Volume 24, Issue 7 e13789
ORIGINAL ARTICLE

Hematopoietic cell transplantation in pediatric patients with acute leukemias or myelodysplastic syndrome using unrelated adult or umbilical cord blood donors in Brazil

Rita de Cássia Barbosa Tavares

Corresponding Author

Rita de Cássia Barbosa Tavares

Instituto Nacional de Cancer (INCA), Rio de Janeiro, Brazil

Correspondence

Rita de Cássia Barbosa Tavares, CEMO- Centro de Transplante de Medula óssea, Instituto Nacional de Cancer (INCA), Praça Cruz Vermelha 23, 7º andar, Centro, Rio de Janeiro- RJ, CEP: 20230-130, Brazil.

Email: [email protected]

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Carmem Sales Bonfim

Carmem Sales Bonfim

Universidade Federal do Paraná, Curitiba, Brazil

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Adriana Seber

Adriana Seber

Hospital Samaritano Higienópolis, São Paulo, Brazil

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Simone Pereira Lermontov

Simone Pereira Lermontov

Instituto Nacional de Cancer (INCA), Rio de Janeiro, Brazil

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Vergílio Coulturato

Vergílio Coulturato

Hospital Amaral Carvalho, Jaú, Brazil

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Victor Gottardello Zecchin

Victor Gottardello Zecchin

Instituto de Oncologia pediátrica-GRAACC-Unifesp, São Paulo, Brazil

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Lisandro Ribeiro

Lisandro Ribeiro

Universidade Federal do Paraná, Curitiba, Brazil

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Juliana Folloni Fernandes

Juliana Folloni Fernandes

Hospital Israelita Albert Einstein, São Paulo, Brazil

Instituto da Criança - Universidade de São Paulo, São Paulo, Brazil

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Liane Esteves Daudt

Liane Esteves Daudt

Hospital das Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

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Carlos S. Grecco

Carlos S. Grecco

Hospital das Clínicas da, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil

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Luiz Guilherme Darrigo-Jr

Luiz Guilherme Darrigo-Jr

Hospital das Clínicas da, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil

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Neysimélia Villela

Neysimélia Villela

Hospital de Cancer de Barretos, São Paulo, Brazil

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Samantha Nichele

Samantha Nichele

Universidade Federal do Paraná, Curitiba, Brazil

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Roseane Gouveia

Roseane Gouveia

Hospital Samaritano Higienópolis, São Paulo, Brazil

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Luís Fernando Bouzas

Luís Fernando Bouzas

Instituto Nacional de Cancer (INCA), Rio de Janeiro, Brazil

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Nelson Hamerschlak

Nelson Hamerschlak

Hospital Israelita Albert Einstein, São Paulo, Brazil

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Afonso Celso Vigorito

Afonso Celso Vigorito

Universidade de Campinas, São Paulo, Brazil

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Paula Moreira da Silva

Paula Moreira da Silva

Hospital Amaral Carvalho, Jaú, Brazil

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Priscila de Oliveira da Silva

Priscila de Oliveira da Silva

Hospital das Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

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Cinthya Corrêa da Silva

Cinthya Corrêa da Silva

Hospital Israelita Albert Einstein, São Paulo, Brazil

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Cecília de Souza Fernandez

Cecília de Souza Fernandez

Universidade Federal Fluminense, Niterói, Brazil

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Mary Evelyn Flowers

Mary Evelyn Flowers

Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, USA

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Leonardo Javier Arcuri

Leonardo Javier Arcuri

Instituto Nacional de Cancer (INCA), Rio de Janeiro, Brazil

Hospital Israelita Albert Einstein, São Paulo, Brazil

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First published: 05 August 2020
Citations: 5

Abstract

The choice of alternative donors for HCT for patients without an HLA-matched related donor depends on several factors. We compared major HCT outcomes in 212 consecutive children transplanted at 11 centers in Brazil for acute leukemia or MDS from an HLA-matched unrelated donor (MUD, n = 95), mismatched unrelated donor (MMUD, n = 47) or unrelated umbilical cord blood (UCB, n = 70). Most had ALL (61%), bone marrow (57%) as the graft source and 95% received a MAC regimen. The 3-year OS probability were 57, 55, and 37% after HCT from MUD, MMUD, and UCB, respectively (HR 1.68, 95%CI 1.07-2.63; P = .02). In comparison with MUD, OS was similar after transplantation of a ≥ 6/8 HLA-matched or a high cell dose (>5 × 107 TNC/kg) CB unit (HR 1.41, 95%CI 0.88-2.27; P = .15). NRM was higher for UCB (HR 3.90, 95%CI 1.43-10.7; P = .01) but not for MMUD (HR 1.03, 95%CI 0.53-2.00; P > .20). Advanced disease (HR 2.05, 95%CI 1.26-3.33; P < .001) and UCB with high probability of being < 6/8 HLA-matched (HR 5.34, 95%CI 2.0-13.9; P < .001) were associated with higher mortality. Relapse and acute GVHD were similar among groups, while PGF was higher among UCB transplants (P = .002) and chronic GVHD among MMUD group (HR 2.88, 95% CI 1.05-7.88; P = .04). Our results suggest that in Brazil HCT outcomes performed with MMUD and MUD donors were comparable, while with UCB units < 6/8 HLA-matched were associated with higher NRM for children with acute leukemia or MDS.

CONFLICT OF INTEREST

The authors have no conflict of interest to declare.

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