Longevity & AgingEngineered Nanoparticles Coated in Chondrocyte Membranes Block Arthritis at Two Levels
Researchers created HKL-GECM@MPNPs, nanoparticles loaded with honokiol (a mitochondria-targeting compound) and coated with genetically engineered chondrocyte membranes overexpressing IL-1R2, a decoy receptor that traps the inflammatory cytokine IL-1β. When injected into osteoarthritic mouse joints, the particles fuse with chondrocytes, transferring IL-1R2 to neutralize extracellular inflammation while delivering honokiol directly to mitochondria to restore sirtuin-3 (SIRT3), a protective enzyme depleted in OA. This dual-action approach reduced inflammation, alleviated joint pain, and preserved cartilage in mouse models. It also reversed cartilage degeneration in human OA explants, suggesting strong translational potential.
