Journal
NANO LETTERS
Volume 4, Issue 9, Pages 1683-1687Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0491428
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DNAzyme-functionalized Au-NPs act as catalytic labels for the amplified detection of DNA and telomerase activity on nucleic acid-functionalized gold surface. The DNAzyme stimulates, in the presence of hemin, H2O2, and luminol, the generation of chemiluminescence. For DNA analysis, a nucleic acid unit complementary to the analyzed DNA is tethered to the DNAzyme structure associated with the Au-NPs. For telomerase activity, a nucleic acid complementary to the telomer repeat units generated on the surface is tethered to the DNAzyme structure associated with the Au-NPs. The detection limit for the detection of DNA is 1 x 10(-10) M. The method enables the detection of telomerase activity originating from 1000 HeLa cells.
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