A novel high-speed production process to create modular components for the bottom-up assembly of large-scale tissue-engineered constructs

Omar F. Khan, Derek N. Voice, Brendan M. Leung, Michael V. Sefton

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

To replace damaged or diseased tissues, large tissue-engineered constructs can be prepared by assembling modular components in a bottom-up approach. However, a high-speed method is needed to produce sufficient numbers of these modules for full-sized tissue substitutes. To this end, a novel production technique is devised, combining air shearing and a plug flow reactor-style design to rapidly produce large quantities of hydrogel-based (here type I collagen) cylindrical modular components with tunable diameters and length. Using this technique, modules containing NIH 3T3 cells show greater than 95% viability while endothelial cell surface attachment and confluent monolayer formation are demonstrated. Additionally, the rapidly produced modules are used to assemble large tissue constructs (>1 cm3) in vitro. Module building blocks containing luciferase-expressing L929 cells are packed in full size adult rat-liver-shaped bioreactors and perfused with cell medium, to demonstrate the capacity to build organ-shaped constructs; bioluminescence demonstrates sustained viability over 3 d. Cardiomyocyte-embedded modules are also used to assemble electrically stimulatable contractile tissue. Using a high-speed production method based on air shearing and plug flow, small modular tissue building blocks are created and assembled into large-scale tissues. The bottom-up assembly process creates an internal network of perfusion channels through which cell culture medium is perfused. This perfusion keeps interior cells viable. Large liver-shaped and cardiac tissues are built to demonstrate this system's utility.

Original languageEnglish
Pages (from-to)113-120
Number of pages8
JournalAdvanced healthcare materials
Volume4
Issue number1
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

ASJC Scopus Subject Areas

  • Biomaterials
  • Biomedical Engineering
  • Pharmaceutical Science

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

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