期刊
ANALYTICAL CHEMISTRY
卷 90, 期 22, 页码 13373-13377出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.8b03052
关键词
-
资金
- National Natural Science Foundation of China [21375153]
Early diagnosis of HIV biomarkers or genes is the key to reducing acquired immunodeficiency syndrome (AIDS) mortality. In our work, we developed a novel polymerase chain reaction dynamic light scattering (PCR-DLS) assay for one-step sensitive detection of HIV DNA based on the average diameter change of gold nanoparticles (AuNPs). This is the first PCR assay that makes use of the DLS technique as a signal read-out, with the particle size measured by DLS increasing with the concentration of target DNA. With the help of the AuNP probes, this PCR-DLS assay can effectively improve the specificity of PCR reactions, which can greatly increase the detection sensitivity, with a detection limit of 1.8 aM (S/N = 3). In addition, the proposed strategy was successfully used to analyze target DNA in human serum samples, indicating that the PCR-DLS assay has a promising potential application for rapid and early clinical diagnosis of HIV infection.
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