Sustained Hypoxia-Inducible Factor 1-Alpha Accumulation Disrupts the Articular Niche to Promote Osteoarthritis Pathogenesis - PubMed
4 hours ago
- #Osteoarthritis
- #Cartilage Degradation
- #HIF-1α
- Sustained HIF-1α accumulation acts as a pathogenic driver in osteoarthritis (OA), causing joint destruction.
- Chondrocyte-specific HIF-1α overexpression triggers spontaneous OA and worsens post-traumatic joint degeneration.
- Continuous HIF-1α activation leads to pathological angiogenesis, disrupting the avascular cartilage niche and causing metabolic dysregulation and matrix degradation.
- HIF-1α activation in synovial and superficial cartilage compartments causes slow, late-onset OA through chronic inflammation and suppressed Col2a1 expression.
- Inflammatory priming from sustained HIF-1α creates a vulnerable joint environment, accelerating trauma-induced collapse.
- Transient whole-joint HIF-1α induction via lipid nanoparticles replicates these detrimental effects, highlighting its role as a broad disease amplifier.
- Targeted inhibition of HIF-1α is proposed as a promising therapeutic strategy for OA.