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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.
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页码:530 / 537
页数:8
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