Backside-surface imprinting as a new strategy to generate specific plastic antibody materials

Area of Science:

• Materials Science
• Biotechnology
• Analytical Chemistry

Background:

• Developing synthetic antibodies is crucial for diagnostics and therapeutics.
• Existing methods often lack specificity or require complex production.
• Novel imprinting techniques are needed for advanced biomaterial development.

Purpose of the Study:

• To present a new backside protein-surface imprinting method for creating specific synthetic antibody materials.
• To demonstrate the material's ability to detect complex biomolecules.
• To evaluate the material's performance in a biological matrix.

Main Methods:

• A backside imprinting process was employed using a carboxylated-PVC supporting film on gold.
• Template removal and cleaning with proteolytic enzymes ensured a high density of binding sites.
• Electrochemical techniques, including electrochemical impedance spectroscopy (EIS), were used for characterization and detection.
• Non-imprinted materials (NIMs) were synthesized as controls.

Main Results:

• The developed material (MAPS) demonstrated specific binding to oxidized low-density lipoprotein (oxLDL).
• The sensing layer showed no cross-reactivity with other serum proteins like myoglobin and haemoglobin.
• Linear correlation was observed between oxLDL concentration and charge transfer resistance (R_CT) via EIS.
• Successful calibration was achieved in Fetal Calf Serum (FCS) within a concentration range of 2.5–12.5 μg mL^-1.

Conclusions:

• The backside imprinting technique successfully generated a specific synthetic antibody material (MAPS).
• MAPS shows promise as a synthetic alternative to natural antibodies for clinical applications.
• The material offers a novel approach for the detection of complex biomolecules with high specificity and sensitivity.