A Dual Immunosensor Based on Optical Weak Value Amplification for Simultaneous Detection of CA125 and HE4

Area of Science:

• Biomedical Engineering
• Biosensing Technology
• Cancer Biomarkers

Background:

• Simultaneous detection of multiple biomarkers is crucial for effective cancer screening.
• Combined detection of CA125 and HE4 is highly efficient for ovarian cancer diagnosis.
• Existing methods may lack the required precision and specificity for early detection.

Purpose of the Study:

• To develop a novel dual immunosensor for simultaneous detection of ovarian cancer biomarkers CA125 and HE4.
• To leverage weak value amplification (WVA) for enhanced sensitivity and accuracy.
• To provide a new tool for early cancer screening and clinical diagnosis.

Main Methods:

• Fabrication of a dual immunosensor using self-assembled monolayer technique.
• Utilization of recombinant protein G for antibody enrichment and directional capture.
• Implementation of weak value amplification (WVA) for signal enhancement.

Main Results:

• Achieved high-precision, simultaneous detection of CA125 and HE4.
• Established low detection limits: 5.39 U/mL for CA125 and 1.79 ng/mL for HE4.
• Demonstrated excellent specificity, distinguishing target analytes from non-target molecules.

Conclusions:

• The developed WVA-based dual immunosensor offers a novel and effective approach for ovarian cancer detection.
• This technology shows significant potential for improving early cancer screening and clinical diagnosis.
• The sensor's high precision and specificity make it a promising tool for biomarker analysis.