A Digital-Analog Microfluidic Platform for Patient-Centric Multiplexed Biomarker Diagnostics of Ultralow Volume Samples - PubMed (original) (raw)

. 2016 Jan 26;10(1):1699-710.

doi: 10.1021/acsnano.5b07939. Epub 2016 Jan 12.

Affiliations

• PMID: 26741022
• DOI: 10.1021/acsnano.5b07939

A Digital-Analog Microfluidic Platform for Patient-Centric Multiplexed Biomarker Diagnostics of Ultralow Volume Samples

Francesco Piraino et al. ACS Nano. 2016.

Abstract

Microfluidic diagnostic devices have the potential to transform the practice of medicine. We engineered a multiplexed digital-analog microfluidic platform for the rapid and highly sensitive detection of 3-4 biomarkers in quadruplicate in 16 independent and isolated microfluidic unit cells requiring only a single 5 μL sample. We comprehensively characterized the platform by performing single enzyme and digital immunoassays, achieving single molecule detection and measured as low as ∼10 fM (330 fg/mL) GFP in buffer and ∼12 fM GFP in human serum. We applied our integrated digital detection mechanism to multiplexed detection of 1pM anti-Ebola IgG in human serum and were able to differentiate three common Ebola strains. To ascertain that the device can be applied in environments beyond clinical point-of-care settings, we developed a low-cost, portable hardware system to control and read out the microfluidic device and detected anti-Ebola IgG in ultralow volume whole blood samples to levels of 100 pM in a multiplexed assay format.

Keywords: ELISA; diagnostics; digital immunoassay; microarrays; microfluidics; point-of-care; single-enzyme analysis.

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