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Chapter 3 Endothelial Progenitor Cells for Tissue Engineering and Tissue Regeneration Endothelial Progenitor Cells

机译:第三章用于组织工程和组织再生的内皮祖细胞

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Vascularization of tissues is a major challenge of tissue-engineering and tissue regeneration. We hypothesize that blood-derived endothelial progenitor cells (EPCs) have the required proliferative and vasculogenic activity to create vascular networks in vivo. To test this, EPCs from human umbilical cord blood or from adult peripheral blood, and human smooth muscle cells as a source of perivascular cells, were combined in Matrigel and implanted subcutaneously into immunodeficient mice. An extensive network of human endothelial cell-lined vessels filled with red blood cells was seen after 1 week, indicating formation of functional anastomoses with the host vasculature. Quantitative analyses showed the microvessel density was significantly superior to that generated by human dermal microvascular endothelial cells but similar to that generated by human umbilical vein endothelial cells. Our findings strongly support the use of human EPCs to form vascular networks in engineered organs and tissues and for regeneration of vascular networks in vivo. In this Chapter, previous studies on strategies for creating microvascular networks, sources of endothelial cells and EPCs for cardiovascular tissue-engineering and studies using bone marrow-derived progenitors for tissue regeneration will be discussed.
机译:组织的血管化是组织工程和组织再生的主要挑战。我们假设血液来源的内皮祖细胞(EPC)具有在体内创建血管网络所需的增殖和血管生成活性。为了对此进行测试,将来自人脐带血或成年外周血的EPC和作为血管周细胞来源的人平滑肌细胞结合在Matrigel中,然后皮下植入免疫缺陷小鼠中。 1周后,可见到一个由人内皮细胞构成的血管的广泛网络,里面充满了红细胞,表明与宿主脉管系统形成了功能性吻合。定量分析表明,微血管密度显着优于人真皮微血管内皮细胞产生的密度,但与人脐静脉内皮细胞产生的密度相似。我们的发现强烈支持使用人类EPC在工程器官和组织中形成血管网络,以及在体内再生血管网络。在本章中,将讨论有关创建微血管网络,用于心血管组织工程的内皮细胞和EPC的策略的先前研究,以及使用骨髓来源的祖细胞进行组织再生的研究。

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