Electrochemical DNA biosensors for label-free breast cancer gene marker detection

  • Mehmet SenelEmail author
  • Muamer Dervisevic
  • Firdevs Kokkokoğlu
Research Paper


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.

Graphical abstract


Electrochemical DNA biosensor Ferrocene Poly(amidoamine) Dendrimer Breast cancer 



Some of this work was performed at the former Fatih University as a part of the work presented in FK’s master thesis.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Mehmet Senel
    • 1
    Email author
  • Muamer Dervisevic
    • 2
  • Firdevs Kokkokoğlu
    • 3
  1. 1.SANKARA Brain & Biotechnology Research CenterNanoyasam Nanobiotechnology CompanyIstanbulTurkey
  2. 2.Monash Institute of Pharmaceutical SciencesMonash UniversityParkvilleAustralia
  3. 3.KrakówPoland

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