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DNA-Fueled Molecule Machine-Mediated Atom Transfer Radical Polymerization Amplification for 17β-Estradiol Assay in
Baoting Dou1, Keming Wang1, Qianyu Wang1
1School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.
Analytical Chemistry
|March 2, 2026
Summary
This study presents a novel electrochemical sensor for sensitive 17β-estradiol (E2) detection. The DNA-fueled molecular machine enables accurate E2 monitoring in clinical samples, aiding pregnancy outcome prediction.
Area of Science:
- Biomedical Engineering
- Analytical Chemistry
- Molecular Biology
Background:
- 17β-Estradiol (E2) is vital for female reproductive health.
- Detecting low E2 concentrations in bodily fluids remains challenging.
Purpose of the Study:
- To develop a highly sensitive electrochemical sensor for E2 detection.
- To enable accurate E2 monitoring in clinical samples.
Main Methods:
- Utilized a DNA-fueled molecular machine for amplification.
- Employed atom transfer radical polymerization (ATRP) for signal enhancement.
- Integrated toehold-mediated strand displacement and click chemistry.
Main Results:
- Achieved a low detection limit of 35 fM for E2.
- Demonstrated a wide linear range from 100 fM to 80 nM.
- Validated sensor performance in clinical serum samples across pregnancy stages.
Conclusions:
- The developed sensor offers high sensitivity and specificity for E2 detection.
- It accurately quantifies E2 in complex clinical matrices.
- This technology holds potential for predicting pregnancy outcomes and assessing endocrine function.
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