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    Fabrication of centimeter-sized 3D constructs with patterned endothelial cells through assembly of cell-laden microbeads as a potential bone graft

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    Author
    Yang, G.
    Mahadik, B.
    Choi, J.Y.
    Yu, J.R.
    Mollot, T.
    Jiang, B.
    He, X.
    Fisher, J.P.
    Date
    2020-12-01
    Journal
    Acta Biomaterialia
    Publisher
    Acta Materialia Inc
    Type
    Article
    
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    Show full item record
    See at
    https://doi.org/10.1016/j.actbio.2020.11.040
    Abstract
    Modular tissue engineering is a promising biofabrication strategy to create engineered bone grafts in a bottom-up manner, in which cell-laden micro-modules are prepared as basic building blocks to assemble macroscopic tissues via different integrating mechanisms. In this study, we prepared collagen microbeads loaded with human bone marrow derived mesenchymal stem cells (BMSCs) using a microfluidic approach. The cell-laden microbeads were characterized for size change, cell activity, osteogenesis, as well as their self-assembly properties to generate centimeter-sized constructs. Moreover, using the cell-laden beads as a supporting medium, induced pluripotent stem cell-derived endothelial cells (iPSC-EC) were patterned inside bead aggregates through extrusion-based 3D printing. This fabrication approach that combines modular tissue engineering and supports 3D printing has the potential to create 3D engineered bone grafts with a pre-existing, customized vasculature. Copyright 2020
    Sponsors
    This work was supported by the National Institute of Biomedical Imaging and Bioengineering/National Institutes of Health (NIBIB/NIH) Center for Engineering Complex Tissues (P41 EB023833).
    Keyword
    3D printing
    Bone tissue engineering
    Induced pluripotent stem cell
    Mesenchymal stem cell
    Modular tissue engineering
    Identifier to cite or link to this item
    http://hdl.handle.net/10713/15299
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.actbio.2020.11.040
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