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Neurophysiological analysis on neuronal circuits related to thermoregulatory actions of central gonadotropin releasing hormone.

Research Project

Project/Area Number 10670062
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental physiology (including Physical medicine and Nutritional physiology)
Research InstitutionOsaka University

Principal Investigator

HOSONO Takayoshi  Medical School, Osaka University Assistant Professor, 医学系研究科, 助手 (60294104)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsThermoregulation / Neuronal circuit / Hypothalamus / Septal area / Central grey / Ventral tegmental area / GnRH / Thermoregulation / Neuronal circuit / Hypothalamus / Septal area / ゴナドトロピン放出ホルモン
Research Abstract

To clarify the neuronal circuits related central actions of gonadotropin releasing hormone (GnRH) on thermoregulation, neuronal circuits in the preoptic area (POA) in the hypothalamus, central grey (CG) and ventral tegmental area (VTA) in the midbrain, and septal area (SA) were investigated in detail using rats. 1.Stimulation and dislocation experiment : Electrical or chemical stimulations in the CG elicited skin vasodilations. On the other hand electrical or chemical stimulations in the VTA elicited skin vasoconstrictions. When the CG was cut by Haras-type knife, vasodilations which had been induced by the local thermal stimulation in the POA were disappeared. By the dislocation in the caudal VTA, peripheral skin vessels dilated spontaneously. 2.Electrophysiological experiment : The extracellular neuronal actions in the POA which retrogradely responded to electrical stimulations in the VTA were recorded. The warm-sensitive neurons in the POA, which responded to the local warming, tended to show responses with a slow conduction velocity. The warm-sensitive neurons which responded antegradely to the electrical stimulations in the SA showed four types of responses; 44% were facilitated, 13% inhibited, 18% inhibited after facilitation and 25% facilitated after inhibition by the electrical stimulation in the SA. These results indicated that there were two efferent neuronal circuits from POA related to thermoregulatory skin vasomotions; one is the inhibitory circuit to the VTA and the other is the facilitatory circuit to the CG. Majority of the POA neurons concerning thermoregulatory vasomotions were also shown to respond facilitatorily to the electrical stimulations in SA. The further investigations focused on POA-SA area using slice specimen may give more information to the central effects of GnRH on thermoregulation.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Chen X. M.: "New apparatus for studying bihavioral thermoregulation in rats"Physiology and Behavior. 64. 419-424 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Chen X. M.: "Efferent projections of preoptic area for the control of nonshivering thermogenesis in rats"Journal of Physiology. 512. 883-892 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kanosue K.: "Neuronal networks controlling thermoregulatoly effectors"Progress in Brain Research. 115. 49-62 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hosono T.: "Neuronal actions of oxytocin on the subfornical organ of male rats"American Journal of Physiology. 276. E1004-E1008 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kanosue K.: "Inhibitory control of shivering and nonshivering thermogenesis by preoptic warm-sensitive neurons"Journal of Thermal Biology. 24. 351-354 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoda T.: "Effects of food deprivation on daily changes in body temperature and behavioral thermoregulation in rats"American Journal of Physiology. 275. R134-R139 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Chen X. M.: "New apparatus for studying behavioral thermoregulation in rats."Physiology and Behavior. 64. 419-424 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Chen X. M.: "Efferent projections of preoptic area for the control of non -shivering thermogenesis in rats."Journal of Physiology. 512. 883-892 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kanosue K.: "Neuronal networks controlling thermoregulatory effectors."Progress in Brain Research. 115. 49-62 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hosono T.: "Neuronal actions of oxytocin on the subfornical organ of male rats."American Journal of Physiology. 276. E1004-E1008 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kanosue K.: "Inhibitory control of shivering and nonshivering thermogenesis by preoptic warm-sensitive neurons."Journal of Thermal Biology. 24. 351-354 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yoda T.: "Effects of food deprivation on daily changes in body temperature and behavioral thermoregulation in rats."American Journal of Physiology. 278. R134-R139 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Chen X.M.,Hosono T.et al.: "Efferent projections of preoptic area for the control of non-shivering thermogenesis in rats"Journal of Physiology. 512. 883-892 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kanosue K.,Hosono T.et al.: "Neuronal networks controlling thermoregulatory effectors"Progress in Brain Research. 115. 49-62 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hosono T.et al.: "Neuronal actions of oxytocin on the subfornical organ of male rats"American Journal of Physiology. 276. E1004-E1008 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kanosue K.,Hosono T.et al.: "Inhibitory control of shivering and nonshivering thermogenesis by preoptic warm-sensitive neurons"Journal of Thermal Biology. 24. 351-354 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 細野剛良、彼末一之、赤澤堅造: "恒温動物の体温調節性熱産生システムの工学的検討"電子情報通信学会技術研究報告. MBE98-80. 33-40 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 細野剛良、彼末一之、赤澤堅造: "恒温動物の体温調節系の工学的検討:熱放散系を中心に"電子情報通信学会技術研究報告. MBE98-75. 77-84 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Chen XM: "Effevent projections of preoptic area for the control of non-shiveving therinogenesis in vats." Jouvnal of Physiology. 512. 883-892 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Konosue K: "Neuronal networks controling thermo negulatary effeetais." Progress in Brain Research. 115. 49-62 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 細野剛良: "恒温動物の体温調節系の工学的検討:熱放散系を中心に" 信学放報. MBE,98-75. 77-84 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 細野剛良: "恒温動物の体温調節性熱産生システムの工学的検討" 信学放報. MBE,98-80. 33-40 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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