Bidirectional regulation between bone and vasculature: Mechanisms of osteogenesis and angiogenesis

Area of Science:

• Bone biology and vascular biology
• Skeletal homeostasis and disease mechanisms
• Molecular regulation of bone and vasculature

Background:

• The skeletal and vascular systems are intricately linked, maintaining bone homeostasis through distinct mechanisms in intramembranous and endochondral ossification.
• Imbalances in this bidirectional regulation contribute to bone pathologies such as osteoporosis, osteoarthritis, and rheumatoid arthritis.

Purpose of the Study:

• To dissect the molecular networks governing bone-vascular crosstalk.
• To clarify the physiological and pathological regulatory mechanisms involved.
• To highlight the therapeutic potential of targeting the vascular microenvironment for bone diseases.

Main Methods:

• Review of existing literature on bone-vascular interactions.
• Analysis of molecular signaling pathways (e.g., VEGF, PDGF, miRNAs, BMP-SMAD, Notch, HIF).
• Discussion of therapeutic strategies targeting the bone-vascular interface.

Main Results:

• Osteogenic cells regulate angiogenesis through pathways including VEGF, PDGF, and miRNAs.
• Vascular endothelial cells modulate osteogenesis via BMP-SMAD, Notch, and HIF signaling.
• Bone-vascular crosstalk is a key factor in both normal bone metabolism and disease pathogenesis.

Conclusions:

• Understanding bone-vascular crosstalk is essential for addressing bone diseases.
• Targeting the vascular microenvironment presents a promising avenue for novel therapeutic interventions.
• This review provides a foundation for translational research in precision therapies for bone diseases.