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Egg Cytoplasmic Factors that Regulate Developmental Pattern

Research Project

Project/Area Number 04044089
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionKyoto University

Principal Investigator

SATOH Noriyuki  Kyoto Univ., Faculty of Science, Assoc.Prof., 理学部, 助教授 (30025481)

Co-Investigator(Kenkyū-buntansha) JEFFERY William R.  Bodega Marine Laboratory, Univ. of California USA, Professor, ボデガ海洋研究所, 教授
ウィリアム R ジェフェ  米国カリフォルニア大学, ボデガ海洋研究所, 教授
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1993: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1992: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsDevelopmental pattern / Egg cytoplasmic factors / gene expression / Notochord / Muscle / Pigment cells / Prochordates / Evolution
Research Abstract

A recent molecular-phylogenetic study based on the comparison of 18S rDNA sequences has suggested that formation of tadpole larvae is a key developmental event to understand the origin and evolution of chordates. During embryogenesis of ascidians, about forty unicellular and striated muscle cells as well as forty notochord cells are formed in the tail of the larva. Therefore, it is important to study molecular mechanisms involved in differentiation of these cells to understand not only ontogeny by also phylogeny of animals.
We have isolated an ascidian homolog of the mouse T (Brachyury) gene. The ascidian T gene is expressed exclusively in notochord cells and the expression begins with the time of restriction of their developmental fates. Therefore, the T gene is cue to understand the chordate evolution. We are now studying the T gene expression in ascidians which develop tailless larvae.
Muscle cell differentiation in ascidian embryos has been studied at the levels of muscle actin genes, myogenic regulatory gene, and cytoplasmic factors (or muscle determinants). We have also studied muscle actin genes in ascidians with tailless larvae, and it was found that the ascidian with tailless larvae contains several pseudogenes of muscle actin, which were not found in ascidians with tailed larvae under usual research conditions we adopted.

Report

(2 results)
  • 1993 Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Kusakabe,T.,Makabe,K.W. & Satoh,N.: "Tunicate muscle actin genes." J.Molecular Biology. 227. 955-960 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yasuo,H. & Satoh,N.: "Function of vertebrate T gene" Nature. 364. 582-583 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Swalla,B.J.,et al.: "Novel genes expressed differentially in ascidians with alternate modes of development." Development. 119. 307-318 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hikosaka,A.,Satoh,N. & Makabe,K.W.: "Regulated spatial expression of fusion gene contstructs with the 5'upstream region of muscle actin gene." Roux's Arch Develop.Biol.203. 104-112 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Marikawa,Y.,Yoshida,S. & Satoh,N.: "Development of egg fragments of the ascidian Ciona savignyi." Develop.Biol.162(in press). (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Wada,Y. & Satoh,N.: "Details of the evolutionary history from invertebrates to vertebrates." Proc.Natl.Acad.Sci.,USA. 91(in press). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Satoh,N.: "Developmental Biology of Ascidians" Cambridge University Press, 234 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Kusakabe,T., Makabe,K.W. & Satoh,N.: "Tunicate muscle actin genes : Structure and organization as a gene cluster." J. Molecular Biology. 227. 955-960 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Yasuo,Y. & Satoh,N.: "Function of vertebrate T gene." Natrue. 364. 582-583 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Swalla,B.J., Makabe,K.W., Satoh,N. & Jeffery,W.R.: "Novel gene expressed differentially in ascidians with alternate modes of development." Development. 119. 307-318 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hikosaka,A., Satoh,N. & Makabe,K.W.: "Regulated spatial expression of fusion gene constructs with 5' upstream region of muscle actin gene." Roux's Arch. Develop. Biol.203. 104-112 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Marikawa,Y., Yoshida,H. & Satoh,N.: "Development of egg fragments of the ascidian Ciona savignyi." Developmental Biology. 162 (in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Wada,H. & Satoh,N.: "Details of evolutionary histroy from invertebrates to vertebrates, as deduced from the sequences of 18S rDNA." Proc.Natl.Acad.Sci.USA. 91 (in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Satoh,N.: Cambridge University Press. Developmental Biology of Ascidians, 234 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Takehiro KUSAKABE: "Tunicate muscle actin genes: Structure and organization as a gene cluster" J. Molecular Biology. 227. 956-960 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Akira HIKOSAKA: "Introduction and expression of recombinant genes in ascidin embryos" Develop. Growth Differ.34. 627-634 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Akira HIKOSAKA: "Regulated spatial expression of fusion gene constructs with the 5'-upstream region of Halocynthia muscle actin gene in Ciona embryos" Roux's Arch. Develop. Biol.(1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Akira HIKOSAKA: "The 5'-upstream region with a TATA box and an E box consensus sequence is sufficient for spatial expression of muscle actin gene." Develop.Biol.(1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Noriyuki SATOH: "Developmental Biology of Ascidians" Cambridge University Press, New York. CA-250 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Hitoyoshi YASUO: "An ascidian homologue of mouse Brachyury (T) gene is expressed only in notochord cells at the time of restriction of developmental fate" Development. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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