Related Experiment Video
Updated: Aug 5, 2026

06:55
Polarized Translocation of Fluorescent Proteins in Xenopus Ectoderm in Response to Wnt Signaling
Published on: May 26, 2011
Summary
Secreted Wnt proteins guide embryonic development in vertebrates. Dishevelled protein links Wnt signaling to cell polarization, revealing conserved mechanisms between vertebrate gastrulation and Drosophila epithelial development.
Area of Science:
- Developmental Biology
- Cell Biology
- Molecular Biology
Background:
- Secreted Wnt proteins are crucial signaling molecules regulating embryonic development.
- Morphogenetic movements, essential for forming tissues and organs, are controlled by Wnt pathways.
- Dishevelled is a key intracellular mediator in the Wnt signaling cascade.
Discussion:
- The study highlights conserved molecular mechanisms across species.
- Unexpected similarities were found between vertebrate gastrulation and Drosophila epithelial cell polarization.
- Dishevelled's role underscores its importance in fundamental cellular processes.
Key Insights:
- Wnt signaling and Dishevelled are central to coordinating cell movements during vertebrate embryogenesis.
- The findings reveal a conserved link between Wnt pathway activity and epithelial cell polarity.
- This suggests shared evolutionary origins for developmental processes in distantly related organisms.
Outlook:
- Further research can elucidate the precise molecular interactions of Dishevelled in both contexts.
- Investigating Wnt pathway conservation may offer insights into developmental disorders.
- Comparative studies can refine our understanding of fundamental cell biology.
Related Concept Videos
Gastrulation
Gastrulation establishes the three primary tissues of an embryo: the ectoderm, mesoderm, and endoderm. This developmental process relies on a series of intricate cellular movements, which in humans transforms a flat, “bilaminar disc” composed of two cell sheets into a three-tiered structure. In the resulting embryo, the endoderm serves as the bottom layer, and stacked directly above it is the intermediate mesoderm, and then the uppermost ectoderm. Respectively, these tissue strata will form...
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 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...
Cell Polarization by Rho Proteins
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
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 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...
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...

