Electrochemical immunosensor based on hyperbranched structure for carcinoembryonic antigen detection

Area of Science:

• Electrochemistry
• Materials Science
• Biomedical Engineering

Background:

• Sensitive determination of carcinoembryonic antigen (CEA) is crucial for clinical research and diagnosis.
• Traditional methods for CEA detection may lack the required sensitivity or specificity.
• Hyperbranched structures offer unique properties for biosensor development.

Purpose of the Study:

• To design and synthesize a novel immunosensor for sensitive CEA detection.
• To utilize a hyperbranched polyester structure for enhanced biosensing performance.
• To evaluate the analytical performance of the developed immunosensor.

Main Methods:

• Grafting hyperbranched polyester onto an indium tin oxides glass (ITO) electrode.
• Characterization of the modified electrode using ATR-FTIR, XPS, and AFM.
• Immobilization of CEA and HRP-labeled antibody-conjugated AuNPs (HRP-Ab2-AuNPs) bioconjugates.
• Optimization of electrode conditions and electrochemical analysis.

Main Results:

• The hyperbranched polyester grafting was successfully confirmed by spectroscopic and microscopic techniques.
• The developed immunosensor demonstrated high sensitivity and selectivity for CEA.
• Achieved a linear detection range from 0.01 to 80 ng/mL with a low detection limit of 2.36 pg/mL.

Conclusions:

• The hyperbranched structure-based immunosensor provides a highly sensitive platform for CEA detection.
• This immunoassay system shows significant potential for ultrasensitive electrochemical biosensing of various analytes.
• The developed method offers a promising tool for clinical diagnostics and research.