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A novel standalone microfluidic device for local control of oxygen tension for intestinal-bacteria interactions.
Wang, Chengyao; Dang, Thao; Baste, Jasmine; Anil Joshi, Advait; Bhushan, Abhinav.
Afiliação
  • Wang C; Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, USA.
  • Dang T; Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, USA.
  • Baste J; Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, USA.
  • Anil Joshi A; Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, USA.
  • Bhushan A; Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, IL, USA.
FASEB J ; 35(2): e21291, 2021 02.
Article em En | MEDLINE | ID: mdl-33506497
ABSTRACT
The intestinal environment is unique because it supports the intestinal epithelial cells under a normal oxygen environment and the microbiota under an anoxic environment. Due to importance of understanding the interactions between the epithelium and the microbiota, there is a strong need for developing representative and simple experimental models. Current approaches do not capture the partitioned oxygen environment, require external anaerobic chambers, or are complex. Another major limitation is that with the solutions that can mimic this oxygen environment, the oxygenation level of the epithelial cells is not known, raising the question whether the cells are hypoxic or not. We report standalone microfluidic devices that form a partitioned oxygen environment without the use of an external anaerobic chamber or oxygen scavengers to coculture intestinal epithelial and bacterial cells. By changing the thickness of the device cover, the oxygen tension in the chamber was modulated. We verified the oxygen levels using several tests microscale oxygen sensitive sensors which were integrated within the devices, immunostaining of Caco-2 cells to determine hypoxia levels, and genetically encoded bacteria to visualize the growth. Collectively, these methods monitored oxygen concentrations in the devices more comprehensively than previous reports and allowed for control of oxygen tension to match the requirements of both intestinal cells and anaerobic bacteria. Our experimental model is supported by the mathematical model that considered diffusion of oxygen into the top chamber. This allowed us to experimentally determine the oxygen consumption rate of the intestinal epithelial cells under perfusion.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxigênio / Dispositivos Lab-On-A-Chip / Mucosa Intestinal Limite: Humans Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxigênio / Dispositivos Lab-On-A-Chip / Mucosa Intestinal Limite: Humans Idioma: En Ano de publicação: 2021 Tipo de documento: Article