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The role of Musashi1in the development and regeneration of vertebrate Inner ear

Research Project

Project/Area Number 15591814
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Otorhinolaryngology
Research InstitutionOsaka University

Principal Investigator

MURATA Junko  Osaka University, Graduate School of Medicine, Assistant Professor, 医学系研究科, 助手 (80332740)

Co-Investigator(Kenkyū-buntansha) OKANO Hideyuki  Keio University, Graduate School of Medicine, Professor, 医学部, 教授 (60160694)
KUBO Takeshi  Osaka University, Graduate School of Medicine, Professor, 医学系研究科, 教授 (30107031)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsMusashi1 / sensory epithelium of inner ear / regeneration / Notch signaling pathway / hair cell / supporting cell / Math1 / activated Notch1 / Hes1
Research Abstract

We have been investigated the expression pattern of Musashi1, one of typical neural stem cell markers in mouse inner ear. In the inner ear of young adult mice, Musashi1 immuno-positive cells were observed in vestibular and cochlear ganglion cells and supporting cells within the sensonsory epithelium. The results were published in Neuroscience letters 354 (2004), 201-204. Prof.Okano, one of our co-investigators, showed that Musashi1 activates Notch through blocking the function of Numb. Notch signaling pathway has been thought to play a crucial role in vertebrate inner ear development. Indeed, the expression pattern of Notch-related genes and the result of function-loss experiments using Jagged2-deficient mice, indicated that lateral induction, one of famous role of Notch signaling pathway, functions in the formation of a fine mosaic pattern of hair cells and supporting cells in the sensory epithelium. Thus to clarify the role of Musashi1 in the development and regeneration of inner ear, we thought that it is important to investigate the spatio-temporal expression pattern of Notch activation in vertebrate inner ear. We used a specific antibody that recognizes the processed form of the intracellular domain of Notch1 cleaved by presenilin/gamma-secretase activity. We indicated that Notch1 was transiently activated exclusively in supporting cell lineage and the activated form of Notch1 was not found at all in math1 positive hair cell precursors. These results were presented at 2005 ARO Midwinter Research Meeting (February 19-24, New Orleans, U.S.A.).

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (4 results)

All 2004 Other

All Journal Article (3 results) Publications (1 results)

  • [Journal Article] Expression of Musashi1, a neural RNA-binding protein, in the cochlea of young adult mice2004

    • Author(s)
      Murata, J., Murayama, A., Horii, A., Doi, K., Harada, T., Okano, H., Kubo, T.
    • Journal Title

      Neuroscience letters 354

      Pages: 201-204

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Expression of Musashi1, a neural RNA-binding protein, in the cochlea of young adult mice2004

    • Author(s)
      Murata, J., Murayama, A., Horii, A., Doi, K., Harada, T., Okano, H., Kubo T.
    • Journal Title

      Neuroscience letters 354

      Pages: 201-204

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Expression of Musashi1, a neural RNA-binding protein, in the cochlea of young adult mice2004

    • Author(s)
      Murata, J., Murayama, A., Horii A., Doi, K., Harada, T., Okano, H., Kubo, T.
    • Journal Title

      Neuroscience letters 354

      Pages: 201-204

    • Related Report
      2004 Annual Research Report
  • [Publications] Junko Murata: "Expression of Musashi1, a neural RNA binding protein, in cochlea the young adult mouse"Neuroscience Letters. 354. 201-204 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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