Journal
SMALL
Volume 16, Issue 15, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201902838
Keywords
engineered vascularized tissues; hydrogels; microfluidics; organ-on-a-chip; perfusable microchannels
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Funding
- National Natural Science Foundation of China [81872835]
- Ministry of Science and Technology [2017YFC1700802, 18-163-12-ZT-003-077-01]
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Vascular systems are responsible for various physiological and pathological processes related to all organs in vivo, and the survival of engineered tissues for enough nutrient supply in vitro. Thus, biomimetic vascularization is highly needed for constructing both a biomimetic organ model and a reliable engineered tissue. However, many challenges remain in constructing vascularized tissues, requiring the combination of suitable biomaterials and engineering techniques. In this review, the advantages of hydrogels on building engineered vascularized tissues are discussed and recent engineering techniques for building perfusable microchannels in hydrogels are summarized, including micromolding, 3D printing, and microfluidic spinning. Furthermore, the applications of these perfusable hydrogels in manufacturing organ-on-a-chip devices and transplantable engineered tissues are highlighted. Finally, current challenges in recapitulating the complexity of native vascular systems are discussed and future development of vascularized tissues is prospected.
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