Article (Scientific journals)
Immunoglobulin Heavy Chain High-Throughput Sequencing in Pediatric B-Precursor Acute Lymphoblastic Leukemia: Is the Clonality of the Disease at Diagnosis Related to Its Prognosis?
Levy, Gabriel; Kicinski, Michal; Van der Straeten, Jona et al.
2022In Frontiers in Pediatrics, 10, p. 874771
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Keywords :
BCP-ALL; clonal evolution analysis; high-throughput sequencing (HTS); minimal residual disease (MRD); prognostic factors; Pediatrics, Perinatology and Child Health
Abstract :
[en] High-throughput sequencing (HTS) of the immunoglobulin heavy chain (IgH) locus is a recent very efficient technique to monitor minimal residual disease of B-cell precursor acute lymphoblastic leukemia (BCP-ALL). It also reveals the sequences of clonal rearrangements, therefore, the multiclonal structure, of BCP-ALL. In this study, we performed IgH HTS on the diagnostic bone marrow of 105 children treated between 2004 and 2008 in Belgium for BCP-ALL in the European Organization for Research and Treatment of Cancer (EORTC)-58951 clinical trial. Patients were included irrespectively of their outcome. We described the patterns of clonal complexity at diagnosis and investigated its association with patients' characteristics. Two indicators of clonal complexity were used, namely, the number of foster clones, described as clones with similar D-N2-J rearrangements but other V-rearrangement and N1-joining, and the maximum across all foster clones of the number of evolved clones from one foster clone. The maximum number of evolved clones was significantly higher in patients with t(12;21)/ETV6:RUNX1. A lower number of foster clones was associated with a higher risk group after prephase and t(12;21)/ETV6:RUNX1 genetic type. This study observes that clonal complexity as accessed by IgH HTS is linked to prognostic factors in childhood BCP-ALL, suggesting that it may be a useful diagnostic tool for BCP-ALL status and prognosis.
Disciplines :
Pediatrics
Hematology
Oncology
Author, co-author :
Levy, Gabriel;  de Duve Institute, Université Catholique de Louvain, Brussels, Belgium ; Ludwig Institute for Cancer Research, Brussels, Belgium ; Department of Pediatric Oncology and Hematology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
Kicinski, Michal;  European Organization for Research and Treatment of Cancer (EORTC) Headquarters, Brussels, Belgium
Van der Straeten, Jona;  Molecular Hematology Laboratory, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Brussels, Belgium
Uyttebroeck, Anne;  Department of Pediatric Hemato-Oncology, UZ Leuven, Leuven, Belgium
Ferster, Alina;  Department of Pediatric Hematology-Oncology, Children's University Hospital Queen Fabiola, Université Libre de Bruxelles (ULB), Brussels, Belgium
De Moerloose, Barbara;  Department of Pediatric Hematology-Oncology and Stem Cell Transplantation, Ghent University Hospital, Ghent, Belgium
Dresse, Marie-Françoise ;  Centre Hospitalier Universitaire de Liège - CHU > > Service de pédiatrie ; Department of Pediatrics, Centre Hospitalier Régional (CHR) de la Citadelle, Liège, Belgium
Chantrain, Christophe;  Division of Pediatric Hematology-Oncology, Centre Hospitalier Chrétien (CHC) MontLégia, Liège, Belgium
Brichard, Bénédicte;  Department of Pediatric Oncology and Hematology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium
Bakkus, Marleen;  Molecular Hematology Laboratory, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Brussels, Belgium
Language :
English
Title :
Immunoglobulin Heavy Chain High-Throughput Sequencing in Pediatric B-Precursor Acute Lymphoblastic Leukemia: Is the Clonality of the Disease at Diagnosis Related to Its Prognosis?
Publication date :
May 2022
Journal title :
Frontiers in Pediatrics
eISSN :
2296-2360
Publisher :
Frontiers Media S.A., Switzerland
Volume :
10
Pages :
874771
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
This study was supported by a donation from the La Fondation contre le Cancer from Belgium and from Kom op tegen Kanker (Stand Up to Cancer) and the Flemish cancer society from Belgium. MB was supported by the Kinderkankerfonds (Belgium) and Télévie grant 28597737 (Belgium).
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since 20 October 2022

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