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Related Concept Videos

Catenins01:23

Catenins

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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...
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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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Non-Canonical Wnt Signaling Pathways01:41

Non-Canonical Wnt Signaling Pathways

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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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Tension Response at Adherens Junctions01:26

Tension Response at Adherens Junctions

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin...
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Osteoclasts in Bone Remodeling01:31

Osteoclasts in 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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Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

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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

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Reconstitution Of β-catenin Degradation In Xenopus Egg Extract
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β-Catenin: A Key Molecule in Osteoblast Differentiation.

Edyta Wróbel1, Piotr Wojdasiewicz1, Agnieszka Mikulska1

  • 1Department of Biophysics, Physiology and Pathophysiology, Faculty of Health Sciences, Medical University of Warsaw, Chałubińskiego 5, 02-004 Warsaw, Poland.

Biomolecules
|July 29, 2025
PubMed
Summary

Beta-catenin signaling regulates bone health by controlling osteoblast activity. This review details how various factors influence beta-catenin, offering insights into bone disease treatments.

Keywords:
Wnt signalingbonedifferentiation of osteoblastsosteoblastsβ-catenin

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Related Experiment Videos

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Area of Science:

  • Bone biology
  • Cell signaling
  • Molecular medicine

Background:

  • Beta-catenin is crucial for osteoblast differentiation, proliferation, and bone homeostasis.
  • It interacts with transcription factors like TCF/LEF, Runx2, and Osx to control osteogenesis-related gene expression.

Purpose of the Study:

  • To review how physiological and pathological factors modulate beta-catenin signaling in bone.
  • To provide a comprehensive understanding of beta-catenin's dynamic regulation in bone biology.

Main Methods:

  • Literature review integrating findings on modulators of Wnt/beta-catenin signaling.
  • Analysis of how diverse factors impact osteoblast function via beta-catenin.

Main Results:

  • Beta-catenin signaling is influenced by mechanical loading, oxidative stress, HIV-1 gp120, fluoride, implant topography, and microRNAs.
  • These factors exert varied and often opposing effects on osteoblast function.
  • The interplay of these modulators highlights the complexity of beta-catenin regulation.

Conclusions:

  • Understanding the multifaceted regulation of beta-catenin is key to developing therapeutic strategies.
  • Potential applications include bone regeneration, metabolic bone diseases, HIV-associated bone loss, and osteosarcoma treatment.