Abstract
The importance of chimerism is that it is useful to demonstrate engraftment. It allows for early intervention which might facilitate treatment of emerging relapse in leukemia, and it may help to prevent graft rejection. The aim of this study is to evaluate mixed red cell population and red blood cell chimerism after hematopoietic stem cell transplantation to predict the final outcome of mixed chimerism which may help in deciding interventions and preventing graft rejection. This study was conducted on 22 bone marrow-transplanted patients admitted to Bone Marrow Transplantation (BMT) Unit, Nasser institute, using simple agglutination method and flow cytometery (FCM) technique. In our study, three recipients had complete chimerism after 6 month which was detected by agglutination method, and one recipient had complete chimerism after 1 year which was detected by both simple agglutination method and FCM. Two recipients had mixed-field agglutination after 30 days which was detected by agglutination method and FCM. Evaluating erythrocyte repopulation by the agglutination method is feasible, easy, and cost-effective. FCM analysis is a simple, sensitive test and an objective method, which could be used as a protocol for follow-up to detect chimerism after allogeneic BMT. However, due to the difficulty found in retrieving the patients for follow-up, we suggest the use of alternative methods for detection of chimerism as variable number of tandem repeats and XY fluorescence in situ hybridization probe.
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El Enein, A.A., Afify, R.A.A., Soliman, D.M. et al. Follow-up of the patients after bone marrow transplantation for red blood cell chimerism using flow cytometry. Comp Clin Pathol 23, 111–118 (2014). https://doi.org/10.1007/s00580-012-1580-9
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DOI: https://doi.org/10.1007/s00580-012-1580-9