Abstract
A novel microfluidics-based bilayer device with a discrete parenchymal chamber modeled upon hepatic organ architecture is described. The microfluidics network was designed using computational models to provide appropriate flow behavior based on physiological data from human microvasculature. Patterned silicon wafer molds were used to generate films with the vascular-based microfluidics network design and parenchymal chamber by soft lithography. The assembled device harbors hepatocytes behind a nanoporous membrane that permits transport of metabolites and small proteins while protecting them from the effects of shear stress. The device can sustain both human hepatoma cells and primary rat hepatocytes by continuous in vitro perfusion of medium, allowing proliferation and maintaining hepatic functions such as serum protein synthesis and metabolism. The design and fabrication processes are scalable, enabling the device concept to serve as both a platform technology for drug discovery and toxicity, and for the continuing development of an improved liver-assist device.
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Support from the Center for Integration of Medicine and Innovative Technology (US Army DAMD17-02-2-0006) is gratefully acknowledged. We thank Dr. Irina Pomerantseva for critically reading of the manuscript.
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Carraro, A., Hsu, WM., Kulig, K.M. et al. In vitro analysis of a hepatic device with intrinsic microvascular-based channels. Biomed Microdevices 10, 795–805 (2008). https://doi.org/10.1007/s10544-008-9194-3
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DOI: https://doi.org/10.1007/s10544-008-9194-3