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Updated: Jul 31, 2025

Culturing and Measuring Fetal and Newborn Murine Long Bones
Published on: April 26, 2019
Local coordination between intracortical bone remodeling and vascular development in human juvenile bone
Christina Møller Andreasen1, Bilal Mohamad El-Masri1, Birgit MacDonald2
1Molecular Bone Histology lab, Pathology Research Unit, Department of Clinical Research, University of Southern Denmark, Denmark; Department of Pathology, Odense University Hospital, Odense, Denmark; Department of Molecular Medicine, University of Southern Denmark, Denmark.
Intracortical bone resorption is coordinated with vascular development. Osteoclasts drive this process by expressing vascular endothelial growth factor-A (VEGFA), guiding the vascular network
Area of Science:
- Bone biology
- Vascular biology
- Skeletal development
Background:
- Vascularization is crucial for skeletal health, yet its role in intracortical bone remodeling remains unclear.
- Intracortical bone compartments require a vascular network for proper function and development.
Purpose of the Study:
- To investigate the coordination between intracortical bone resorption and vascular network development.
- To elucidate the mechanisms driving vascularization during bone remodeling.
Main Methods:
- Analysis of human proximal femoral cortical bone (n=11, aged 6-15 years).
- 2D and 3D imaging techniques to assess vascular structures and their organization.
- Immunohistochemical analysis of osteoclasts and endothelial cells for vascular endothelial growth factor-A (VEGFA) and its receptors.
Main Results:
- Non-quiescent and remodeling pores (Type 2) exhibited higher vascularization than quiescent and de novo pores (Type 1).
- Pores in the eroded-formative remodeling stage showed the most vascular structures.
- Osteoclasts expressed VEGFA, and its receptors were found on endothelial cells, indicating a signaling pathway.
Conclusions:
- Osteoclast-derived VEGFA drives vascular network progression during intracortical bone remodeling.
- The vascular network dynamically adapts to the demands of bone remodeling events.
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