A ratiometric electrochemical biosensor based on ARGET ATRP for detection of HER2 gene
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View abstract on PubMed
Summary
This summary is machine-generated.A novel ratiometric electrochemical biosensor detects human epidermal growth factor receptor 2 (HER2) using AGET ATRP and hairpin DNA. This method offers sensitive and selective HER2 detection for early breast cancer diagnosis.
Area Of Science
- Biomedical Engineering
- Oncology
- Analytical Chemistry
Background
- Human epidermal growth factor receptor 2 (HER2) is a proto-oncogene frequently overexpressed in breast cancer.
- Accurate HER2 detection is crucial for early diagnosis and personalized treatment strategies.
Purpose Of The Study
- To develop a ratiometric electrochemical biosensor for sensitive and selective HER2 detection.
- To utilize activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) and hairpin DNA for signal amplification.
Main Methods
- Self-assembly of hairpin DNA on a gold electrode via Au-S bonds.
- HER2 capture triggers hairpin unfolding, altering methylene blue (MB) signal proximity to the electrode.
- cDNA linked to HER2 introduces an amino group for initiator attachment and AGET ATRP activation.
Main Results
- The biosensor demonstrated a wide detection range (1–1 × 10^6 pM) and a low detection limit (78.47 fM).
- The ratiometric approach and dual signal system provided good selectivity, stability, and anti-interference capabilities.
- The developed biosensor shows promise for detecting other DNA-based disease markers.
Conclusions
- A novel ratiometric electrochemical biosensor was successfully developed for HER2 detection.
- The biosensor offers a sensitive, selective, and stable platform for HER2 quantification.
- This technology holds potential for early breast cancer diagnosis and broader applications in disease marker detection.
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