Proximity aptasensor for protein detection based on an enzyme-free amplification strategy

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Biosensors

Background:

• Accurate detection of trace proteins is crucial for disease diagnosis and monitoring.
• Existing methods for protein detection can be complex, time-consuming, and require enzyme amplification.

Purpose of the Study:

• To develop a novel electrochemical aptasensor for sensitive and selective detection of trace proteins.
• To utilize proximity binding-induced strand displacement and hybridization chain reaction for signal amplification.
• To achieve enzyme-free amplification for convenient and practical protein detection.

Main Methods:

• Fabrication of an electrochemical aptasensor.
• Utilizing proximity binding-induced strand displacement for target recognition.
• Employing hybridization chain reaction (HCR) for signal amplification.
• Electrochemical detection of the amplified signal.

Main Results:

• The developed aptasensor demonstrated high sensitivity for trace protein detection.
• The assay exhibited excellent selectivity, distinguishing target proteins from similar molecules.
• The enzyme-free amplification strategy provided significant signal enhancement.
• The method showed potential for practical application in real-world samples.

Conclusions:

• A novel and efficient electrochemical aptasensor for trace protein detection has been successfully developed.
• The combination of proximity binding-induced strand displacement and HCR offers a powerful enzyme-free amplification strategy.
• This approach provides a convenient, selective, and sensitive platform for protein analysis with potential diagnostic applications.