DNAzyme self-assembled gold nanoparticles for determination of metal ions using fluorescence anisotropy assay.
Gold nanoparticles can be exploited to facilitate a highly sensitive and selective metal ion detection based on fluorescence anisotropy assay with metal ion-dependent DNA-cleaving DNAzyme. This assay allows rapid and accurate determination of metal ions in aqueous medium at room temperature. The method has been demonstrated for determination of Cu(2+) and Pb(2+) ions. The detection sensitivity can be significantly improved to 1 nM by using a "nanoparticle enhancement" approach. Moreover, the assay was also tested in 384-well plates for high-throughput routine determination of toxic metal ions in environmental samples. The method showed distinct advantages over conventional methods in terms of its potential sensitivity, specificity, and ability for rapid response.
Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Bin-Cheng
BC
Yin
Peng
P
Zuo
Hao
H
Huo
Xinhua
X
Zhong
Bang-Ce
BC
Ye
D021881:DNA, Catalytic / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis / Q000737:chemistry*; D005454:Fluorescence Polarization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008670:Metals / Q000032:analysis / Q000737:chemistry*; D013696:Temperature
D021881:DNA, Catalytic; D004785:Environmental Pollutants; D008670:Metals; D006046:Gold