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Abstract: The pathological microenvironment of osteoporosis poses a substantial clinical challenge for bone defect regeneration. Through single-cell RNA-sequencing (scRNA-seq) analysis, we identified a reactive oxygen species (ROS)-overloading osteoblast subpopulation as a critical pathological feature of osteoporotic niches. Guided by scRNA-seq analysis, we engineered a microenvironment-adaptive hydrogel system through precise integration of antioxidant curcumin-encapsulated zeolitic imidazolate framework-8 nanoparticles (CCM@ZIF-8 NPs) within photo-crosslinkable alginate methacrylate (AlgMA) hydrogel (AlgMA/CCM@ZIF-8). This engineered design exhibited dual functions: effectively scavenging ROS in bone marrow-derived mesenchymal stem cells (BMSCs) while simultaneously suppressing osteoclast differentiation. The osteo-regenerative superiority of the AlgMA/CCM@ZIF-8 nanocomposite hydrogel was conclusively demonstrated in bone defect models of osteoporotic mice. This scRNA-seq-informed engineering strategy offers a promising approach for developing pathophysiology-adapted biomaterials to promote regenerative repair in osteoporotic bone defects.

基于单细胞转录组测序分析：设计活性氧清除水凝胶及其在骨质疏松性骨再生中的应用

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