alexa Fabrication and characterization of microfluidic liver-on-a-chip using microsomal enzymes.
Engineering

Engineering

International Journal of Advancements in Technology

Author(s): Lee J, Kim SH, Kim YC, Choi I, Sung JH

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Abstract Biotransformation in the liver plays an important role in determining the pharmacokinetic profile of drugs and food components. Current in vitro platforms for testing the liver metabolism suffers from the lack of resemblance to the human liver metabolism, mainly due to the lost metabolic activity of cultured hepatocytes and the absence of transport phenomena that occurs in the liver tissue. Here we report a microfluidic device with liver microsome encapsulated in 3-D hydrogel matrix, which can mimic the metabolism reaction and the transport phenomena in the liver. Photopolymerization of poly(ethylene glycol) diacrylate (PEG-DA) allows controlling the mass transfer with matrix sizes, and a gravity-induced passive flow can reproduce the blood flow through the liver. We measured the reaction kinetics of P450 enzymes in the device, and simulated the convection-diffusion-reaction characteristics inside the device with a mathematical model. Combination of mathematical analytical tool and the experimental tool allowed us to analyze and optimize the reaction kinetics inside the microfluidic chip. This novel in vitro platform can serve as a tool for screening the liver metabolism of various compounds. Copyright © 2013 Elsevier Inc. All rights reserved. This article was published in Enzyme Microb Technol and referenced in International Journal of Advancements in Technology

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