Multiplexed volumetric bar-chart chip for point-of-care diagnostics

Yujun Song, Yuanqing Zhang, Paul E. Bernard, James M. Reuben, Naoto T. Ueno, Ralph B. Arlinghaus, Youli Zu and Lidong Qin ()
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Yujun Song: The Methodist Hospital Research Institute
Yuanqing Zhang: The Methodist Hospital Research Institute
Paul E. Bernard: The Methodist Hospital Research Institute
James M. Reuben: Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center
Naoto T. Ueno: Morgan Welch Inflammatory Breast Cancer Research Program and Clinic, The University of Texas MD Anderson Cancer Center
Ralph B. Arlinghaus: The University of Texas MD Anderson Cancer Center
Youli Zu: The Methodist Hospital
Lidong Qin: The Methodist Hospital Research Institute

Nature Communications, 2012, vol. 3, issue 1, 1-9

Abstract: Abstract Microfluidics have become an enabling technology for point-of-care and personalized diagnostics. Desirable capabilities of microfluidics-based diagnostic devices include simplicity, portability, low cost and the performance of multiplexed and quantitative measurements, ideally in a high-throughput format. Here we present the multiplexed volumetric bar-chart chip (V-Chip), which integrates all these capabilities in one device. A key feature of the V-Chip is that quantitative results are displayed as bar charts directly on the device—without the need for optical instruments or any data processing or plotting steps. This is achieved by directly linking oxygen production by catalase, which is proportional to the concentration of the analyte, with the displacement of ink along channels on the device. We demonstrate the rapid quantification of protein biomarkers in diverse clinical samples with the V-Chip. The development of the V-Chip thus opens up the possibility of greatly simplified point-of-care and personalized diagnostics.

Date: 2012
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DOI: 10.1038/ncomms2292

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