首页> 外文期刊>Acta biomaterialia >Modified PHBV scaffolds by in situ UV polymerization: structural characteristic, mechanical properties and bone mesenchymal stem cell compatibility.
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Modified PHBV scaffolds by in situ UV polymerization: structural characteristic, mechanical properties and bone mesenchymal stem cell compatibility.

机译:通过原位UV聚合修饰的PHBV支架:结构特征,机械性能和骨间充质干细胞相容性。

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摘要

An ideal scaffold provides an interface for cell adhesion and maintains enough biomechanical support during tissue regeneration. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) scaffolds with pore sizes ranging from 100 to 500 microm and porosity approximately 90% were prepared by the particulate-leaching method, and then modified by the introduction of polyacrylamide (PAM) on the inner surface of scaffolds using in situ UV polymerization, with the aim of enhancing the biological and mechanical properties of the PHBV scaffolds. The modified PHBV scaffolds had interconnected pores with porosity of 75.4-78.6% and pore sizes at peak volume from 20 to 50 microm. The compressive load and modulus were up to 62.45 N and 1.06 MPa, respectively. The water swelling percentage (WSP) of the modified PHBV scaffolds increased notably compared with that of the PHBV scaffolds, with the maximum WSP at 537%. Sheep bone mesenchymal stem cells (BMSC) were cultured on the PHBV and modified PHBV. The hydrophilic PAM chains did not influence BMSC viability or proliferation index, but the initial cell adhesion at 1h of culture was enhanced significantly. Framing PHBV scaffold along with gel-like PAM chains inside is a novel model of inner surface modification for PHBV scaffolds, which shows potential in tissue engineering applications.
机译:理想的支架可提供细胞粘附的界面,并在组织再生期间保持足够的生物力学支持。通过颗粒浸出法制备孔径为100至500微米,孔隙率约为90%的聚(3-羟基丁酸酯-共3-羟基戊酸酯)(PHBV)支架,然后通过引入聚丙烯酰胺(PAM)进行改性使用原位UV聚合法在支架的内表面上进行修饰,目的是增强PHBV支架的生物学和机械性能。改性的PHBV支架具有相互连通的孔隙,孔隙率为75.4-78.6%,峰值体积的孔径为20至50微米。压缩载荷和模量分别高达62.45 N和1.06 MPa。与PHBV支架相比,改性PHBV支架的水溶胀百分比(WSP)显着增加,最大WSP为537%。在PHBV和修饰的PHBV上培养绵羊骨间充质干细胞(BMSC)。亲水性PAM链不影响BMSC的生存力或增殖指数,但培养1h时的初始细胞黏附力显着增强。将PHBV支架与内部的凝胶状PAM链一起构图是PHBV支架的内表面改性的新模型,显示了在组织工程应用中的潜力。

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