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Analytical chemistry v.89 no.2, 2017년, pp.1163 - 1169   SCI SCIE
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Simultaneous Detection of Dual Nucleic Acids Using a SERS-Based Lateral Flow Assay Biosensor

Wang, Xiaokun (Department of Bionano Engineering, Hanyang University, Ansan 426-791, ); Choi, Namhyun (Department of Bionano Engineering, Hanyang University, Ansan 426-791, ); Cheng, Ziyi (Department of Bionano Engineering, Hanyang University, Ansan 426-791, ); Ko, Juhui (Department of Bionano Engineering, Hanyang University, Ansan 426-791, ); Chen, Lingxin (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, ); Choo, Jaebum (Department of Bionano Engineering, Hanyang University, Ansan 426-791, );
  • 초록  

    A new class of surface-enhanced Raman scattering (SERS)-based lateral flow assay (LFA) biosensor has been developed for the simultaneous detection of dual DNA markers. The LFA strip in this sensor was composed of two test lines and one control line. SERS nano tags labeled with detection DNA probes were used for quantitative evaluation of dual DNA markers with high sensitivity. Target DNA, associated with Kaposis sarcoma-associated herpesvirus (KSHV) and bacillary angiomatosis (BA), were tested to validate the detection capability of this SERS-based LFA strip. Characteristic peak intensities of SERS nano tags on two test lines were used for quantitative evaluations of KSHV and BA. The limits of detection for KSHV and BA, determined from our SERS-based LFA sensing platform, were estimated to be 0.043 and 0.074 pM, respectively. These values indicate approximately 10000 times higher sensitivity than previously reported values using the aggregation-based colorimetric method. We believe that this is the first report of simultaneous detection of two different DNA mixtures using a SERS-based LFA platform. This novel detection technique is also a promising multiplex DNA sensing platform for early disease diagnosis.


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