期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 48, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202003777
关键词
fibroblasts; neovascularization; organ engineering; vascular engineering; vasculogenesis
类别
资金
- National Institutes of Health [EB00262, EB08396, UG3 EB017103]
- National Science Foundation Cellular Metamaterials Engineering Research Center
- Boston University Biological Design Center
- Koch Institute Support (core) Grant from the National Cancer Institute [P30-CA14051]
- NIH T32 Quantitative Biology and Physiology training grant
- American Heart Association Postdoctoral Fellowship
- National Science Foundation [1122374]
Formation of capillary blood vasculature is a critical requirement for native as well as engineered organs and can be induced in vitro by coculturing endothelial cells with fibroblasts. However, whether these fibroblasts are required only in the initial morphogenesis of endothelial cells or needed throughout is unknown, and the ability to remove these stromal cells after assembly can be useful for clinical translation. In this study, a technique termed CAMEO (Controlled Apoptosis in Multicellular Tissues for Engineered Organogenesis) is introduced, whereby fibroblasts are selectively ablated on demand, and it is utilized to probe the dispensability of fibroblasts in vascular morphogenesis. The presence of fibroblasts is shown to be necessary only during the first few days of endothelial cell morphogenesis, after which they can be ablated without significantly affecting the structural and functional features of the developed vasculature. Furthermore, the use of CAMEO to vascularize a construct containing primary human hepatocytes that improved tissue function is demonstrated. In conclusion, this study suggests that transient, initial support from fibroblasts is sufficient to drive vascular morphogenesis in engineered tissues, and this strategy of engineering-via-elimination may provide a new general approach for achieving desired functions and cell compositions in engineered organs.
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