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Development of the otic Placode and the statoacoustic ganglion in rat embryos

Research Project

Project/Area Number 04671060
Research Category

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

Allocation TypeSingle-year Grants
Research Field 耳鼻咽喉科学
Research InstitutionInstitute for Developmental Research, Aichi Human Service Center

Principal Investigator

MATSUDA Motoko  Department of Embryology, Institute for Developmental Research, Aichi Prefecture Colony, Senior Researcher, 発生学部, 主任研究員 (40165832)

Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
KeywordsRat / Embryo / Embryo Culture / Otic Development / Statoacoustic Ganglion / ラット胚 / 全胚培養 / 耳胞形成 / BrdU / 耳プラコード / 形態形成 / 陥入 / 細胞増殖 / 細胞移動 / マイクロフィラメント
Research Abstract

To investigate the mechanism of otic development increase of cell number and changes of the distributional pattern of microfilaments during otic development were examined in in vivo and cultured rat embryos (Sprague-Dawley strain). Embryos (9.5 days of gestation) were cultured for 48 hours in rat serum that contained cytochalasin D (2 X 10^<-8>M) or 5-bromo-2'-deoxyuridin (BrdU,1.6 X 10^<-4>M), in which malformed otocysts were observed. Otic development was also analyzed by using a collagen gel culture.
The otic placode develops into the otocyst within 24 hours from day 10.5 of gestation. The otic placode, the otic pit, and the otocyst were constituted by 700,2800, and 6000 cells respectively. The results of this experiments indicated that increse of cell number may not play roles but microfilaments may play roles on formation of the otocyst and migration of statoacoustic ganglion cells. Statoacoustic ganglia were formed from the cells which were emigrated from the neural crest and the lateral part of the neural tube in the rhombencephalon, the otic crest, and the dorso-lateral portion of the otic placode.
In the collagen gel culture, statoacoustic ganglia seemed to be formed in the same position at the otocyst as in control embryos, but neurites outgrew from the entire statoacoustic ganglion, although the axon of the statoacoustic ganglion was seen in the restricted route in control embryos.

Report

(4 results)
  • 1995 Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Matsuda Motoko: "Inhibition of cephalic neural tube closure by 5-azacytidine in neurulating rat embryos in vitro." Anat.Embryol.,. 185. 217-223 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda Motoko: "An open cephalic neural tube reproducibly induced by cytochalasin D in rat embryos in vitro." Zool.Sci.,. 11. 547-553 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda Motoko: "Axial rotation in rat embryos:Involvement of changes in the shapes and arrangement of cells." Cell Struc.and Funct.,. (in press). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kato-Semba Ritsuko: "Chondroitin sulfate proteoglycans in the rat brain:Candidates for axon barriers of sensory neurons and the possible modification by laminin of their actions." Eur.J.Neurosci.,. (in press). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda, M.and Yasutomi, M.: "Inhibition of cephalic neural tube closure by 5-azacytidine in neurulating rat embryos in vitro." Anat.Embryol.185. 217-223 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda, M.and Keino, H.: "An open cephalic neural tube reproducibly induced by cytochalasin D in rat embryos in vitro." Zool.Sci.11. 547-553 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda, M.and Yasutomi, M.: "Axial rotation in rat embryos : Involvement of changes in the shapes and arrangement of cells." Cell Struc.and Func.(in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Kato-Semba, R., Matsuda, M., Kato, K., et al.: "Chondroitin sulfate proteoglycans in the rat brain : Candidates for axon barriers of sensory neurons and the possible modification by laminim of their actions." Eur.J.Neurosci.(in press). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Matsuda Motoko: "An open cephalic neural tube reproducibly induced by cytochalasin D in rat embryos in vitro." Zool.Sci.11. 547-553 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Matsuda Motoko: "Axial rotaion in rat embryos:Involvement of changes in the shapes and arrangemento of cells." Cell Struc.and Funct.,. (in opess.). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kato-Semba Ritsuko: "Chondroitin sulfate proteoglycans in the rat brain:Candidates for axon barriers of sensory neurons and the possible modification by lamminin of their actions." Eur.J.Neurosci.,. (in press.). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Katoh-Semba,R.: "Core proteins of soluble chndroitin sulfate proteoglycans purifid from the rat brain block the cycle of PC12D cells" Journal of Cellular Physiology. 156. 17-23 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Katoh-Semba,R.: "An acceleration of age-related increases in levels of the b-subunit of nerve growth factor in selected tissues from senescence-accelerated mice(SAM-P18)" Journal of Molecular Neuroscience. 4. 107-115 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Ariga,T.: "Activation of UDP-galactose:globotriaosylcermide al-3-galactosyltransferase during PC12D cell differentiation induced by galactosylceramide" Biochemistry. 32. 7904-7908 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Katoh-Semba,R.: "Requlation by androgen of levels of the b-subunit of nerve growth factor and its mRNA in selected regions of the mouse brain" Journal of Neurochemistry. (1994)

    • Related Report
      1993 Annual Research Report

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

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