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Updated: Jun 17, 2026
08:01
Stimulation of Notch Signaling in Mouse Osteoclast Precursors
Published on: February 28, 2017
Notch and the skeleton
Stefano Zanotti1, Ernesto Canalis
1Department of Research, Saint Francis Hospital and Medical Center, 114 Woodland Street, Hartford, CT 06105-1299, USA.
Molecular and Cellular Biology
|December 10, 2009
Summary
Notch signaling regulates cell fate and is crucial for skeletal development. Its dysregulation is linked to bone diseases, highlighting its role in skeletal health and disease.
Area of Science:
- Cell Biology
- Developmental Biology
- Molecular Biology
Background:
- Notch receptors are key regulators of cell fate decisions.
- Notch signaling involves ligand binding, receptor cleavage, and nuclear translocation of the Notch intracellular domain (NICD).
- The NICD-CSL-MAML complex activates target genes like Hes and Hey, influencing cellular processes.
Purpose of the Study:
- To elucidate the role of Notch signaling in skeletal development and mesenchymal stem cell differentiation.
- To investigate the consequences of Notch pathway misexpression and inactivation in skeletal tissues.
- To explore the involvement of Notch signaling in hematopoietic stem cell regulation and skeletal diseases.
Main Methods:
- Analysis of Notch receptor function in mammalian systems.
- Investigating the effects of Notch overexpression and conditional inactivation in skeletal tissues.
- Examining Notch ligand expression in the hematopoietic stem cell niche.
Main Results:
- Notch signaling inhibits skeletal development and postnatal bone formation, with overexpression causing osteopenia.
- Conditional Notch inactivation in the skeleton increases bone volume and enhances osteoblastic differentiation.
- Notch ligands regulate hematopoietic stem cell self-renewal, and Notch dysregulation is implicated in skeletal disorders.
Conclusions:
- Notch signaling plays a critical inhibitory role in skeletal development and bone formation.
- Aberrant Notch signaling contributes to skeletal pathologies such as Alagille syndrome, spondylocostal dysostosis, and potentially osteosarcoma.
- Targeting Notch signaling may offer therapeutic strategies for skeletal diseases.
Related Concept Videos
03:14Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
03:14Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
01:12Carbon Skeletons
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side chains...
01:21Skeleton and Calcium Homeostasis
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01:55Bone Structure
Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
01:12Role 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...