Aspiration-assisted bioprinting for precise positioning of biologics

Bugra Ayan, Dong Nyoung Heo, Zhifeng Zhang, Madhuri Dey, Adomas Povilianskas, Corina Drapaca, Ibrahim T. Ozbolat

Research output: Contribution to journalArticle

Abstract

Three-dimensional (3D) bioprinting is an appealing approach for building tissues; however, bioprinting of mini-tissue blocks (i.e., spheroids) with precise control on their positioning in 3D space has been a major obstacle. Here, we unveil “aspiration-assisted bioprinting (AAB),” which enables picking and bioprinting biologics in 3D through harnessing the power of aspiration forces, and when coupled with microvalve bioprinting, it facilitated different biofabrication schemes including scaffold-based or scaffold-free bioprinting at an unprecedented placement precision, ~11% with respect to the spheroid size. We studied the underlying physical mechanism of AAB to understand interactions between aspirated viscoelastic spheroids and physical governing forces during aspiration and bioprinting. We bioprinted a wide range of biologics with dimensions in an order-of-magnitude range including tissue spheroids (80 to 600 μm), tissue strands (~800 μm), or single cells (electrocytes, ~400 μm), and as applications, we illustrated the patterning of angiogenic sprouting spheroids and self-assembly of osteogenic spheroids.

Original languageEnglish (US)
Article numbereaaw5111
JournalScience Advances
Volume6
Issue number10
DOIs
StatePublished - Jan 1 2020

All Science Journal Classification (ASJC) codes

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