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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Calcium phosphate combination biomaterials as human mesenchymal stem cell delivery vehicles for bone repair.
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Calcium phosphate combination biomaterials as human mesenchymal stem cell delivery vehicles for bone repair.

机译:磷酸钙组合生物材料作为人类间充质干细胞递送载体,用于骨骼修复。

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摘要

A new class of biomimetic, bioresorbable apatitic calcium phosphate cement (CPC) was recently developed. The handling characteristics, and the ability to harden at body temperature in the presence of physiological saline, make this material an attractive clinical bone substitute and delivery vehicle for therapeutic agents in orthopedic applications. The major challenge with the material is formulating an injectable paste with options for cell delivery, in order to regenerate new bone faster and with high quality. In this study, three different additives and/or viscosity modifiers (carboxymethylcellulose, silk, and alginate) were incorporated into a CPC matrix. Injectability, cell viability, cell proliferation, surface morphology, and gene expression for osteogenesis of hMSCs were all evaluated. Injectable CPC-gel composites with cell protection were achieved. The CPC modified with alginate provided the best results based on cell proliferation, ALP and collagen production, and osteogenic transcript increases (for ALP, type I collagen, BSP, and OP). Furthermore, osteogenic analysis indicated lineage-specific differentiation of hMSCs into osteogenic outcomes. The results suggest that CPC mixed with alginate can be used as a cell delivery vehicle for bone regeneration.
机译:最近开发了一种新型的仿生,生物可吸收的脂肪族磷酸钙水泥(CPC)。处理特性以及在生理盐水存在下在室温下变硬的能力,使得该材料成为骨科应用中治疗剂的有吸引力的临床骨替代物和递送载体。这种材料的主要挑战是配制一种可注射的糊剂,该糊剂具有用于细胞递送的选项,以便更快且高质量地再生新骨。在这项研究中,将三种不同的添加剂和/或粘度调节剂(羧甲基纤维素,蚕丝和藻酸盐)掺入了CPC基质中。评估了hMSCs的可注射性,细胞生存力,细胞增殖,表面形态和成骨基因表达。获得了具有细胞保护功能的可注射CPC-gel复合材料。用藻酸盐修饰的CPC可以根据细胞增殖,ALP和胶原蛋白的产生以及成骨转录本的增加(对于ALP,I型胶原蛋白,BSP和OP)提供最佳结果。此外,成骨分析表明hMSCs沿袭特异性分化为成骨结局。结果表明,CPC与藻酸盐混合可以用作骨再生的细胞递送载体。

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