Vascular Mechanisms in Osteoarthritis Progression

Osteoarthritis has traditionally been considered a wear-and-tear disorder of articular cartilage, but growing evidence highlights the pivotal role of vascular processes in disease initiation and progression. Abnormal angiogenesis within the synovium and at the osteochondral junction promotes invasion of blood vessels into normally avascular cartilage, disrupting tissue homeostasis. Upregulated vascular endothelial growth factor (VEGF) signalling in chondrocytes and synovial cells drives vessel formation, enhances inflammatory cell recruitment and stimulates release of cartilage-degrading enzymes. Mechanical stress and reactive oxygen species further amplify VEGF expression, linking biomechanical and biochemical insults to vascular remodelling. In the subchondral bone, microvascular changes alter bone remodelling and contribute to osteophyte formation and pain sensitisation. Together, these vascular mechanisms form an interdependent network that accelerates cartilage breakdown, synovitis and joint dysfunction, pointing to novel targets for early diagnosis and intervention.

Research from Nature Portfolio

Genome-wide and functional studies have clarified how VEGF orchestrates both developmental and disease processes in joint tissues. In early postnatal cartilage, VEGF supports chondrocyte survival and endochondral ossification, yet its persistent elevation in models of surgically induced osteoarthritis shifts its role towards catabolism. Conditional depletion of Vegf in joint tissues attenuates cartilage erosion, while local administration of anti-VEGF antibodies or small-molecule VEGFR2 inhibitors reduces synovial inflammation, chondrocyte hypertrophy and subchondral bone changes. These findings demonstrate a direct causal link between VEGF-driven angiogenesis and osteoarthritis progression, validating vascular signalling pathways as therapeutic entry points.

Vascular Mechanisms in Osteoarthritis Progression publication trend

The graph below shows the total number of articles in vascular mechanisms in osteoarthritis progression across all publications each year (not limited to Nature Index journals).

Technical terms

Angiogenesis: Growth of new blood vessels from pre-existing vasculature.

Chondrocyte: Cartilage-forming cell responsible for extracellular matrix production.

Vascular Endothelial Growth Factor (VEGF): A signalling protein that stimulates endothelial cell proliferation and vessel formation.

Vascular Endothelial Growth Factor Receptor 2 (VEGFR2): A high-affinity receptor mediating the pro-angiogenic actions of VEGF.

Synovial Fluid: Viscous fluid within joint cavities that reflects local inflammatory and vascular changes.

Anti-angiogenic: Referring to the inhibition of new blood vessel formation.

References

1. Antiangiogenic Effect of Dopamine and Dopaminergic Agonists as an Adjuvant Therapeutic Option in the Treatment of Cancer, Endometriosis, and Osteoarthritis. International Journal of Molecular Sciences (2023).
2. A rapid VEGF-gene-sequence photoluminescence detector for osteoarthritis. Frontiers in Bioengineering and Biotechnology (2024).
3. Synovial fluid biomarkers associated with osteoarthritis severity reflect macrophage and neutrophil related inflammation. Arthritis Research & Therapy (2019).
4. Vascular Endothelial Growth Factor in Cartilage Development and Osteoarthritis. Scientific Reports (2017).
5. Bevacizumab, an anti-vascular endothelial growth factor antibody, inhibits osteoarthritis. Arthritis Research & Therapy (2014).
6. Reactive oxygen species induce expression of vascular endothelial growth factor in chondrocytes and human articular cartilage explants. Arthritis Research & Therapy (2006).
7. Mechanical Forces Induce Changes in VEGF and VEGFR-1/sFlt-1 Expression in Human Chondrocytes. International Journal of Molecular Sciences (2014).