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Hyaluronan hydration generates three-dimensional meso-scale structure in engineered collagen tissues

机译:透明质酸水合在工程胶原组织中产生三维介观结构

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摘要

Here, we show that the local incorporation of osmotically active hyaluronan into previously compressed collagen constructs results in further rapid dehydration/compression of collagen layers, channel formation and generation of new interfaces; these novel structures, at the nano–micro (i.e. meso-scale) were formed within native collagen gels, in a highly predictable spatial manner and offer important new methods of fabricating scaffolds (e.g. tubes and open-spirals) with potential for use in tissue regeneration such as in peripheral nerves and small vessels. This paper tests the possibility that the local fluid content of a dense collagen network can be controlled by incorporation of an osmotically active (native) macromolecule—hyluronan. This is an exemplar physiological, osmotic swelling agent. Hyaluronan is commonly secreted by cells deep in connective tissues, so is a good candidate for this role in a cell-driven system balancing mechanical compaction of bulk tissue collagen. These constructs may have potential as functional in vitro models representing developmental and pathological processes.
机译:在这里,我们表明渗透活性的透明质酸在先前压缩的胶原蛋白结构中的局部掺入导致胶原蛋白层的进一步快速脱水/压缩,通道形成和新界面的产生。这些新颖的结构在纳米级(即中尺度)内以高度可预测的空间方式在天然胶原蛋白凝胶中形成,并提供了重要的制备支架的新方法(例如管子和开放螺旋形),可用于组织再生,例如在周围神经和小血管中。本文测试了通过掺入渗透活性(天然)大分子透明质酸来控制致密胶原网络中局部液体含量的可能性。这是一种典型的生理性渗透溶胀剂。透明质酸通常由结缔组织深处的细胞分泌,因此在平衡大块组织胶原的机械压实的细胞驱动系统中,透明质酸是一个很好的候选者。这些构建体可能具有潜在的功能性体外模型,代表发育和病理过程。

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