Bioinspired porous core-shell microspheres with spatiotemporal delivery coordinate immunomodulatory-osteogenic coupling via NF-κB/P-STAT6 and Rho/MAPK signaling for enhanced calvarial regeneration.

ABSTRACT: Critical-sized calvarial defects remain a formidable clinical challenge due to dyssynchronous immunomodulation-osteogenesis coupling and unregulated growth factor release. Here, a bioinspired porous core-shell microsphere system (GCI@HPPS) is developed, integrating hydroxyapatite (HA)-loaded shell, surface-immobilized SDF-1α, and IGF-1-encapsulated cores to immunomodulate osteoimmune microenvironment and osteogenesis promotion. The hierarchical architecture achieved spatiotemporally programmed release: HA degradation-dependent mineralization, SDF-1α-mediated BMSC chemotaxis, and sustained IGF-1 delivery, mimicking natural bone repair cascades. Dual covalent/guest-host crosslinking (GelMA/Ac-β-CD) enhanced compressive strength, while polydopamine functionalization of microspheres conferred

SUBMITTER: Zheng J 

PROVIDER: S-EPMC12358963 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature