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Issue 5, 2004
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Molded polyethylene glycol microstructures for capturing cells within microfluidic channels

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The ability to control the deposition and location of adherent and non-adherent cells within microfluidic devices is beneficial for the development of micro-scale bioanalytical tools and high-throughput screening systems. Here, we introduce a simple technique to fabricate poly(ethylene glycol) (PEG) microstructures within microfluidic channels that can be used to dock cells within pre-defined locations. Microstructures of various shapes were used to capture and shear-protect cells despite medium flow in the channel. Using this approach, PEG microwells were fabricated either with exposed or non-exposed substrates. Proteins and cells adhered within microwells with exposed substrates, while non-exposed substrates prevented protein and cell adhesion (although the cells were captured inside the features). Furthermore, immobilized cells remained viable and were stained for cell surface receptors by sequential flow of antibodies and secondary fluorescent probes. With its unique strengths in utility and control, this approach is potentially beneficial for the development of cell-based analytical devices and microreactors that enable the capture and real-time analysis of cells within microchannels, irrespective of cell anchorage properties.

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Publication details

The article was received on 31 Mar 2004, accepted on 21 May 2004 and first published on 26 Jul 2004

Article type: Paper
DOI: 10.1039/B404842C
Citation: Lab Chip, 2004,4, 425-430
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    Molded polyethylene glycol microstructures for capturing cells within microfluidic channels

    A. Khademhosseini, J. Yeh, S. Jon, G. Eng, K. Y. Suh, J. A. Burdick and R. Langer, Lab Chip, 2004, 4, 425
    DOI: 10.1039/B404842C

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