title: Cascaded multiple amplification strategy for ultrasensitive detection of HIV/HCV virus DNA.
abstract: Ultrasensitive detection of HIV and HCV virus DNA is of great importance for early accurate diagnostics and therapy of HIV virus-infected patients. Herein, to our best knowledge, it is the first to use DNA cascaded multiple amplification strategy for ultrasensitive detection of HIV virus DNA with G-quadruplex-specific fluorescent or colorimetric probes as signal carriers. The developed strategy also exhibited universal applicability for HCV virus DNA detection. After reaction for about 4h, high sensitivity and specificity can be achieved at both fluorescent and colorimetric strategies (limit of detection (LOD) of 10 fM and 0.5pM were reached for fluorescent and colorimetric detection, respectively). And the single-based mismatched DNA even can be distinguished by naked eyes. It is believed that the cascaded multiple amplification strategy presents a huge advance in sensing platform and potential application in future clinical diagnosis.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China; Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, PR China.
authors.forename: Kun
authors.initials: K
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Daoqing
authors.initials: D
authors.lastname: Fan
authors.affiliation: Key Laboratory of Food Nutrition and Safety (Ministry of Education), Tianjin University of Science and Technology, Tianjin 300457, PR China. Electronic address: yaqingliu@tust.edu.cn.
authors.forename: Yaqing
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China. Electronic address: dongsji@ciac.ac.cn.
authors.forename: Shaojun
authors.initials: S
authors.lastname: Dong
mesh_terms: D015374:Biosensing Techniques; D003124:Colorimetry / Q000379:methods*; D004279:DNA, Viral / Q000032:analysis*; D054856:G-Quadruplexes; D006678:HIV / Q000302:isolation & purification*; D015658:HIV Infections / Q000097:blood* / Q000175:diagnosis / Q000821:virology; D016174:Hepacivirus / Q000302:isolation & purification*; D006526:Hepatitis C / Q000097:blood* / Q000175:diagnosis / Q000821:virology; D006801:Humans; D057230:Limit of Detection; D021141:Nucleic Acid Amplification Techniques / Q000379:methods; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D004279:DNA, Viral
keywords: Colorimetric; DNA machine; Fluorescence; Multiple amplification