Thermal contrast amplification reader yielding 8⇑fold analytical improvement for disease detection with lateral flow assays

Yiru Wang, Zhenpeng Qin, David R. Boulware, Bobbi S. Pritt, Lynne M. Sloan, Iveth J. Gonzalez, David Bell, Roxanne R. Rees-Channer, Peter Chiodini, Warren C.W. Chan, John C. Bischof

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Abstract

There is an increasing need for highly sensitive and quantitative diagnostics at the point-of-care. The lateral flow immunoassay (LFA) is one of the most widely used point-of-care diagnostic tests; however, LFAs generally suffer from low sensitivity and lack of quantification. To overcome these limitations, thermal contrast amplification (TCA) is a new method that is based on the laser excitation of gold nanoparticles (GNPs), the most commonly used visual signature, to evoke a thermal signature. To facilitate the clinical translation of the TCA technology, we present the development of a TCA reader, a platform technology that significantly improves the limit of detection and provides quantification of disease antigens in LFAs. This TCA reader provides enhanced sensitivity over visual detection by the human eye or by a colorimetric reader (e.g., BD Veritor System Reader). More specifically, the TCA reader demonstrated up to an 8-fold enhanced analytical sensitivity and quantification among LFAs for influenza, malaria, and Clostridium difficile. Systematic characterization of the laser, infrared camera, and other components of the reader and their integration into a working reader instrument are described. The development of the TCA reader enables simple, highly sensitive quantification of LFAs at the point-of-care.

Original languageEnglish (US)
Pages (from-to)11774-11782
Number of pages9
JournalAnalytical Chemistry
Volume88
Issue number23
DOIs
StatePublished - Jan 1 2016

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ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Wang, Y., Qin, Z., Boulware, D. R., Pritt, B. S., Sloan, L. M., Gonzalez, I. J., Bell, D., Rees-Channer, R. R., Chiodini, P., Chan, W. C. W., & Bischof, J. C. (2016). Thermal contrast amplification reader yielding 8⇑fold analytical improvement for disease detection with lateral flow assays. Analytical Chemistry, 88(23), 11774-11782. https://doi.org/10.1021/acs.analchem.6b03406