A SERS-based lateral flow assay biosensor for highly sensitive detection of HIV-1 DNA

被引:309
作者
Fu, Xiuli [1 ]
Cheng, Ziyi [1 ]
Yu, Jimin [1 ]
Choo, Priscilla [2 ]
Chen, Lingxin [3 ]
Choo, Jaebum [1 ]
机构
[1] Hanyang Univ, Dept Bionano Technol, Ansan 426791, South Korea
[2] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA
[3] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
基金
中国国家自然科学基金; 新加坡国家研究基金会;
关键词
Human immunodeficiency virus type 1 (HIV-1); Surface-enhanced Raman scattering; Gold nanoparticles; DNA; Lateral flow assay; SURFACE-ENHANCED RAMAN; DETECTION PLATFORM; VISUAL DETECTION; STRIP BIOSENSOR; IMMUNOASSAY; NANOPARTICLES; SILVER; ELISA;
D O I
10.1016/j.bios.2015.11.099
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
User-friendly lateral flow (LF) strips have been extensively used for point-of-care (POC) self-diagnostics, but they have some limitations in their detection sensitivity and quantitative analysis because they only identify the high cut-off value of a biomarker by utilizing color changes that are detected with the naked eye. To resolve these problems associated with LF strips, we developed a novel surface-enhanced Raman scattering (SERS)-based LF assay for the quantitative analysis of a specific biomarker in the low concentration range. Herein, human immunodeficiency virus type 1 (HIV-1) DNA was chosen as the specific biomarker. Raman reporter-labeled gold nanoparticles (AuNPs) were employed as SERS nano tags for targeting and detecting the HIV-1 DNA marker, as opposed to using bare AuNPs in LF strips. It was possible to quantitatively analyze HIV-1 DNA with high sensitivity by monitoring the characteristic Raman peak intensity of the DNA-conjugated AuNPs. Under optimized conditions, the detection limit of our SERS-based lateral flow assay was 0.24 pg/mL, which was at least 1000 times more sensitive compared to colorimetric or fluorescent detection methods. These results demonstrate the potential feasibility of the proposed SERS-based lateral flow assay to quantitatively detect a broad range of genetic diseases with high sensitivity. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:530 / 537
页数:8
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