Comparison of outcomes of unrelated bone marrow and umbilical cord blood transplants in children with acute leukemia

Vanderson Rocha, Jacqueline Cornish, Eric L. Sievers, Alexandra Filipovich, Franco Locatelli, Cristina Peters, Mats Remberger, Gérard Michel, William Arcese, Sandro Dallorso, Karin Tiedemann, Alessandro Busca, Ka Wah Chan, Shunichi Kato, Juan Ortega, Marcus Vowels, Axel Zander, Gérard Souillet, Anthony Oakill, Ann WoolfreyAndrea L. Pay, Ann Green, Federico Gamier, Irina Ionescu, Peter Wernet, Girolamo Sirchia, Pablo Rubinstein, Sylvie Chevret, Eliane Gluckman

Research output: Contribution to journalArticlepeer-review

Abstract

In order to compare the outcomes of unrelated umbilical cord blood transplants (UCBTs) or bone marrow transplants, 541 children with acute leukemia (AL) transplanted with umbilical cord blood (n = 99), T-cell-depleted unrelated bone marrow transplants (T-UBMT) (n = 180), or nonmanipulated (UBMT) (n = 262), were analyzed in a retrospective multicenter study. Comparisons were performed after adjustment for patient, disease, and transplant variables. The major difference between the 3 groups was the higher number in the UCBT group of HLA mismatches (defined by serology for class I and molecular typing for DRB1). The donor was HLA mismatched in 92% of UCBTs, in 18% of UBMTs, and in 43% of T-UBMTs (P <.001). Other significant differences were observed in pretransplant disease characteristics, preparative regimens, graft-versus-host disease (GVHD) prophylaxis, and number of cells infused. Nonadjusted estimates of 2-year survival and event-free survival rates were 49% and 43%, respectively, in the UBMT group, 41% and 37% in the T-UBMT group, and 35% and 31% in the UCBT group. After adjustment, differences in outcomes appeared in the first 100 days after the transplantation. Compared with UBMT recipients, UCBT recipients had delayed hematopoietic recovery (Hazard ratio [HR] = 0.37; 95% confidence interval [95CI]: 0.27-0.52; P <.001), increased 100 day transplant-related mortality (HR = 2.13; 95CI: 1.20-3.76; P <.01) and decreased acute graft-versus-host disease (aGVHD) (HR = 0.50; 95CI: 0.34-0.73; P <.001). T-UBMT recipients had decreased aGVHD (HR = 0.25; 95CI: 0.170.36; P <.0001) and increased risk of relapse (HR = 1.96; 95CI: 1.11-3.45; P = .02). After day 100 posttransplant, the 3 groups achieved similar results in terms of relapse. Chronic GVHD was decreased after T-UBMT (HR = 0.21; 95CI: 0.11-0.37; P <.0001) and UCBT (HR = 0.24; 95CI: 0.01-0.66; P = .002), and overall mortality was higher in T-UBMT recipients (HR = 1.39; 95CI: 0.97-1.99; P <.07). In conclusion, the use of UCBT, as a source of hematopoietic stem cells, is a reasonable option for children with AL lacking an acceptably matched unrelated marrow donor.

Original languageEnglish
Pages (from-to)2962-2971
Number of pages10
JournalBlood
Volume97
Issue number10
DOIs
Publication statusPublished - May 15 2001

ASJC Scopus subject areas

  • Hematology

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