期刊
BIOFABRICATION
卷 14, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1758-5090/ac2d78
关键词
digital-light-processing; organ-on-a-chip; microfluidics; hydrogel models
资金
- National Institutes of Health (NIH) [R21-DC18818]
This study developed a multi-material DLP-based bioprinter for rapid prototyping of hydrogel-based microfluidic chips. The optimized composite hydrogel bioink allows for a wide range of mechanical properties. The biofabrication approach offers a useful tool for integrating micro-tissue models into organs-on-chips and high-throughput drug screening platforms.
Recent advancements in digital-light-processing (DLP)-based bioprinting and hydrogel engineering have enabled novel developments in organs-on-chips. In this work, we designed and developed a multi-material, DLP-based bioprinter for rapid, one-step prototyping of hydrogel-based microfluidic chips. A composite hydrogel bioink based on poly-ethylene-glycol-diacrylate (PEGDA) and gelatin methacryloyl (GelMA) was optimized through varying the bioprinting parameters such as light exposure time, bioink composition, and layer thickness. We showed a wide range of mechanical properties of the microfluidic chips for various ratios of PEGDA:GelMA. Microfluidic features of hydrogel-based chips were then tested using dynamic flow experiments. Human-derived tumor cells were encapsulated in 3D bioprinted structures to demonstrate their bioactivity and cell-friendly environment. Cell seeding experiments then validated the efficacy of the selected bioinks for vascularized micro-tissues. Our biofabrication approach offers a useful tool for the rapid integration of micro-tissue models into organs-on-chips and high-throughput drug screening platforms.
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