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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...
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...
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...
Stem Cell Niche01:26

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...

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Related Experiment Video

Updated: Jul 6, 2026

Isolation of Stem-like Cells from 3-Dimensional Spheroid Cultures
09:06

Isolation of Stem-like Cells from 3-Dimensional Spheroid Cultures

Published on: December 13, 2019

Wnt signaling and stem cell control.

Roel Nusse1

  • 1Howard Hughes Medical Institute, Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA. rnusse@stanford.edu

Cell Research
|April 9, 2008
PubMed
Summary

Wnt signaling pathways maintain stem cell self-renewal by regulating gene transcription. These pathways are crucial for balancing stem cell proliferation and differentiation in various tissues.

Area of Science:

  • Developmental Biology
  • Cell Signaling

Background:

  • Wnt signaling is a critical pathway regulating stem cell self-renewal and differentiation.
  • Wnt proteins interact with Frizzled and LRP receptors, initiating intracellular signal transduction.
  • Alternative Wnt signaling occurs via tyrosine kinase receptors like ROR and RYK.

Purpose of the Study:

  • To elucidate the role of Wnt signaling in maintaining stem cell self-renewal.
  • To describe the molecular mechanisms of Wnt signal transduction.
  • To highlight the dynamic expression of Wnt ligands and receptors during tissue development.

Main Methods:

  • Review of existing literature on Wnt signaling pathways.
  • Analysis of Wnt protein interactions with cell surface receptors.

More Related Videos

Modeling Paracrine Noncanonical Wnt Signaling In Vitro
11:14

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Published on: December 10, 2021

Related Experiment Videos

Last Updated: Jul 6, 2026

Isolation of Stem-like Cells from 3-Dimensional Spheroid Cultures
09:06

Isolation of Stem-like Cells from 3-Dimensional Spheroid Cultures

Published on: December 13, 2019

Modeling Paracrine Noncanonical Wnt Signaling In Vitro
11:14

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Published on: December 10, 2021

  • Examination of downstream transcriptional regulation by Wnt/ss-catenin/TCF complexes.

    • Main Results:

    • Wnt signaling maintains stem cells in an undifferentiated state.
    • Wnt signaling controls the balance between stem cell proliferation and differentiation.
    • Wnt signaling influences neural, mammary, and embryonic stem cells.

    Conclusions:

    • Wnt signaling is a key regulator of stem cell homeostasis.
    • Understanding Wnt pathways is vital for regenerative medicine and developmental biology.
    • Dynamic regulation of Wnt signaling ensures proper tissue growth and maintenance.