaneous activities of the ventral ganglia, especially on swimming activities of the crayfish. Serotonin enhanced impulse activity of power stroke motoneurons innervating swimmerets. Octopamine suppressed impulses of both power and return stroke motoneurons whereas proctolin activated them.
5. I succeeded in recording impulse activities of ligament nerves which are related to secretion of the pericardial neurohormones. Some (usuall three) axons in the ligament nerves started to fire when the pericardial cavity was perfused with cold saline (5-15゜C). Ligament nerves also fired when serotonin or octopamine (u mM, 1 ml) was applied into the pericardial cavity. Less

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] Kuramoto,T.: Zoological Science. 2. 863-863 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto,T.: 動物生理. 2. 172-172 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto,T.: Zoological Science. 3. 969-969 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto,T.: 動物生理. 3. 144-144 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto,T.: Zoological Science. 4. 987-987 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto,T.;Ebara,A.: Journal of Comparative Physiology B. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto, T.: "Haemodvnamics in the perfused heart of the lobster: effects of contraction of the cardioarterial valves." Zoological Science. 2. 863-863 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto, T.: "Pressure in the pericardium of the lobster." Zoological Science. 3. 969-969 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto, T.: "Change of cardiac pumping action in vivo in the lobster, Panulirus japonicus." Zoological Science. 4. 987-987 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto, T. and Ebara, A.: "Combined effects of 5-hydrooxytriptamine and filling pressure on the isolated heart of the lobster, Panulirus japonicus." Journal of Comparative Physiology B.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuramoto, T.: "Neurohormonal modulation of swimming activity in the isolatednerve cord of the crayfish, Procambarus clarkii." Journal of Neurobiology.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T.Kuramoto: Zoological Science. 3. 969 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] T.Kuramoto: 動物生理. 3. 144 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] T.Kuramoto: The Journal of Experimental Zoology. 241. (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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