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- W4288885956 abstract "Mucin 1(MUC1) is an effective marker of breast cancer, so it is of great significance to develop a simple, sensitive and highly selective MUC1 detection sensor. Herein, we constructed a label-free nanopore biosensor for rapid and highly sensitive detection of MUC1. The presence of MUC1 triggered the modification of the DNAzyme walking chain on the surface of Fe 3 O 4 nanoparticles and separation from the aptamer. In the presence of Zn 2+ , DNAzyme catalyzed hydrolytic cleavage of the hairpin substrate at the scissile rA. The DNAzyme was divided into two fragments and ssDNA was released. ssDNA products from the hairpin substrate can generate a current blocking signal during α-hemolysin nanopore testing. The frequency of signature events showed a linear response toward the concentration of MUC1 in the range of 0.01 nM–100 nM. The sensing system also exhibited high selectivity against other protein and can be used for the detection of real sample. • MUC1-aptamer and DNAzyme hybridization reaction was used as sensing platform. • 3D DNA walker nanoprobe was used for both MUC1 recognition and signal amplification. • MUC1 was detected indirectly by cutting the DNA fragments. • The α-HL nanopore biosensor could be utilized in real sample analysis." @default.
- W4288885956 created "2022-07-31" @default.
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- W4288885956 date "2022-08-01" @default.
- W4288885956 modified "2023-09-23" @default.
- W4288885956 title "Highly sensitive α-hemolysin nanopore detection of MUC1 based on 3D DNA walker" @default.
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- W4288885956 doi "https://doi.org/10.1016/j.aca.2022.340193" @default.
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