ArticleInternational journal of immunopathology and pharmacology
A new way of the Coombs test using flow cytometry-based assay to assess erythrocytes-bound IgG antibodies in the human and rabbit model.
Article in International journal of immunopathology and pharmacology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Detection of RBC-bound antibodies using flow cytometry and their correlation with HLA polymorphism.Frontiers in immunology · 2026Article
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4 authors.
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Abstract
The Coombs test is important in hematology for detecting erythrocyte-bound IgG antibodies or in serm through agglutination methods, but its sensitivity and specificity are limited. Flow cytometry provides a more precise and sensitive alternative for quantitatively assessing RBC-bound IgG antibodies. This assessment is crucial for evaluating the risk of hemolytic reactions and ensuring safe transfusions. This study aimed to explore a new method for the detection of RBC-bound IgG antibodies in rabbits following the injection of human red blood cells. Rabbits serum treated with 2-mercaptoethanol (2-ME) were serially diluted at ratios of 1:1, 1:2, 1:4, 1:8, 1:16, 1:32, 1:64, 1:128, 1:256, 1:512, 1:1024, and 1:2048. These diluted samples were then reacted with O-type red blood cells (RBCs). Serum samples from healthy individuals were used as the control group. The tubes were kept in a water bath at 37°C for 30 min incubation. After incubation, the samples were analyzed using a flow cytometry-based assay. Additionally, the traditional Coombs tube method was used and the strength of IgG antibody and agglutination was graded. The results were analyzed using a flow cytometry-based assay, and the agglutination strength was determined using the Coombs traditional tube method for RBC-bound IgG antibodies. A significant difference was found between the rabbits serum and normal control groups (p < 0.001). IgG titers increased significantly after 1 month of immunization in rabbits compared to the titers observed after 1 week. The serum Anti-D stability test showed a coefficient of variation (CV) of 7.74%, indicating good stability of the test results. In this study, we concluded that the flow cytometry-based assay for detecting RBC-bound IgG antibodies was accurate, sensitive, and had positional value in clinical laboratories and research centers.
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