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CHOLINERGIC FUNCTIONS FOR BRAIN PLASTICITY DURING BIRD SONG LEARNING

Research Project

Project/Area Number 05680703
Research Category

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

Allocation TypeSingle-year Grants
Research Field Neuroscience in general
Research InstitutionDokkyo University, School of Medicine

Principal Investigator

SAKAGUCHI Hironobu  (Dokkyo Univerity, School of Medicine), The Medical Department, Lecturer, 医学部, 講師 (30162291)

Co-Investigator(Kenkyū-buntansha) SAITO Nozomu  (Dokkyo Univerity, School of Medicine), The Medical Department, Professor, 医学部, 教授 (30049126)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
KeywordsZebra finch / Sensitive period / Song learning / Brain plasticity / Acetylcholine / PI turnover / Protein kinase C / GAP-43 / イノシトール大謝
Research Abstract

A young male zebra finch learns its song during a sensitive period. The sensory motor phase of song learning is closely correlated to development of a song control nucleus, RA,which receives inputs from two other song control nuclei. We previously found that acetylcholine (ACh) content and the enzyme activity of choline acetyltransferase (ChAT) increase transiently in the RA during a sensitive period of song learning, when RA synapses for two inputs are highly plastic. For this purpose, we have investigated whether muscarinic agonist carbachol would affect phosphoinositide (PI) metabolism in the RA.
The male zebra finch at 30 days, 50 days after hatching and adults were used. Carbachol-stimulated PI turnover was examined by measuring the accumulation of [3H]-inositol phosphates from [3H]-inositol labeled synaptoneurosomes of RA,in the presence of lithium. Carbachol increased PI turnover significantly. Carbachol-stimulated PI turnover reached a maximum at 50 days after hatching, and decreased to adult level. These results suggest that ACh affects synaptic plasticity of zebra finch RA during song learning, because PI turnover activate protein kinase C responsible for the phosphorylation of some phosphoproteins, which play a important role in synaptic plasticity.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] H.Sakaguchi: "GAP-43 immunostaining in the song control nuclei of zebra finch during sensitive period of song learning." Neurosci.Res.S18. 116- (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Sakaguchi: "Expression of GAP-43mRNA in the song control nuclei during sensitive period of song learning." Neurosci.Res.S19. 166- (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 坂口博信: "鳥の歌学習の脳内神経機構" 比較生理生化学. 12. 12-22 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Sakaguchi: "GAP-43 immunostaining in the song control nuclei of zebra finch during sensitive period of song learning." Neurosci.Res.S18. 116 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Sakaguchi: "Expression of GAP-43 mRNA in the song control nuclei during sensitive period of song learning." Neurosci.Res.S19. 116 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Sakaguchi: "Molecular mechanisms of plasticity in avian song learning. (In Japanese)" Com.Physiol.Biochem.12. 12-22 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Sakaguchi: "Expression of GAP-43mRNA in the song control nuclei during sensitive period of song learning" Neurosci.Res.S19. S166- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 坂口博信: "鳥の歌学習の脳内神経機構" 比較生理生化学. 1(発表予定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Sakaguchi 〓 N.Saito: "GAP-43 IMMUNISTAINING IN THE SONG CONTROL NUCLEI OF ZEBRA FINCH DURING SENSITIVE PERIDO OF SONG LEARNING." Neuroscience Research. S18. 116 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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