REVIEW ARTICLE


Microfluidic Micropillar Arrays for 3D Cell Culture



Minseok S. Kim, Hyundoo Hwang, Youn-Suk Choi, Je-Kyun Park*
Department of Bio and Brain Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea


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Creative Commons License
© 2008 Kim et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Bio and Brain Engineering, KAIST, 335 Gwahangno, Yuseong-gu, Daejeon 305-701, Korea; E-mail: jekyun@kaist.ac.kr


Abstract

Cell-based assays are one of the most important steps to select huge amount of drug candidates in drug discovery. To get more credible assay results, cell culture in the form of microscale environment and three-dimension has been exploited by microfluidic hydrodynamic focusing. However, the method still needs an enhanced reliability of scaffold formation and fast cell immobilization in a microchannel. In this report, we fabricated a microfluidic micropillar arrays (MMA) platform for cell culture using a poly(dimethylsiloxane) (PDMS) replica molding process. Peptide hydrogel and Matrigel were nicely patterned along the micropillars by surface tension. In addition, a linear concentration gradient profile was presented in a stripe-shaped Matrigel matrix and the simulation result with computational fluid dynamics (CFD) solver was corresponded to the experimental profile. The MMA platform was successfully applied to the hepatocellular carcinoma cell (HepG2) culture for 2 days.

Keywords: 3D cell culture, Micropillar arr, Microfluidics, Hydrogel, Concentration gradient.