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Related Concept Videos

Canonical Wnt Signaling Pathway02:54

Canonical Wnt Signaling Pathway

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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...
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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...
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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during...
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Fractures: Bone Repair01:27

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Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
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Following injury, the integrity of the injured tissues must be reestablished. For example, in skin tissue, wound repair involves coordination among resident skin cells, blood mononuclear cells, extracellular matrix, growth factors, and cytokines to complete the healing cascade.
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Updated: Dec 17, 2025

Modeling Paracrine Noncanonical Wnt Signaling In Vitro
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Wnt modulation in bone healing.

Drew Schupbach1, Marianne Comeau-Gauthier1, Edward Harvey2

  • 1Department of Surgery, Division of Orthopedic Surgery, McGill University, Montreal General Hospital, 1650 Cedar Avenue, Room A10-110, Montreal, Québec H3G 1A4, Canada; Experimental Surgery, Faculty of Medicine, McGill University, Montreal General Hospital, 1650 Cedar Avenue, Room A7-117, Montreal, Québec H3G 1A4, Canada.

Bone
|June 23, 2020
PubMed
Summary

The Wnt signaling pathway shows promise for enhancing bone regeneration and fracture repair. Studies in animal models reveal its role in stem cell activity, guiding future therapeutic strategies for bone healing.

Keywords:
BMPBoneDKK1Fracture healingGlycogen synthase kinase 3βPTHSOSTSclerostinWnt signalingβ-catenin

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Area of Science:

  • Orthopaedics
  • Regenerative Medicine
  • Molecular Biology

Background:

  • Genetic studies offer tools to improve fracture and delayed union management.
  • The Wnt signaling pathway is vital for development and organ maintenance, showing potential for bone regeneration.
  • Wnt signaling directly influences stem cells, making it a target for stimulating bone repair post-trauma.

Purpose of the Study:

  • To review studies on modulating the canonical Wnt pathway in animal bone regeneration models.
  • To elucidate the roles of Wnt and β-catenin in fracture healing.
  • To discuss current and future therapeutic strategies targeting Wnt signaling for bone repair.

Main Methods:

  • Review of recent literature on Wnt pathway modulation in bone regeneration.
  • Analysis of thirty transgenic studies investigating Wnt signaling in bone repair.
  • Examination of thirty-eight pharmacological studies on Wnt pathway activation for bone healing.

Main Results:

  • The Wnt pathway's influence on stem cells is crucial for bone regeneration.
  • Transgenic and pharmacological studies demonstrate Wnt pathway's role in fracture healing.
  • Clinical trials involving sclerostin, lithium, and Dkk antibodies provide insights into Wnt pathway modulation.

Conclusions:

  • Modulating the Wnt signaling pathway is a promising strategy for enhancing bone repair.
  • Combination therapies and ongoing clinical trials offer future opportunities for bone regeneration.
  • Further research into Wnt pathway manipulation can lead to improved treatments for fractures and delayed unions.