Abstract:
BACKGROUND:Thymoglobulin given before allo-hematopoietic stem-cell transplantation (HSCT) from unrelated donors reduces acute graft-versus-host disease (GvHD), but the optimal dose is unknown. METHOD:Four different doses of Thymoglobulin were given to 162 patients with hematologic malignancies undergoing unrelated donor HSCT: 4, 6, 8, and 10 mg/kg. Stem-cell source was bone marrow in 102 cases and peripheral blood stem cells in 60. Conditioning was cyclophosphamide combined with total-body irradiation or busulfan. GvHD prophylaxis was cyclosporine and methotrexate. RESULTS:The lowest dose of Thymoglobulin significantly increased the risk for acute GvHD II or greater (odds ratio [OR] 2.67, P=0.015) and III or greater (OR 4.12, P=0.03). GvHD-associated deaths were more common in the lowest Thymoglobulin dose (6/51) compared with higher doses (2/111), P<0.01. No difference in bacteremia and cytomegalovirus reactivation was found. A trend for more infectious death (11/55 vs. 11/107, P=0.09) was found in the 10 mg/kg group compared with lower doses. Median dose of Thymoglobulin (6-8 mg/kg) was associated with lower transplant-related mortality (TRM) (hazard ratio [HR] 0.35, P=0.03) and better survival (HR 0.45, P=0.027) in multivariate analysis, whereas no effect on relapse and relapse-free survival was found. CONCLUSION:Low-dose (4 mg/kg) of Thymoglobulin increased the risk for severe acute GvHD, whereas 10 mg/kg increased the risk for infectious death. Median doses (6-8 mg/kg) of Thymoglobulin resulted in the lowest TRM and best survival.
journal_name
Transplantationjournal_title
Transplantationauthors
Remberger M,Svahn BM,Mattsson J,Ringdén Osubject
Has Abstractpub_date
2004-07-15 00:00:00pages
122-7issue
1eissn
0041-1337issn
1534-6080pii
00007890-200407150-00021journal_volume
78pub_type
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