PMID: 8589594Dec 1, 1995Paper

Flow cytometry detection of erythrocyte antigens and antibodies. Technical aspects and new clinical applications

Infusionstherapie und Transfusionsmedizin
K FischerA Poschmann

Abstract

Although hemagglutination techniques have proved worthwhile since many years in immunohematology, they also have several disadvantages. They are manual and subjective visual methods, which make it difficult to quantitate red cell antibodies or surface antigens. Flow cytometric analysis overcomes these limitations because of its ability to analyze individual populations of cells by sensitive, reproducible, and objective methods. Washed red cells from regular blood donors and patients were analyzed natively and after treatment with enzymes (sialidase, protease) or pneumococcal polysaccharides, using monoclonal Rh antibodies, human 7s-immunoglobulin, and FITC-labeled anti-human IgG or FITC anti-T lectin. The fluorescence intensity of single red cells was determined in the Ortho Cytoron Absolute flow cytometer. We determined the optimal test conditions and normal values by investigation of 50 blood donors. The fluorescence intensity of untreated red cells proved to be constant and therefore was used to adjust the instrument. Furthermore, the data of experimental adsorptions of red cells with pneumococcal antigens, sialidase (Vibrio cholerae) and protease (papain) as well as data from patients suffering from chronic HBV infection an...Continue Reading

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