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Design Of A Novel Bioreactor And Application In Vascular Tissue Engineering

机译:一种新型生物反应器的设计及其在血管组织工程中的应用

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Endothelial cells (ECs) detachment under high shear stress at the early period of transplantation resulted in thrombosis and occlusion. To solve this problem, we developed a novel bioreactor. The bioreactor mimicked the formation of pulsatile flow in physiological conditions. Human umbilical vein ECs were seeded onto the lumen of living tissue conduits grown within dog peritoneal cavity. The shear stress generated by the bioreactor was increased step by step from 1.5 ± 0.8 dyn/cm~2 to 5.3 ± 2.4 dyn/cm~2, and was applied to ECs after static culture for 2 days. The results showed that completely confluent monolayer ECs were elongated, and were oriented parallel to the flow direction. The bioreactor could provide good environment for formation of endothelium. Stepwise increase shear stress could strengthen cell-cell and cell-extracellular matrix. The flow conditions of the bioreactor play a key role to determine the quality of the ECs lining.
机译:移植初期在高剪切应力作用下内皮细胞(ECs)脱离导致血栓形成和闭塞。为了解决这个问题,我们开发了一种新型的生物反应器。该生物反应器模仿了生理条件下脉动流的形成。将人脐静脉ECs接种到在犬腹膜腔内生长的活组织导管的内腔中。由生物反应器产生的剪切应力从1.5±0.8 dyn / cm〜2逐步增加到5.3±2.4 dyn / cm〜2,并在静态培养2天后施加到EC上。结果表明,完全汇合的单层EC被拉长,并平行于流向定向。该生物反应器可以为内皮的形成提供良好的环境。逐步增加剪切应力可以增强细胞-细胞和细胞-细胞外基质。生物反应器的流动条件对于确定EC衬里的质量起着关键作用。

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