通过直接聚合物熔体沉积和静电纺丝开发双尺度支架用于组织再生应用。
Development of dual scale scaffolds via direct polymer melt deposition and electrospinning for applications in tissue regeneration.
作者信息
Park Suk Hee, Kim Taek Gyoung, Kim Hyo Chan, Yang Dong-Yol, Park Tae Gwan
机构信息
School of Mechanical Engineering and Aerospace System, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea.
出版信息
Acta Biomater. 2008 Sep;4(5):1198-207. doi: 10.1016/j.actbio.2008.03.019. Epub 2008 Apr 15.
The objective of this study was the fabrication of highly functionalized polymeric three-dimensional (3D) structures characterized by nano and microfibers for use as an extracellular matrix-like tissue engineering scaffold. A hybrid process utilizing direct polymer melt deposition (DPMD) and an electrospinning method were employed to obtain the structure. Each microfibrous layer of the scaffold was built using the DPMD process in accordance with computer-aided design modeling data considering some structural points such as pore size, pore interconnectivity and fiber diameter. Between the layers of the three-dimensional structure, polycaprolactone/collagen nanofiber matrices were deposited via an electrospinning process. To evaluate the fabricated scaffolds, chondrocytes were seeded and cultured within the developed scaffolds for 10 days, and the levels of cell adhesion and proliferation were monitored. The results showed that the polymeric scaffolds with nanofiber matrices fabricated using the proposed hybrid process provided favorable conditions for cell adhesion and proliferation. These conditions can be attributed to enhanced cytocompatibility of the scaffold due to surficial nanotopography in the scaffold, chemical composition by use of a functional biocomposite, and an enlarged inner surface of the structure for cell attachment and growth.
本研究的目的是制造具有纳米和微纤维特征的高功能化聚合物三维(3D)结构,用作细胞外基质样组织工程支架。采用直接聚合物熔体沉积(DPMD)和静电纺丝方法的混合工艺来获得该结构。支架的每个微纤维层使用DPMD工艺,根据计算机辅助设计建模数据构建,同时考虑一些结构要点,如孔径、孔互连性和纤维直径。在三维结构的各层之间,通过静电纺丝工艺沉积聚己内酯/胶原蛋白纳米纤维基质。为了评估所制造的支架,将软骨细胞接种到所开发的支架中并培养10天,并监测细胞粘附和增殖水平。结果表明,使用所提出的混合工艺制造的带有纳米纤维基质的聚合物支架为细胞粘附和增殖提供了有利条件。这些条件可归因于支架表面纳米拓扑结构增强了支架的细胞相容性、使用功能性生物复合材料的化学成分以及结构内表面扩大以促进细胞附着和生长。