Related Experiment Videos
Study on the expression of ABH antigens on platelets
K Ogasawara1, J Ueki, M Takenaka
1Japanese Red Cross Tokyo Metropolitan Blood Center.
Blood
|August 1, 1993
Summary
Platelet transfusions can be ineffective due to varying antigen expression. This study reveals that platelet antigen (A and B) expression is genetically determined, impacting transfusion success.
Area of Science:
- Immunology
- Genetics
- Hematology
Background:
- Refractoriness to HLA-matched, ABO-incompatible platelet transfusions presents a clinical challenge.
- Understanding variations in platelet antigen expression is crucial for transfusion efficacy.
Observation:
- Platelets transfused to a refractory recipient showed significantly higher B antigen expression compared to successfully transfused platelets.
- This observation prompted an investigation into the quantitative expression of A and B antigens on donor platelets.
Findings:
- Platelet donors were classified into high-expression and low-expression phenotypes for A or B antigens.
- Approximately 7% of donors exhibited high antigen expression, independent of secretor status.
- High antigen expression correlated with increased transferase activity, suggesting genetic control via glycosyltransferase genes.
- Family studies indicated a dominant inheritance pattern for the high-expression phenotype.
Implications:
- Platelet ABH antigen expression is genetically determined.
- The ABO blood group warrants careful consideration in platelet transfusion strategies.
- This genetic variability may explain transfusion refractoriness and guide future transfusion protocols.