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Non-Canonical Wnt Signaling Pathways

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 Pathways

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...

Canonical Wnt Signaling Pathway

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 Pathway

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...

Mechanism of Lamellipodia Formation

Mechanism of Lamellipodia Formation

Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...

Role Of Notch Signalling In Intestinal Stem Cell Renewal

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...

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Related Experiment Video

Updated: May 13, 2026

Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

Published on: December 14, 2015

Wnt secretion and gradient formation.

Gonzalo P Solis¹, Anne-Marie Lüchtenborg, Vladimir L Katanaev

¹Department of Pharmacology and Toxicology, University of Lausanne, Rue du Bugnon 27, Lausanne CH-1005, Switzerland. Gonzalo.Solis@unil.ch.

International Journal of Molecular Sciences

|March 5, 2013

Summary

Reggie/flotillin proteins facilitate Wnt morphogen spreading by influencing secretion and diffusion. Two models propose their roles in Wnt transport, impacting development and cancer.

More Related Videos

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Published on: December 10, 2021

Related Experiment Videos

Last Updated: May 13, 2026

Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients

Published on: December 14, 2015

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Published on: December 10, 2021

Area of Science:

Developmental Biology
Cell Biology
Cancer Research

Background:

Wnt morphogens are crucial for embryonic development and tissue maintenance.
Wnt signaling is implicated in various human diseases, particularly cancer.
Mechanisms of Wnt secretion and gradient formation are not fully understood.

Purpose of the Study:

To revise current views on Wnt secretion and spreading.
To propose models for the role of reggie/flotillin proteins in Wnt transport.
To discuss implications for human breast cancer.

Main Methods:

Utilizing Drosophila melanogaster as a model organism.
Investigating the influence of lipid raft-associated reggie/flotillin proteins on Wnt secretion.
Analyzing Wnt molecule pools and their diffusion properties.

Main Results:

Reggie/flotillin proteins are essential for Wnt secretion and spreading in Drosophila.
Wnt molecules are secreted in at least two pools: poorly diffusible and highly diffusible.
The highly diffusible pool is dependent on reggie/flotillins for long-range spreading.

Conclusions:

Reggie/flotillins may regulate Wnt endocytosis and apical secretion for long-range diffusion.
Lipid rafts organized by reggie/flotillins might act as "dating points" for Wnt-lipoprotein receptor interaction.
Understanding these Wnt transport mechanisms could reveal novel therapeutic targets for cancer.