• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2006 Fiscal Year Final Research Report Summary

Relation between change in animal behavior and change in transcription factor in a single neuron

Research Project

Project/Area Number 16370033
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Animal physiology/Animal behavior
Research InstitutionTokushima Bunri University (2006)
Hokkaido University (2004-2005)

Principal Investigator

ITO Etsuro  Tokushima Bunri University, Kagawa School of Pharmaceutical Sciences, Professor, 香川薬学部, 教授 (80203131)

Co-Investigator(Kenkyū-buntansha) MATSUO Ryota  Tokushima Bunri University, Kagawa School of Pharmaceutical Sciences, Lecturer, 香川薬学部, 講師 (40334338)
KOBAYASHI Suguru  Tokushima Bunri University, Kagawa School of Pharmaceutical Sciences, Research Associate, 香川薬学部, 助手 (50325867)
SADAMOTO Hisayo  Tokushima Bunri University, Kagawa School of Pharmaceutical, Sciences Associate, 香川薬学部, 助手 (70374220)
MITA Koichi  Tokushima Bunri University, Kagawa School of Pharmaceutical Sciences, Associate Professor, 香川薬学部, 助教授 (50281845)
SAITO Tamao  Hokkaido University, Graduate School of Science, Research Associate, 大学院理学研究院, 助手 (30281843)
Project Period (FY) 2004 – 2006
Keywordssingle cell / learning / memory / CREB / real-time PCR / RNAi
Research Abstract

Gene expression is differently regulated in every cell even though the cells are included in the same tissue. For this reason, we need to measure the amount of mRNAs in a single cell to understand transcription mechanism better. We therefore developed a procedure for determining the exact copy numbers of mRNAs within a single cell. We first isolated the cerebral giant cell of Lymnaea stagnalis as this neuron plays a key role in the process of memory consolidation of a learned behavior of feeding. We then determined the copy numbers of mRNAs for the cyclic AMP-responsive element binding proteins (CREBs) by quantitative real-time PCR. Next, we still do not know whether the constitutively expressed forms of CREB are enough or the newly synthesized forms are required for the synaptic enhancement. In addition, if the newly synthesized forms are needed, we must determine the time for translation of CREB from its mRNA. We applied the methods of RNA interference and real-time PCR to CREB in the cerebral giant cells. The cerebral giant cells employ a CREB cascade for the synaptic enhancement to neurons such as the B1 motoneurons. We injected the siRNA of the activator type of CREB (CREB1) or the repressor type (CREB2) into the cerebral giant cells and examined the changes in amplitude of EPSP recorded in the B1 motoneurons. The changes in the amounts of CREB1 and CREB2 mRNAs were also examined in the cerebral giant cells. The EPSP amplitude was suppressed 15 min after injection of CREB1 siRNA, whereas that was augmented 60 min after injection of CREB2 siRNA. In the latter case, the decrease in the amount of CREB2 mRNA was confirmed by real-time PCR. Our results showed that the de novo synthesized forms of CREB are required within tens of minutes for the synaptic enhancement in memory consolidation.

  • Research Products

    (12 results)

All 2007 2006 2005

All Journal Article (12 results)

  • [Journal Article] One-trial conditioned taste aversion in Lymnaea : good and poor performers in long-term memory acquisition2007

    • Author(s)
      R.Sugai et al.
    • Journal Title

      J. Exp. Biol. 210

      Pages: 1225-1237

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] One-trial conditioned taste aversion in Lymnaea : good and poor performers in long-term memory acquisition2007

    • Author(s)
      R.Sugai, S.Azamia, H.Shiga, T.Watanabe, H.Sadamoto, S.Kobayashi, D.Hatakeyama, Y.Fujito, K.Lukowiak, E.Ito
    • Journal Title

      J.Exp.Biol. 210

      Pages: 1225-1237

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Taste discrimination in conditioned taste aversion of the pond snail Lymnaea stagnalis2006

    • Author(s)
      R.Sugai et al.
    • Journal Title

      J. Exp. Biol. 209

      Pages: 826-833

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] De novo synthesis of CREB in a presynaptic neuron is required for synaptic enhancement involved in memory consolidation2006

    • Author(s)
      A.Wagatsuma et al.
    • Journal Title

      J. Neurosci. Res. 84

      Pages: 954-960

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Altered gene activity correlated with long-term memory formation of conditioned taste aversion in Lymnaea2006

    • Author(s)
      S.Azami et al.
    • Journal Title

      J. Neurosci. Res. 84

      Pages: 1610-1620

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Requirement of new protein synthesis of a transcription factor for memory consolidation : Paradoxical changes in mRNA and protein levels of C/EBP2006

    • Author(s)
      D.Hatakeyama, H.Sadamoto, T.Watanabe, A.Wagatsuma, S.Kobayashi, Y.Fujito, M.Yamashita, M.Sakakibara, G.Kemenes, E.Ito
    • Journal Title

      J.Mol.Biol. 356

      Pages: 569-577

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Taste discrimination in conditioned taste aversion of the pond snail Lymnaea stagnalis2006

    • Author(s)
      R.Sugai, H.Shiga, S.Azami, T.Watanabe, H.Sadamoto, Y.Fujito, K.Lukowiak, E.Ito
    • Journal Title

      J.Exp.Biol. 209

      Pages: 826-833

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] De novo synthesis of CREB in a presynaptic neuron is required for synaptic enhancement involved in memory consolidation2006

    • Author(s)
      A.Wagatsuma, S.Azami, M.Sakura, D.Hatakeyama, H.Aonuma, E.Ito
    • Journal Title

      J.Neurosci.Res. 84

      Pages: 954-960

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Altered gene activity correlated with long-term memory formation of conditioned taste aversion in Lymnaea2006

    • Author(s)
      S.Azami, A.Wagatsuma, H.Sadamoto, D.Hatakeyama, T.Usami, M.Fujie, R.Koyanagi, K.Azumi, Y.Fujito, K.Lukowiak, E.Ito
    • Journal Title

      J.Neurosci.Res. 84

      Pages: 1610-1620

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Determination of the exact copy numbers of particular mRNAs in a single cell by quantitative real-time RT-PCR2005

    • Author(s)
      A.Wagatsuma et al.
    • Journal Title

      J. Exp. Biol. 208

      Pages: 2389-2398

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Requirement of new protein synthesis of a transcription factor for memory consolidation : paradoxical changes in mRNA and protein levels of C/EBP2005

    • Author(s)
      D.Hatakeyama et al.
    • Journal Title

      J. Mol. Biol. 356

      Pages: 569-577

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Determination of the exact copy numbers of particular mRNAs in a single cell by quantitative real-time RT-PCR2005

    • Author(s)
      A.Wagatsuma, H.Sadamoto, T.Kitahashi, K.Lukowiak, A.Urano, E.Ito
    • Journal Title

      J.Exp.Biol. 208

      Pages: 2389-2398

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2008-05-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi