2006 Fiscal Year Final Research Report Summary
Studies on endoderm and emdodermal organ formation by analyzing zebrafish mutants.
| Project/Area Number |
15370094
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Developmental biology
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| Research Institution | Nagoya University |
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Principal Investigator |
KIKUCHI Yutaka Nagoya University, Graduate School of Science, Associate Professor, 大学院理学研究科, 助教授 (20286438)
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| Project Period (FY) |
2003 – 2006
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| Keywords | zebrafish / endoderm / mutant / organogenesis |
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| Research Abstract |
Gastrulating vertebrate embryos generate the three germ layers, known as ectoderm, mesoderm and endoderm during early development. The induction and differentiation of endodermal cells and the formation of organs derived from the gut tube have been poorly analyzed in comparison to ectoderm or mesoderm. However, in the past few years, zebrafish mutants and knockout mice which have disrupted endoderm formation, and the molecular functions of Xenopus genes involved in endoderm formation, have been extensively analyzed. As a result of these studies, our understanding of endoderm development is now fairly advanced in early vertebrate embryos. In particular, these genetic and molecular biological approaches have led to a more detailed understanding of the molecular regulation of the endoderm.
In spite of these efforts, however, many mechanisms, such as the fate choice of endodermal cells, the migration of endodermal cells during gastrulation and the regional specification of the endoderm along the anterior-posterior axis, which are essential to fully understand its differentiation, are not well understood. To elucidate the molecular mechanisms of endoderm and endodermal organ formation, I planned to search the new zebrafish mutants, which show the defects in endoderm formation. We have already screened 130 fish pairs (260 genomes) and succeeded to find the three new mutants. The two mutants (legato and morendo) show defects in the intestinal epithelium formation. The other mutant (decrescendo) shows the defects in endodermal organ formation. We are analyzing the phenotype of these mutants and trying to find the mutated genes.
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[Journal Article] Initial specification of the epibranchial placode in zebrafish embryos depends on the fibroblast growth factor signal.2007
Author(s)
Nikaido, M., Doi, K., Shimizu, T., Hibi, M., Kikuchi.Y., Yamasu, K.
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Journal Title
Developmental Dynamics 236
Pages: 564-571
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Eomesodermin is a localized maternal determinant required for endoderm induction in zebrafish.2005
Author(s)
Bjornson, C.R.R., Griffin, K.J.P., Farr III, G.H., Terashima, A., Himeda, C., Kikuchi.Y., Kimelman, D.
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Journal Title
Developmental Cell 9
Pages: 523-533
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Notch signaling can regulate endoderm formation in zebrafish.2004
Author(s)
Kikuchi.Y., Verkade, H., Reiter, J.F., Kim, C.-H., Chitnis, A.B., Kuroiwa, A., Stainier, D.Y.R.
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Journal Title
Developmental Dynamics 229
Pages: 756-762
Description
「研究成果報告書概要(欧文)」より
