Printed Paper Sensors for Serum Lactate Dehydrogenase using Pullulan-Based Inks to Immobilize Reagents

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• 作者：Balamurali Kannan ; Sana Jahanshahi-Anbuhi ; Robert H. Pelton ; Yingfu Li ; Carlos D. M Filipe ; John D. Brennan
• 刊名：Analytical Chemistry
• 出版年：2015
• 出版时间：September 15, 2015
• 年：2015
• 卷：87
• 期：18
• 页码：9288-9293
• 全文大小：312K
• ISSN：1520-6882

文摘

In this study, a paper-based point-of-care (POC) colorimetric biosensor was developed for the detection of lactate dehydrogenase in serum using a nonporous, oxygen impermeable reversibly gelling polysaccharide material based on pullulan. The pullulan could be printed onto paper surfaces along with all required assay reagents, providing a means for high-stability immobilization of all reagents on paper. Serum containing lactate dehydrogenase (LDH) was directly spotted on to the pullulan-coated bioactive paper and provided quantitative colorimetric data that was comparable to that obtained with a conventional plate-reader method. The paper strip was found to be highly stable and could be stored at 4 掳C for at least 10 weeks with no loss in performance, as compared to a complete loss in performance within 1 day when the reagents were printed without the stabilizing polysaccharide. The ease of fabrication coupled with the high stability of the printed reagents provides a facile platform for easily manufactured POC sensors.