Microscale Bioreactors for in situ characterization of GI epithelial cell physiology.

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TitleMicroscale Bioreactors for in situ characterization of GI epithelial cell physiology.
Publication TypeJournal Article
Year of Publication2017
AuthorsCostello, CM, Phillipsen, MB, Hartmanis, LM, Kwasnica, MA, Chen, V, Hackam, D, Chang, MW, Bentley, WE, March, JC
JournalSci Rep
Volume7
Issue1
Pagination12515
Date Published2017 Oct 02
ISSN2045-2322
Abstract

The development of in vitro artificial small intestines that realistically mimic in vivo systems will enable vast improvement of our understanding of the human gut and its impact on human health. Synthetic in vitro models can control specific parameters, including (but not limited to) cell types, fluid flow, nutrient profiles and gaseous exchange. They are also "open" systems, enabling access to chemical and physiological information. In this work, we demonstrate the importance of gut surface topography and fluid flow dynamics which are shown to impact epithelial cell growth, proliferation and intestinal cell function. We have constructed a small intestinal bioreactor using 3-D printing and polymeric scaffolds that mimic the 3-D topography of the intestine and its fluid flow. Our results indicate that TEER measurements, which are typically high in static 2-D Transwell apparatuses, is lower in the presence of liquid sheer and 3-D topography compared to a flat scaffold and static conditions. There was also increased cell proliferation and discovered localized regions of elevated apoptosis, specifically at the tips of the villi, where there is highest sheer. Similarly, glucose was actively transported (as opposed to passive) and at higher rates under flow.

DOI10.1038/s41598-017-12984-2
Alternate JournalSci Rep
PubMed ID28970586
PubMed Central IDPMC5624909
Grant ListS10 OD018516 / OD / NIH HHS / United States