首页> 外文期刊>Acta biomaterialia >Modulation of collagen II fiber formation in 3-D porous scaffold environments.
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Modulation of collagen II fiber formation in 3-D porous scaffold environments.

机译:在3-D多孔支架环境中调节II型胶原纤维的形成。

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摘要

Collagen II, a major extracellular matrix component in cartilaginous tissues, undergoes fibrillogenesis under physiological conditions. The present study explored collagen II fiber formation in solution and in two- (coverslip) and three-dimensional (scaffold) environments under different incubation conditions. These conditions include variations in adsorption buffers, the presence of 1-ethyl-3-(3-dimenthylaminopropyl) carbodiimide/N-hydroxysuccinimide crosslinker and the nature of the material surfaces. We extend our observations of collagen II fiber formation in two dimensions to develop an approach for the formation of a fibrillar collagen II network throughout surface-modified polylactide-co-glycolide porous scaffolds. Morphologically, the collagen II network is similar to that present in native articular cartilage. Biological validation of the resultant optimized functional scaffold, using rat bone marrow-derived mesenchymal stem cells, shows appreciable cell infiltration throughout the scaffold with enhanced cell spreading at 24h post-seeding. This economic and versatile approach is thus believed to have significant potential in cartilage tissue engineering applications.
机译:胶原II是软骨组织中的主要细胞外基质成分,在生理条件下会发生纤维化。本研究探讨了在不同孵育条件下,在溶液中以及在二维(盖玻片)和三维(支架)环境中胶原II纤维的形成。这些条件包括吸附缓冲液的变化,1-乙基-3-(3-二薄荷基氨基丙基)碳二亚胺/ N-羟基琥珀酰亚胺交联剂的存在以及材料表面的性质。我们从二维扩展了对胶原蛋白II纤维形成的观察,以开发一种在整个表面改性的聚丙交酯-乙交酯共聚多孔支架中形成纤维状胶原蛋白II网络的方法。在形态上,II型胶原蛋白网络类似于天然关节软骨中的网络。使用大鼠骨髓来源的间充质干细胞对所得优化功能支架的生物学验证显示,整个支架有明显的细胞浸润,且播种后24h细胞扩散性增强。因此,认为这种经济且通用的方法在软骨组织工程应用中具有巨大的潜力。

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