脐静脉
管腔(解剖学)
细胞生物学
干细胞
血管生成
组织工程
解剖
人脐静脉内皮细胞
内皮干细胞
材料科学
生物医学工程
生物物理学
化学
生物
体外
医学
生物化学
癌症研究
作者
Peter Wu,Bradley R. Ringeisen
出处
期刊:Biofabrication
[IOP Publishing]
日期:2010-03-01
卷期号:2 (1): 014111-014111
被引量:158
标识
DOI:10.1088/1758-5082/2/1/014111
摘要
Angiogenesis is one of the prerequisite steps for viable tissue formation. The ability to influence the direction and structure in the formation of a vascular system is crucial in engineering tissue. Using biological laser printing (BioLP), we fabricated branch/stem structures of human umbilical vein endothelial cells (HUVEC) and human umbilical vein smooth muscle cells (HUVSMC). The structure is simple as to mimic vascular networks in natural tissue but also allow cells to develop new, finer structures away from the stem and branches. Additionally, we printed co-culture structures by first depositing only HUVECs, followed by 24 h incubation to allow for adequate cell–cell communication and differentiation into lumina; these cell printed scaffold layers were then removed from incubation and inserted into the BioLP apparatus so that HUVSMCs could be directly deposited on top and around the previously printed HUVEC structures. The growth and differentiation of these co-culture structures was then compared to the growth of printed samples with either HUVECs or HUVSMCs alone. Lumen formation was found to closely mimic the original branch and stem structure. The beginning of a network structure is observed. HUVSMCs acted to limit HUVEC over-growth and migration when compared to printed HUVEC structures alone. HUVSMCs and HUVECS, when printed in close contact, appear to form cell–cell junctions around lumen-like structures. They demonstrate a symbiotic relationship which affects their development of phenotype when in close proximity of each other. Our results indicate that it is possible to direct the formation and growth of lumen and lumen network using BioLP.
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