Department of Bioengineering, Rice University, Houston, TX 77251-1892, USA.
Adv Drug Deliv Rev. 2012 Sep;64(12):1292-309. doi: 10.1016/j.addr.2012.01.016. Epub 2012 Feb 4.
The controlled delivery of growth factors and cells within biomaterial carriers can enhance and accelerate functional bone formation. The carrier system can be designed with pre-programmed release kinetics to deliver bioactive molecules in a localized, spatiotemporal manner most similar to the natural wound healing process. The carrier can also act as an extracellular matrix-mimicking substrate for promoting osteoprogenitor cellular infiltration and proliferation for integrative tissue repair. This review discusses the role of various regenerative factors involved in bone healing and their appropriate combinations with different delivery systems for augmenting bone regeneration. The general requirements of protein, cell and gene therapy are described, with elaboration on how the selection of materials, configurations and processing affects growth factor and cell delivery and regenerative efficacy in both in vitro and in vivo applications for bone tissue engineering.
生物材料载体中生长因子和细胞的控制释放可以增强和加速功能性骨形成。载体系统可以设计具有预编程的释放动力学,以局部、时空方式最类似于自然愈合过程的方式递呈生物活性分子。载体还可以充当模仿细胞外基质的底物,以促进成骨细胞前体细胞的渗透和增殖,从而实现整合组织修复。本文讨论了参与骨愈合的各种再生因子的作用,以及它们与不同递释系统的适当组合,以增强骨再生。描述了蛋白、细胞和基因治疗的一般要求,并详细说明了材料、结构和处理的选择如何影响生长因子和细胞的递释以及在骨组织工程的体外和体内应用中的再生效果。