Advantages and Limitations of SNP Array in the Molecular Characterization of Pediatric T-Cell Acute Lymphoblastic Leukemia.

Autor:	Lejman M; Laboratory of Genetic Diagnostics, Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, Lublin, Poland., Włodarczyk M; Laboratory of Genetic Diagnostics, University Children's Hospital, Lublin, Poland., Styka B; Laboratory of Genetic Diagnostics, University Children's Hospital, Lublin, Poland., Pastorczak A; Department of Pediatric, Oncology, Hematology and Diabetology, Medical University of Łódz, Łódź, Poland., Zawitkowska J; Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, Lublin, Poland., Taha J; Department of Pediatric, Oncology, Hematology and Diabetology, Medical University of Łódz, Łódź, Poland., Sędek Ł; Department of Microbiology and Oncology, Medical University of Silesia in Katowice, Katowice, Poland., Skonieczka K; Department of Clinical Genetics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland., Braun M; Department of Pathology, Chair of Oncology, Medical University of Łódz, Łódź, Poland., Haus O; Department of Clinical Genetics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland., Szczepański T; Department of Microbiology and Oncology, Medical University of Silesia in Katowice, Katowice, Poland., Młynarski W; Department of Pediatric, Oncology, Hematology and Diabetology, Medical University of Łódz, Łódź, Poland., Kowalczyk JR; Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, Lublin, Poland.
Jazyk:	angličtina
Zdroj:	Frontiers in oncology [Front Oncol] 2020 Jul 17; Vol. 10, pp. 1184. Date of Electronic Publication: 2020 Jul 17 (Print Publication: 2020).
DOI:	10.3389/fonc.2020.01184
Abstrakt:	T-cell acute lymphoblastic leukemia (T-ALL) is a highly heterogeneous disease, and numerous genetic aberrations in the leukemic genome are responsible for the biological and clinical differences among particular ALL subtypes. However, there is limited knowledge regarding the association of whole-genome copy number abnormalities (CNAs) in childhood T-ALL with the course of leukemia and its outcome. The aim of this study was to identify the pattern of whole-genome CNAs in 86 newly diagnosed childhood T-ALL cases using a high-density single-nucleotide polymorphism array. We analyzed the presence of whole-genome CNAs with respect to immunophenotype, clinical features, and treatment outcomes. A total of 769 CNAs, including trisomies, duplications, deletions, and segmental loss of heterozygosity, were detected in 86 analyzed samples. Gain or loss of chromosomal regions exceeding 10 Mb occurred in 46 cases (53%), including six cases (7%) with complex chromosomal alterations. We observed that microdeletions in selected genes (e.g., FIP1L1 and PDGFRB ) were related to the clinical features. Interestingly, 13% of samples have a duplication of the two loci ( MYB and AIH1- 6q23.3), which never occurred alone. Single-nucleotide polymorphism array significantly improved the molecular characterization of pediatric T-ALL. Further studies with larger cohorts of patients may contribute to the selection of prognostic CNAs in this group of patients. (Copyright © 2020 Lejman, Włodarczyk, Styka, Pastorczak, Zawitkowska, Taha, Sędek, Skonieczka, Braun, Haus, Szczepański, Młynarski and Kowalczyk.)
Databáze:	MEDLINE
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