Abstract
The diagnosis of dengue infection is still a critical factor determining success in the clinical management and treatment of patients. Here, the development of microfluidic paper-based analytical devices (μPADs) utilizing a sandwich immunoassay on wax patterned paper functionalized with anti-dengue NS1 monoclonal antibodies for point-of-care detection of dengue NS1 (DEN-NS1-PAD) is reported. Various assay conditions, including the length of the channel and diluent, were optimized, and the response detected by the naked eye and digitized images within 20–30 min. The DEN-NS1-PAD was successfully tested in the field for detecting dengue NS1 in buffer, cell culture media, and human serum. The limit of detection (LoD) of the DEN-NS1-PAD obtained with the naked eye, scanner, and a smartphone camera was 200, 46.7, and 74.8 ng mL−1, respectively. The repeatability, reproducibility, and stability of the DEN-NS1-PAD were also evaluated. High true specificity and sensitivity in the serum of pediatric patients were observed. These evaluation results confirm that the DEN-NS1-PAD can potentially be used in point-of-care dengue diagnostics, which can significantly impact on the spreading of mosquito-borne diseases, which are likely to become more prevalent with the effects of global warming.
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Acknowledgements
M.H.P. gratefully acknowledges the scholarship research fund from Universitas Islam Indonesia (UII). The authors also acknowledge the financial support provided by King Mongkut’s University of Technology Thonburi through the KMUTT 55th Anniversary Commemorative Fund.
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Ethical approval was obtained by the Ethics Committee of the Faculty of Tropical Medicine, Mahidol University, Thailand (MUTM 2019–030-01). We have complied with all relevant ethical regulations in carrying out this study.
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Prabowo, M.H., Chatchen, S., Rijiravanich, P. et al. Dengue NS1 detection in pediatric serum using microfluidic paper-based analytical devices. Anal Bioanal Chem 412, 2915–2925 (2020). https://doi.org/10.1007/s00216-020-02527-6
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DOI: https://doi.org/10.1007/s00216-020-02527-6