Biomimetics of the Extracellular Matrix: An Integrated Three-Dimensional Fiber-Hydrogel Composite for Cartilage Tissue Engineering.

Biomimetics of the Extracellular Matrix: An Integrated Three-Dimensional Fiber-Hydrogel Composite for Cartilage Tissue Engineering.
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DOI:
10.12989/sss.2011.7.3.213
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发表时间:
2011-01-01
影响因子:
3.5
通讯作者:
Elisseeff J
Elisseeff J
中科院分区:
工程技术3区
文献类型:
--
作者:
Coburn J;Gibson M;Bandalini PA;Laird C;Mao HQ;Moroni L;Seliktar D;Elisseeff J

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天然细胞外基质(ECM)由整合的纤维蛋白网络和基于蛋白聚糖的基质(水凝胶)物质组成。我们设计了一种新的静电纺丝技术来设计三维纤维-水凝胶复合材料,该复合材料模仿天然ECM结构,是可注射的,并且具有用于临床相关组织缺损的实际宏观尺寸。在关节软骨组织工程的模型系统中,纤维-水凝胶复合材料增强了成体干细胞的生物反应,动态机械刺激导致细胞外基质接近天然水平。该技术平台通过纤维的结构和生物化学改性而扩展,包括含有硫酸软骨素(内源性组织的重要组分)的亲水性纤维和含有ECM微粒的疏水性纤维。
The native extracellular matrix (ECM) consists of an integrated fibrous protein network and proteoglycan-based ground (hydrogel) substance. We designed a novel electrospinning technique to engineer a three dimensional fiber-hydrogel composite that mimics the native ECM structure, is injectable, and has practical macroscale dimensions for clinically relevant tissue defects. In a model system of articular cartilage tissue engineering, the fiber-hydrogel composites enhanced the biological response of adult stem cells, with dynamic mechanical stimulation resulting in near native levels of extracellular matrix. This technology platform was expanded through structural and biochemical modification of the fibers including hydrophilic fibers containing chondroitin sulfate, a significant component of endogenous tissues, and hydrophobic fibers containing ECM microparticles.
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