A novel signal-amplified electrochemical aptasensor based on supersandwich G-quadruplex DNAzyme for highly sensitive cancer cell detection
Clicks: 296
ID: 43053
2015
A novel electrochemical biosensor for cancer cell detection was developed based on aptamer-based competition and supersandwich G-quadruplex DNAzyme amplification strategy. Due to the stronger affinity between the aptamer and cancer cells than that with its complementary oligonucleotide, the complementary oligonucleotide will be facilely replaced. As a consequence, we can detect cancer cells indirectly by detecting the releasing DNA which is proportional to the concentration of K562 cells. Through the supersandwich G-quadruplex DNAzyme amplification strategy, the sensitivity can be dramatically enhanced with detection limit down to 14 cells. Keywords: Signal-amplified, Supersandwich, G-quadruplex DNAzyme, Cancer cell
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lu2015aelectrochemistry
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Authors | Lu, Cai-Yu;Xu, Jing-Juan;Wang, Zong-Hua;Chen, Hong-Yuan; |
Journal | electrochemistry communications |
Year | 2015 |
DOI | DOI not found |
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