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High Resolution Whole Mount In Situ Hybridization within Zebrafish Embryos to Study Gene Expression and Function
10:06

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Published on: October 19, 2013

Hgf/c-met expression and functional analysis during zebrafish embryogenesis.

Andrew J Latimer1, Jason R Jessen

  • 1Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA.

Developmental Dynamics : an Official Publication of the American Association of Anatomists
|November 28, 2008
PubMed
Summary
This summary is machine-generated.

This study reveals the role of Hepatocyte Growth Factor (HGF) and its receptor Met in zebrafish development. Met signaling is crucial for endoderm specification and liver development, conserved across vertebrates.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Hepatocyte growth factor (HGF) and its receptor tyrosine kinase Met are implicated in vertebrate development and cancer.
  • Understanding Met signaling in non-mammalian vertebrates provides insights into conserved biological processes.

Purpose of the Study:

  • To characterize the expression patterns of zebrafish c-met, hgf1, and hgf2 during development.
  • To investigate the role of Met signaling in endoderm specification and liver development in zebrafish.

Main Methods:

  • Expression analysis of c-met, hgf1, and hgf2 from cleavage to organogenesis stages.
  • Nodal signaling pathway analysis and downstream gene expression studies.
  • Zebrafish Met knockdown to assess effects on liver development.

Main Results:

  • Zebrafish c-met is identified as an endoderm marker, with expression activated downstream of Nodal.
  • hgf1 and hgf2 show specific expression patterns in mesendodermal cells, pharyngeal arches, and swim bladder.
  • Met knockdown in zebrafish leads to reduced liver size, mirroring findings in mice.

Conclusions:

  • Met signaling plays a significant role in endoderm specification in zebrafish.
  • Mechanisms governing liver development are conserved between mammals and bony fish, highlighting the importance of Met signaling.