Abstract:
BACKGROUND:Delayed hemolysis mediated by long-term production of pre-existing recipient-derived antibodies directed against donor RBC antigens after allogenic BMT is an unusual complication of hematopoietic transplantation. CASE REPORT:A 26-year-old man with aplastic anemia had pre-existing alloantibodies to E and c. He received BMT from a donor, whose Rh phenotype was E+, c+. From about 1 month after the transplant, he showed mild hemolysis due to the antibodies. RESULTS:The patient was typed as group B, CCDee and had anti-E and c alloantibodies before BMT. The donor was typed as group O, ccDEE. Although MNCs from the donor marrow were infused into the patient, DAT became positive on Day 21, and the patient-origin antibodies remained detectable by both DAT and IAT even 20 months after BMT. However, immunomagnetically isolated peripheral circulating B cells were 100 percent donor origin. The patient received prednisolone from Day 221, and thereafter, the signs of hemolysis disappeared. CONCLUSION:It is likely that the long-term production of alloantibodies is due to the existence of long-lived recipient plasma cells, which survive the conditioning regimen. This case suggests that patients with pre- existing alloantibodies that do not belong to the ABO system should be carefully followed up after BMT.
journal_name
Transfusionjournal_title
Transfusionauthors
Izumi N,Fuse I,Furukawa T,Uesugi Y,Tsuchiyama J,Toba K,Togashi K,Yamada K,Ohtake S,Saitoh Y,Yanagisawa N,Aizawa Ydoi
10.1046/j.1537-2995.2003.00303.xsubject
Has Abstractpub_date
2003-02-01 00:00:00pages
241-5issue
2eissn
0041-1132issn
1537-2995pii
trf303journal_volume
43pub_type
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