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Title: Multiplex detection platform for tumor markers and glucose in serum based on a microfluidic microparticle array
Authors: Zhu, Q.
Trau, D. 
Keywords: Gel-based microstructures
Microparticle array
Spatial encoding
Tumor markers
Issue Date: 2-Nov-2012
Citation: Zhu, Q., Trau, D. (2012-11-02). Multiplex detection platform for tumor markers and glucose in serum based on a microfluidic microparticle array. Analytica Chimica Acta 751 : 146-154. ScholarBank@NUS Repository.
Abstract: We present a multiplex detection platform based on a microfluidic microparticle array to detect proteins and glucose in serum simultaneously. Multiplex detection of proteins and glucose was performed using biofunctionalized microparticles arrayed on gel-based microstructures integrated in microfluidics. The microparticles immobilized on these microstructures showed high stability under microfluidic flow conditions. With arrays of antibody-coated microbeads, microfluidic quantitative immunoassays for two protein tumor markers, human chorionic gonadotropin (hCG) and prostate specific antigen (PSA) were performed in serum samples with detection limits bellow the cut-off values for cancer diagnosis. Parallel to the immunoassays, quantitative enzymatic assays for glucose in the physiological concentration range were performed. Multiplex detection was achieved by using a spatially encoded microarray. By patterning antibody-coated microbeads and enzyme-containing microparticles on a novel mixed structure array, we successfully demonstrated simultaneous immunoassays (binding based assay) for proteins and an enzymatic assay (reaction kinetic based assay) for glucose. Our microparticle arrays could be potentially used for the detection of multiple categories of biomolecules (proteins, small metabolites and DNA) for clinical diagnostics and other biological applications. © 2012 Elsevier B.V.
Source Title: Analytica Chimica Acta
ISSN: 00032670
DOI: 10.1016/j.aca.2012.09.007
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