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2013 Fiscal Year Final Research Report

Molecular basis for the secondary neural circuit formation in the mouse olfactory system

Research Project

  • PDF
Project/Area Number 23300140
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Neurophysiology and muscle physiology
Research InstitutionThe University of Tokyo

Principal Investigator

NISHZIUMI Hirofumi  東京大学, 理学(系)研究科(研究院), 助教 (30292832)

Project Period (FY) 2011-11-18 – 2014-03-31
Keywords嗅覚 / 遺伝子改変マウス / 神経回路形成 / シナプス結合 / 再生
Research Abstract

In the mouse olfactory system, map topography is largely established by axon-axon interactions of olfactory sensory neurons (OSNs). However, to make the map functional, the OSNs must make proper connections to the mitral/tufted (M/T) cells. Then, how do the M/T cell dendrites find their partner glomeruli for synapse formation with OSN axons? Does the odorant receptor (OR) specificity of glomeruli play an instructive role in matching M/T cell dendrites with OSN axons? To address these questions, we analyzed dendrite selection and synapse formation of mitral cells in various mutant mice in which glomerular formation was perturbed. We also studied synapse reconstitution in adult glomeruli. Our present results support the "proximity model", whereby mitral cells tend to connect primary dendrites to the nearest neighboring glomeruli regardless of OR specificity. The map location or address code of glomeruli plays a key role in matching mitral cells with their partner glomeruli.

  • Research Products

    (8 results)

All 2013 2012 2011 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] Agonist-independent GPCR activity regulates anterior-posterior targeting of olfactory sensory neurons2013

    • Author(s)
      Nakashima A., Takeuchi H., Imai T., Saito H., Kiyonari H., Abe T., Chen A., Weinstein L.S., Yu C.R., Storm D.R., Nishizumi H., and Sakano H
    • Journal Title

      Cell

      Volume: 154 Pages: 1314-1325

    • DOI

      10.1016/j.cell.2013.08.033

    • Peer Reviewed
  • [Journal Article] Possible roles of Robo1^<+> ensheathing cells in guiding dorsal-zone olfactory sensory neurons in mouse2013

    • Author(s)
      Aoki M., Takeuchi H., Nakashima A., Nishizumi H., and Sakano H
    • Journal Title

      Dev. Neurobiol

      Volume: 73 Pages: 828-840

    • DOI

      10.1002/dneu.22103

    • Peer Reviewed
  • [Presentation] Formation and maintenance of the mouse olfactory map2013

    • Author(s)
      西住裕文
    • Organizer
      第36回日本分子生物学会年会
    • Place of Presentation
      神戸
    • Year and Date
      20131203-06
  • [Presentation] Genetic manipulation of aversive olfactory circuits in mouse2013

    • Author(s)
      西住裕文
    • Organizer
      JST Mini-Meeting
    • Place of Presentation
      東京
    • Year and Date
      2013-02-10
  • [Presentation] マウス嗅覚神経回路の形成と再生の分子機構2012

    • Author(s)
      西住裕文
    • Organizer
      日本応用酵素協会 第38回研究発表会
    • Place of Presentation
      大阪
    • Year and Date
      2012-11-19
  • [Presentation] Formation and maintenance of the mouse olfactory map2011

    • Author(s)
      西住裕文
    • Organizer
      第34回日本分子生物学会年会
    • Place of Presentation
      横浜
    • Year and Date
      20111213-16
  • [Presentation] Formation and maintenance of the mouse olfactory map2011

    • Author(s)
      西住裕文
    • Organizer
      International Conference on Frontiers in Neuroscience : From Brain to Mind
    • Place of Presentation
      京都
    • Year and Date
      20111206-09
  • [Remarks]

    • URL

      http://www.s.u-tokyo.ac.jp/ja/press/2013/42.html

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Published: 2015-06-25  

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