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Related Experiment Video

Updated: Oct 11, 2025

Validated Immunochemical Assay for Comprehensive Determination of the Human Epidermal Growth Factor Receptor 2 Released from and Bound to Cells
08:28

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DNA-Generated Electric Current Biosensor for Epidermal Growth Factor Receptor 2 (HER2) Analysis.

Xiaoqing Li1, Congcong Shen1, Minghui Yang2

  • 1College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People's Republic of China.

Methods in Molecular Biology (Clifton, N.J.)
|November 27, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel electrochemical biosensor using DNA as a signal probe for detecting human epidermal growth factor receptor 2 (HER2). This method enables quantitative analysis of HER2 in serum, crucial for breast cancer diagnosis.

Keywords:
DNAElectrochemical biosensorHuman epidermal growth factor receptor 2Square wave voltammetry (SWV)Tumor marker

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Molecular Biology

Background:

  • Electrochemical biosensors are vital for detecting human serum biomarkers in clinical settings.
  • Deoxyribonucleic acid (DNA) offers unique properties for molecular electronics, generating redox currents.
  • Human epidermal growth factor receptor 2 (HER2) is a critical biomarker for breast cancer diagnosis.

Purpose of the Study:

  • To develop a novel electrochemical biosensor for sensitive and quantitative detection of HER2.
  • To leverage DNA's redox properties for signal amplification in biosensing.
  • To establish a method for analyzing HER2 concentration in human serum for clinical applications.

Main Methods:

  • Constructed an electrochemical biosensor utilizing DNA as a signal probe.
  • Modified the DNA phosphate backbone with molybdate to create a redox-active molybdophosphate precipitate.
  • Generated electrochemical current from the DNA-molybdate complex for HER2 detection.

Main Results:

  • Demonstrated that DNA can generate redox currents for electrochemical detection.
  • Established a linear relationship between peak current and HER2 concentration within a specific range.
  • Successfully achieved quantitative analysis of HER2 in human serum samples.

Conclusions:

  • The developed DNA-based electrochemical biosensor provides a sensitive method for HER2 detection.
  • This approach utilizes DNA's molecular electronic properties for signal amplification.
  • The biosensor shows potential for clinical application in breast cancer diagnostics.