Abstract
We present an electrochemical DNA detection strategy based on self-assembled ferrocene-cored poly(amidoamine) dendrimers for the detection of a gene relevant to breast cancer. The chemisorption of three ferrocene-cored poly(amidoamine) generations and hybridization of single-stranded DNA on a Au electrode were studied by cyclic voltammetry and differential pulse voltammetry. The biosensor demonstrated high sensitivity of 0.13 μA/(ng/ml) in the detection of the target DNA with a linear range of 1.3–20 nM and a detection limit of 0.38 nM. The DNA biosensor also has high selectivity for the target DNA, showing a clear signal difference from a noncomplementary sequence and a single-base-mismatch sequence, which was used as a model of BRAC1 gene mutation. The results shown are highly motivating for exploring DNA biosensing technology in the diagnosis of breast cancer caused by mutation of the BRAC1 gene.
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Some of this work was performed at the former Fatih University as a part of the work presented in FK’s master thesis.
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Senel, M., Dervisevic, M. & Kokkokoğlu, F. Electrochemical DNA biosensors for label-free breast cancer gene marker detection. Anal Bioanal Chem 411, 2925–2935 (2019). https://doi.org/10.1007/s00216-019-01739-9
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DOI: https://doi.org/10.1007/s00216-019-01739-9