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Development of microfluidic devices incorporating non-spherical hydrogel microparticles for protein-based bioassay

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Abstract

This paper describes the fabrication of a microfluidic device for use in protein-based bioassays that effectively incorporates poly(ethylene glycol) (PEG) hydrogel microparticles within a defined region. The microfluidic device is composed of a polymerization chamber and reaction chamber that are serially connected through the microchannel. Various shapes and sizes of hydrogel microparticles were fabricated in the polymerization chamber by photopatterning and moved to the reaction chamber by pressure-driven flow. All of the hydrogel microparticles were retained within the reaction chamber due to an in-chamber integrated microfilter with smaller mesh size than hydrogel microparticles. Hydrogel microparticles were able to encapsulate enzymes without losing their activity, and different concentrations of glucose were detected by sequential bienzymatic reaction of hydrogel-entrapped glucose oxidase (GOX) and peroxidase (POD) inside the microfluidic device using fluorescence method. Importantly, there was a linear correspondence between fluorescence intensity and the glucose concentration over the physiologically important range of 1.00–10.00 mM.

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Acknowledgments

This work was supported by Korea Science and Engineering Foundation (KOSEF) funded by MEST (R11-2007-050-03002-0) and grants from Seoul Research and Business Development Program (10816).

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Authors and Affiliations

  1. Department of Chemical Engineering, Yonsei University, 134 Sinchon-Dong, Seodaemoon-Gu, Seoul, 120-749, Republic of Korea

    Dongkil Choi, Eunji Jang, Jinwon Park & Won-Gun Koh

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  1. Dongkil Choi
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  2. Eunji Jang
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  3. Jinwon Park
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  4. Won-Gun Koh
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Corresponding author

Correspondence to Won-Gun Koh.

Additional information

D. Choi and E. Jang contributed equally to this work.

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Choi, D., Jang, E., Park, J. et al. Development of microfluidic devices incorporating non-spherical hydrogel microparticles for protein-based bioassay. Microfluid Nanofluid 5, 703–710 (2008). https://doi.org/10.1007/s10404-008-0303-7

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  • DOI: https://doi.org/10.1007/s10404-008-0303-7

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