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Related Concept Videos

Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...
Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Catenins01:23

Catenins

Catenins are characterized by multiple binding domains and dynamic structures that allow them to function as linker proteins in cell junction complexes. All catenins, except α-catenin, contain a characteristic protein sequence called the armadillo repeat and are therefore also called armadillo proteins.
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...

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Related Experiment Video

Updated: May 22, 2026

The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
07:34

The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions

Published on: February 16, 2017

GATA6 and FOXA2 regulate Wnt6 expression during extraembryonic endoderm formation.

Jason T K Hwang1, Gregory M Kelly

  • 1Molecular Genetics Unit, Department of Biology, Child Health Research Institute, Western University, London, Ontario, Canada.

Stem Cells and Development
|May 22, 2012
PubMed
Summary

Transcription factors GATA6 and FOXA2 directly regulate Wnt6 gene expression, activating the WNT-β-catenin pathway. This mechanism drives primitive endoderm differentiation in early embryogenesis.

More Related Videos

Studying Wnt Signaling During Patterning of Conducting Airways
13:00

Studying Wnt Signaling During Patterning of Conducting Airways

Published on: October 16, 2016

Related Experiment Videos

Last Updated: May 22, 2026

The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions
07:34

The Power of Simplicity: Sea Urchin Embryos as in Vivo Developmental Models for Studying Complex Cell-to-cell Signaling Network Interactions

Published on: February 16, 2017

Studying Wnt Signaling During Patterning of Conducting Airways
13:00

Studying Wnt Signaling During Patterning of Conducting Airways

Published on: October 16, 2016

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Cell Biology

Background:

  • Epithelial-to-mesenchymal transitions are crucial in embryogenesis, including primitive and parietal endoderm differentiation.
  • F9 teratocarcinoma cells model these transitions in vitro, responding to retinoic acid (RA) and dibutyryl cyclic adenosine monophosphate (db-cAMP).
  • Previous studies linked RA-induced Wnt6 upregulation to primitive endoderm development and canonical WNT-β-catenin pathway activation.

Purpose of the Study:

  • To elucidate the regulatory mechanism of Wnt6 gene expression during early endoderm differentiation.
  • To investigate the potential roles of GATA6 and FOXA2 transcription factors in Wnt6 regulation.

Main Methods:

  • In silico analysis of the human WNT6 promoter region.
  • Treatment of F9 teratocarcinoma cells with RA and db-cAMP.
  • Overexpression of Gata6 and Foxa2 in F9 cells.
  • Chromatin immunoprecipitation (ChIP) assays.
  • Wnt6 reporter gene assays.

Main Results:

  • Gata6 and Foxa2 mRNA levels were upregulated by RA and db-cAMP treatment in F9 cells.
  • Overexpression of Gata6 or Foxa2 induced primitive endoderm markers and upregulated Wnt6.
  • GATA6 and FOXA2 were found to bind directly to the Wnt6 promoter.
  • These transcription factors were sufficient to activate a Wnt6 reporter construct.

Conclusions:

  • GATA6 and FOXA2 directly regulate Wnt6 gene expression.
  • This regulation activates the canonical WNT-β-catenin pathway.
  • The GATA6/FOXA2-Wnt6 axis is a key mechanism for inducing primitive extraembryonic endoderm development.