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Related Concept Videos

Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...
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...
Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal01:22

Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal

Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.

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Related Experiment Video

Updated: May 30, 2026

Studying Wnt Signaling During Patterning of Conducting Airways
13:00

Studying Wnt Signaling During Patterning of Conducting Airways

Published on: October 16, 2016

Wnt signaling specifies and patterns intestinal endoderm.

Richard I Sherwood1, Rene Maehr, Esteban O Mazzoni

  • 1Brigham and Women's Hospital and Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA. rsherwood@partners.org

Mechanisms of Development
|August 23, 2011
PubMed
Summary
This summary is machine-generated.

Wnt signaling drives intestinal development by activating the Cdx2 gene in embryonic endoderm. This pathway directs cells toward posterior intestinal fates, with dose-dependent effects on small versus large intestine development.

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

Related Experiment Videos

Last Updated: May 30, 2026

Studying Wnt Signaling During Patterning of Conducting Airways
13:00

Studying Wnt Signaling During Patterning of Conducting Airways

Published on: October 16, 2016

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

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Stem Cell Biology

Background:

  • Wnt signaling's role in early endoderm development is not fully understood.
  • Wnt signaling is active in posterior endoderm by embryonic day 7.5.

Purpose of the Study:

  • To investigate the role of Wnt signaling in early endoderm development.
  • To understand how Wnt signaling influences intestinal master regulator gene expression.
  • To identify genes specific to different intestinal regions during embryonic development.

Main Methods:

  • Utilized a mouse embryonic stem cell differentiation platform to generate pure definitive endoderm populations.
  • Employed genetic and chemical activation of the Wnt pathway.
  • Analyzed gene expression patterns to identify regional intestinal markers.

Main Results:

  • Wnt signaling directly induces the intestinal master regulator Cdx2 in endoderm.
  • Wnt activation shifts gene expression from an anterior to a posterior, intestinal program.
  • Identified genes specific to anterior small intestine, posterior small intestine, and large intestine.
  • Demonstrated that Wnt signaling, via Cdx2, activates large intestinal gene expression at high doses and small intestinal gene expression at lower doses.

Conclusions:

  • Wnt signaling is a key driver of embryonic intestinal induction.
  • Cdx2 is a critical mediator of Wnt's effects on intestinal development.
  • Findings provide insights into manipulating intestinal development from embryonic stem cells.