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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...

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...

Catenins

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...

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...

Determination

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...

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Related Experiment Video

Updated: Dec 3, 2025

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

Published on: December 10, 2021

Wnt/β-Catenin Signaling Promotes the Formation of Preodontoblasts In Vitro.

A Vijaykumar¹, S H Root¹, M Mina¹

¹Department of Craniofacial Sciences, University of Connecticut Health Center, Farmington, CT, USA.

Journal of Dental Research

|October 26, 2020

Summary

Wnt signaling promotes odontoblast differentiation and survival in dental pulp cells. This finding offers insights for vital pulp therapy and dentin regeneration strategies.

Keywords:

WNT3a dentinogenesis odontoblast osteoblasts pulp biology survival

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Last Updated: Dec 3, 2025

Modeling Paracrine Noncanonical Wnt Signaling In Vitro

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Published on: December 10, 2021

Use of Trowell-Type Organ Culture to Study Regulation of Dental Stem Cells

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Published on: July 8, 2021

The Soft Agar Colony Formation Assay

The Soft Agar Colony Formation Assay

Published on: October 27, 2014

Area of Science:

Biochemistry
Cell Biology
Regenerative Medicine

Background:

Odontoblast differentiation is crucial for dentinogenesis, a process regulated by signaling pathways like Wnt/β-catenin.
The precise role of Wnt/β-catenin in dentinogenesis remains unclear, with conflicting reports on its effects.

Purpose of the Study:

To elucidate the role of Wnt/β-catenin signaling in odontoblast differentiation and dentinogenesis.
To investigate the effects of WNT3a on dental pulp cells using transgenic mice models.

Main Methods:

Utilized dental pulp cells from transgenic mice expressing fluorescent markers for differentiation stages.
Exposed pulp cells to WNT3a at varying times and durations.
Analyzed cell survival, preodontoblast formation (2.3GFP+), and differentiation markers (DMP1-Cherry, DSPP-Cerulean).

Main Results:

WNT3a treatment did not induce premature odontoblast differentiation but supported undifferentiated cell survival.
Promoted the formation of preodontoblasts and their transition to differentiated odontoblasts.
Enhanced osteogenesis in dental pulp cultures.

Conclusions:

Wnt/β-catenin signaling, specifically WNT3a, supports dental pulp cell survival and promotes odontoblast and osteoblast differentiation.
Findings are critical for developing improved vital pulp therapy and dentin regeneration treatments.