A molecularly imprinted electrochemical nanobiosensor for prostate specific antigen determination

Area of Science:

• Electrochemistry
• Materials Science
• Biomedical Engineering

Background:

• Prostate Specific Antigen (PSA) is a key biomarker for prostate cancer detection.
• Existing detection methods can be time-consuming or require complex procedures.
• Development of rapid, sensitive, and cost-effective biosensors is crucial for early diagnosis.

Purpose of the Study:

• To design and fabricate a novel electrochemical nanobiosensor for simple and fast PSA detection.
• To utilize a molecularly imprinted polymer as an artificial receptor for PSA.
• To optimize sensor performance for enhanced sensitivity and specificity.

Main Methods:

• Fabrication of the nanobiosensor using electrochemical polymerization of pyrrole on a screen-printed gold electrode in the presence of PSA as a molecular template.
• Evaluation of the sensor's performance using differential pulse voltammetry with K3[Fe(CN)6]/K4[Fe(CN)6] as an electrochemical marker.
• Optimization of electropolymerization cycles and PSA binding time to maximize sensor sensitivity.

Main Results:

• The nanobiosensor demonstrated high PSA recognition capacity and a fast rebinding rate.
• The binding affinity followed the Freundlich isotherm model, indicating efficient molecular interaction.
• A low detection limit of 2.0 pg/mL was achieved, signifying high sensitivity.

Conclusions:

• The developed molecularly imprinted polymer-based electrochemical nanobiosensor provides a promising platform for sensitive and rapid PSA detection.
• This approach offers a simple and efficient method for potential prostate cancer screening.
• Further studies can explore its application in clinical settings for early disease diagnosis.