材料科学
超顺磁性
复合数
脚手架
再生(生物学)
骨关节炎
体内
纳米技术
生物医学工程
复合材料
工程类
细胞生物学
医学
磁化
生物
生物技术
物理
替代医学
病理
量子力学
磁场
作者
Mayifei Rong,Dingge Liu,Xiaoguang Xu,Ang Li,Yihua Bai,Gang Yang,Kaiping Liu,Zhihua Zhang,Langran Wang,Kai Wang,Liying Lu,Yong Jiang,Ji Liu,Xin Zhang
标识
DOI:10.1002/adma.202405641
摘要
Abstract Osteoarthritis (OA) is a prevalent disease, characterized by subchondral fractures in its initial stages, which has no precise and specific treatment now. Here, a novel multifunctional scaffold is synthesized by photopolymerizing glycidyl methacrylate‐modified hyaluronic acid (GMHA) as the matrix in the presence of hollow porous magnetic microspheres based on hydroxyapatite. In vivo subchondral bone repairing results demonstrate that the scaffold's meticulous design has most suitable properties for subchondral bone repair. The porous structure of inorganic particles within the scaffold facilitates efficient transport of loaded exogenous vascular endothelial growth factor (VEGF). The Fe 3 O 4 nanoparticles assembled in microspheres promote the osteogenic differentiation of bone marrow mesenchymal stem cells and accelerate the new bone generation. These features enable the scaffold to exhibit favorable subchondral bone repair properties and attain high cartilage repair scores. The therapy results prove that the subchondral bone support considerably influences the upper cartilage repair process. Furthermore, magnetic resonance imaging monitoring demonstrates that Fe 3 O 4 nanoparticles, which are gradually replaced by new bone during osteochondral defect repair, allow a noninvasive and radiation‐free assessment to track the newborn bone during the OA repair process. The composite hydrogel scaffold (CHS) provides a versatile platform for biomedical applications in OA treatment.
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