Journal
ADVANCED HEALTHCARE MATERIALS
Volume 8, Issue 13, Pages -Publisher
WILEY
DOI: 10.1002/adhm.201900435
Keywords
blood-vessel-on-a-chip; cell-laden; helical microfibers; microfluidics
Funding
- National Key R&D Program of China [2016YFC1100203]
- National Natural Science Foundation of China [31530024, 81672213, 31872748]
- Jiangsu Provincial Special Program of Medical Science [BL2012004]
- China Postdoctoral Science Foundation [2016M590500, 2017T100398]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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Nature has created many perfect helical microstructures, including DNA, collagen fibrils, and helical blood vessels, to achieve unique physiological functions. While previous studies have developed a number of microfabrication strategies, the preparation of complex helical structures and cell-laden helical structures for biomimetic applications remains challenging. In this study, a one-step microfluidics-based methodology is presented for preparing complex helical hydrogel microfibers and cell-laden helical hydrogel microfibers. Several types of complex helical structures, including multilayer helical microfibers and superhelical hollow microfibers with helical channels, are prepared by simply tuning the flow rates or modifying the geometry of microfluidic device. With the decent perfusability, the hollow microfibers may simulate the structural characteristics of helical blood vessels and create swirling blood flow in a blood-vessel-on-chip setup. Such hydrogel-based helical microstructures may potentially be used in areas such as blood vessel tissue engineering, organ-on-chips, drug screening, and biological actuators.
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