Direct Bioprinting of 3D Multicellular Breast Spheroids onto Endothelial Networks.

Direct Bioprinting of 3D Multicellular Breast Spheroids onto Endothelial Networks.
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DOI:
10.3791/61791
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发表时间:
2020-11-02
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
通讯作者:
Clyne AM
Clyne AM
中科院分区:
其他
文献类型:
--
作者:
Swaminathan S;Clyne AM

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生物打印正在成为一种很有前途的工具,可以制造3D人类癌症模型,更好地概括体内组织结构的关键特征。在目前的逐层挤压生物打印中,单个细胞在生物墨水中挤压,并结合复杂的空间和时间线索来促进分层组织自组装。然而,这种生物制造技术依赖于细胞、生物墨水以及生化和生物物理线索之间的复杂相互作用。因此,自组装可能需要几天甚至几周的时间,可能需要特定的生物墨水,当涉及一种以上的细胞类型时,可能并不总是发生。因此,我们开发了一种技术,可以在各种生物墨水中直接生物打印预先形成的3D乳腺上皮球体。生物打印的预先形成的3D乳腺上皮球体在打印后保持了它们的生存能力和极化结构。我们还将3D球体打印到血管内皮细胞网络上,以创建共培养模型。因此,新的生物打印技术以比传统生物打印技术更低的成本和更高的灵活性快速地创建了更具生理相关性的3D人体乳房模型。这种多功能的生物打印技术可以外推,用额外的生物墨水创建其他组织的3D模型。
Bioprinting is emerging as a promising tool to fabricate 3D human cancer models that better recapitulate critical hallmarks of in vivo tissue architecture. In current layer-by-layer extrusion bioprinting, individual cells are extruded in a bioink together with complex spatial and temporal cues to promote hierarchical tissue self-assembly. However, this biofabrication technique relies on complex interactions among cells, bioinks and biochemical and biophysical cues. Thus, self-assembly may take days or even weeks, may require specific bioinks, and may not always occur when there is more than one cell type involved. We therefore developed a technique to directly bioprint pre-formed 3D breast epithelial spheroids in a variety of bioinks. Bioprinted pre-formed 3D breast epithelial spheroids sustained their viability and polarized architecture after printing. We additionally printed the 3D spheroids onto vascular endothelial cell networks to create a co-culture model. Thus, the novel bioprinting technique rapidly creates a more physiologically relevant 3D human breast model at lower cost and with higher flexibility than traditional bioprinting techniques. This versatile bioprinting technique can be extrapolated to create 3D models of other tissues in additional bioinks.
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