Abstract
Allogeneic bone marrow transplantation (BMT) is an effective therapy for a variety of malignancies and blood disorders, but rarely serves as a frontline treatment because of numerous, potential complications. Important and frequent complications relate to the profound immunosuppression that inevitably occurs during the first several months following treatment. To better elucidate and subsequently improve immune reconstitution, we examined T and B cell subsets among 43 pediatric BMT recipients in a retrospective study. We found that the relative numbers of T cells and B cells (T:B ratios) were discordant and highly variable among patients at day ∼100 after BMT. Further investigation of BMT parameters identified a strong correlation between T:B ratios and immunosuppressive drug treatments, providing an explanation for variable lymphocyte reconstitution profiles. Results suggest that: (1) immunosuppressive therapy inhibits B cell expansion more strongly than T cell expansion following BMT; (2) WBC and absolute lymphocyte counts fail to reveal profound B cell immunodeficiencies in some BMT patients; and (3) routine analyses of T:B ratios serve to identify patients warranting close follow-up and extended supportive immunotherapy. Bone Marrow Transplantation (2001) 28, 573–580.
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Acknowledgements
This work was funded in part by grants from the National Institutes of Health, National Cancer Institute: P30-CA21765 and RO1-CA57419, The Assisi Foundation, and the American Lebanese Syrian Associated Charities. We thank our clinical colleagues Drs Malcolm K Brenner, Robert Krance and Helen E Heslop for helping care for patients and initiating lymphocyte analyses. We thank Xin Tong of the Biostatistics and Epidemiology Department of St Jude Children's Research Hospital for assistance with statistical calculations.
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D'Costa, S., Slobod, K., Benaim, E. et al. Effect of extended immunosuppressive drug treatment on B cell vs T cell reconstitution in pediatric bone marrow transplant recipients. Bone Marrow Transplant 28, 573–580 (2001). https://doi.org/10.1038/sj.bmt.1703185
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DOI: https://doi.org/10.1038/sj.bmt.1703185