A Microsphere-Based Suspension Array for Blood Group Molecular Typing: An Update

Area of Science:

• Immunogenetics
• Molecular Diagnostics
• Transfusion Medicine

Background:

• Previous work established a microsphere suspension array for genotyping multiple blood group systems.
• An improved version of this assay is now presented for enhanced efficiency and accuracy.

Purpose of the Study:

• To present an improved microsphere-based assay for blood group genotyping.
• To validate the enhanced assay's performance in a large sample cohort.

Main Methods:

• Development of two multiplex polymerase chain reactions (PCR) for routine and less frequent systems.
• Hybridization of biotinylated PCR products in a single multiplex assay.
• Analysis of 2,020 samples, comparing genotypes to blood group phenotypes.

Main Results:

• The improved assay demonstrated high concordance with established serology results.
• No discrepancies were observed, except for rare null and/or weak blood group phenotypes.

Conclusions:

• The presented method enables high-throughput genotyping of hundreds of samples within hours.
• The assay offers a reliable and efficient tool for blood group genotyping with high accuracy.