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Synergistic integration of bio-mineralized nanoparticles and porous microsphere scaffolds for dual bioactive delivery in bone regeneration

文献类型： 外文期刊

作者： He, Jian 1 ; Qiao, Liang 2 ; Fu, Qizhi 2 ; Zhang, Xiangchun 3 ; Liu, Jiayu 4 ; Li, Sanqiang 1 ; Hu, Xulin 4 ;

作者机构： 1.Henan Univ Sci & Technol, Coll Basic Med & Forens Med, Luoyang 471023, Peoples R China

2.Henan Univ Sci & Technol, Affiliated Hosp 1, Key Lab Neuromol Biol, Coll Clin Med, Luoyang 471003, Peoples R China

3.Chinese Acad Agr Sci, Tea Res Inst, Hangzhou 310008, Peoples R China

4.Chengdu Univ, Clin Med Coll, Chengdu 610081, Sichuan, Peoples R China

5.Chengdu Univ, Affiliated Hosp, Chengdu 610081, Sichuan, Peoples R China

关键词： Self-assembled biomimetic mineralized nanoparticles; Tea polyphenols; Magnesium; Porous microspheres; Antibacterial bone scaffolds

期刊名称：JOURNAL OF CONTROLLED RELEASE （ 影响因子：11.5； 五年影响因子：11.8 ）

ISSN： 0168-3659

年卷期： 2025 年 386 卷

页码：

收录情况： SCI

摘要： Conventional bone grafts face challenges in clinical applications, including donor shortages, immunological rejection, and mismatched degradation rates. This work introduces a porous microsphere scaffold loaded with self-assembled tea polyphenolic-magnesium biomineralized nanoparticles to synergistically enhance antibacterial and osteogenic properties through a dual-factor spatiotemporal controlled release approach. Employing a biomimetic mineralization mechanism that mimics natural bone mineral formation, these nanoparticles integrate tea polyphenols with magnesium ions. This method achieves pH-responsive release kinetics: the antimicrobial component releases more effectively in mildly acidic infection microenvironments, while the mineral phase acts as a buffer against burst release, maintaining consistent local medication concentrations. Complementing this sustained-release behavior, polytrimethylene carbonate microspheres degrade via surface erosion, thereby extending therapeutic efficacy through dual "degradation-release" regulation. In vitro studies demonstrated effective eradication of methicillin-resistant Staphylococcus aureus biofilms, along with significant enhancement of osteoblast proliferation, differentiation, and mineralization activities by the scaffold. The scaffold's porous structure mimics cancellous bone, providing an appropriate compression modulus (similar to 195 MPa), supporting cell infiltration, and facilitating nutrient transport, thereby simulating the three-dimensional architecture of native bone tissue. Moreover, the scaffold modulates macrophage polarization toward the M2 phenotype and stimulates the secretion of anti-inflammatory cytokines (IL-37, IL-10), thereby fostering a favorable bone immune microenvironment. This work establishes a multifunctional bone tissue engineering platform by integrating spatiotemporal delivery (dual controlled release) with biomimetic mineral stabilization. By addressing infection control, promoting bone regeneration, and modulating immune responses simultaneously, this scaffold presents a promising solution for complicated infected bone defects.

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