ReviewFrontiers in immunology2026
Pre-antigenic regulatory signals in osteoarthritis: modulators of dendritic cell activation and joint immune balance.
Review in Frontiers in immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Osteoarthritis (OA) is now recognized as an immune-metabolic disorder rather than a simple wear-and-tear disease. Dendritic cells (DCs) in the synovium and subchondral bone link mechanical, biochemical, and metabolic stress to immune imbalance. In the early stage of immune activation, pre-antigenic regulatory signals act before classical antigen presentation and influence how DCs shape joint immunity. Increased extracellular matrix (ECM) stiffness activates the Integrin-FAK-NF-κB pathway, driving inflammatory or exhausted DC states. ECM fragments and damage-associated molecular patterns (DAMPs) stimulate pattern recognition receptors (PRRs), inducing cytokines that sustain chronic inflammation. Hypoxia, lactate, and oxidative stress reprogram DC metabolism, suppress IL-12, and promote Th17 responses. Targeting these upstream factors offers new therapeutic opportunities. Strategies that modify matrix stiffness, block DAMP-mediated signaling, or restore metabolic balance can help reset DC function and preserve joint homeostasis. Emerging biomaterial-based approaches further provide a foundation for immune-restorative and regenerative therapies. In the future, integrating DC-modulatory materials with personalized immune profiling may enable precise immuno-regenerative treatments for OA, representing a shift from symptom relief to immune-guided cartilage repair.
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