Selective Detection of Erythrocytes with QCMs-ABO Blood Group Typing

Area of Science:

• Biomedical Engineering
• Materials Science
• Immunology

Background:

• Accurate blood group (BG) typing and crossmatching are essential for safe blood transfusions and organ transplantation.
• Landsteiner's ABO classification, based on erythrocyte surface antigens, is the most critical blood group system.
• Current methods require precise identification of these antigens for compatibility.

Purpose of the Study:

• To develop a novel mass-sensitive sensor for blood group typing using molecular imprinting technology.
• To create a selective coating capable of distinguishing between different ABO blood groups.
• To establish a reliable and unambiguous method for blood typing.

Main Methods:

• Fabrication of a quartz crystal microbalance (QCM) sensor with molecularly imprinted polymer (MIP) and non-imprinted polymer (NIP) resonators.
• Utilizing polyvinylpyrrolidone imprinted with erythrocytes of different blood groups as the selective coating.
• Evaluating sensor responses to various blood groups using mass-sensitive measurements and atomic force microscopy (AFM) for imprint structure analysis.

Main Results:

• The developed sensor successfully distinguished between different ABO blood groups based on unique response patterns.
• Atomic force microscopy revealed a donut-like structure of the erythrocyte imprints.
• Responses correlated with the presence and number of A and B antigens on erythrocytes, with blood group O showing a consistent response due to the absence of these antigens.

Conclusions:

• Molecular imprinting technology provides a viable strategy for creating selective coatings for blood group typing.
• The QCM sensor demonstrates unambiguous characterization of ABO blood groups through molecular recognition.
• This approach offers a promising new tool for pre-transfusion testing and diagnostics.