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目的 开发一种多功能纳米颗粒输送系统来刺激骨再生和血管形成,用于逆转骨质疏松症。方法 通过制备基于外消旋聚乳酸 Poly(D,L-lactide)即PLA的纳米颗粒来封装淫羊藿苷。随后,通过红细胞膜包被这些纳米颗粒以增强生物相容性。为了提高靶向特异性,进一步合成了由阿仑膦酸盐修饰的聚乙二醇-磷脂酰乙醇胺(PEG-DSPE) 组成的骨靶向聚合物脂质,并将其掺入细胞膜涂层中。结果 多功能纳米颗粒输送系统可通过调节骨髓间充质干细胞 (BMSC)功能,从而增强成骨和血管生成能力。结论 本研究结果表明,多功能纳米颗粒输送系统可以在体外刺激骨形成和血管形成,表明其有成为骨质疏松症先进治疗策略的潜力。
Objective To developed a multifunctional nanoparticle system to stimulate bone regeneration and vascularization as a therapeutics strategy for osteopovost.Methods Poly(D,L-lactide)(PLA)-based nanoparticles were fabricated to encapsulate the icariin,which is renowned for its osteogenic potential.These nanoparticles were then coated with red blood cell membranes to enhance biocompatibility.To further improve targeting specificity,a bone-targeted polymer-lipid consisting of alendronate-modified PEG-DSPE was synthesized and incorporated into the cell membrane coating.Results The delivery system was designed to modulate the function of bone marrow mesenchymal stem cells,thereby enhancing both osteogenesis and angiogenesis.Conclusions Our findings demonstrated that the therapeutic system could enhance bone formation and vascularization in vitro,indicating its potential as an advanced treatment strategy for osteoporosis.