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Related Experiment Video

Updated: Mar 2, 2026

Aptamer-Based Target Detection Facilitated by a 3-Stage G-Quadruplex Isothermal Exponential Amplification Reaction

Aptamer-Based Target Detection Facilitated by a 3-Stage G-Quadruplex Isothermal Exponential Amplification Reaction

Published on: October 6, 2022

Integrated signal probe based aptasensor for dual-analyte detection.

Juan Xiang¹, Xiaomei Pi¹, Xiaoqing Chen¹

¹Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, Hunan, PR China; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.

Biosensors & Bioelectronics

|May 16, 2017

Summary

This summary is machine-generated.

This study introduces an integrated signal probe (ISP) for more reliable dual-analyte detection. The novel DNA architecture improves reproducibility and accuracy in electrochemical aptasensors.

Keywords:

Aptasensor Carcinoembryonic antigen (CEA)Integrated signal probe Mucin 1 (MUC1)

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Area of Science:

Electrochemistry
Biotechnology
Molecular Diagnostics

Background:

Current multi-analyte detection methods often lack reliability, reproducibility, and stability.
Improving these parameters is crucial for practical applications in diagnostics.

Purpose of the Study:

To develop an integrated signal probe (ISP) for enhanced dual-analyte detection.
To improve the reproducibility, accuracy, and stability of electrochemical aptasensors.

Main Methods:

Designed an integrated signal probe (ISP) using two redox-labeled aptamer probes (sP1, sP2) within a single DNA architecture.
Combined ISP with gold nanoparticles (AuNPs) for signal amplification.
Utilized DNA structural switching and electrochemical monitoring of methylene blue (MB) and ferrocene (Fc) for simultaneous detection.

Main Results:

The ISP demonstrated superior reproducibility and accuracy compared to independent probes.
Prevented cross-interference between signal probes through strategic DNA structure design.
Achieved sensitive dual-analyte detection with high selectivity.

Conclusions:

The ISP-based aptasensor offers a simple, accurate, and reproducible platform for simultaneous dual-analyte detection.
This approach represents significant progress for clinical diagnostics and molecular sensing applications.