title: Frequency and outcome of pediatric acute lymphoblastic leukemia with ZNF384 gene rearrangements including a novel translocation resulting in an ARID1B/ZNF384 gene fusion.
abstract: ZNF384 gene rearrangements with multiple partner genes are recurrent in acute leukemia and are most often associated with a precursor B cell immunophenotype. The overall incidence of this genetic category of leukemia is uncertain.
  
  
  
  Patients with ZNF384 gene rearrangements from a cohort of 240 precursor B cell acute lymphoblastic leukemia (ALL) pediatric patients over a 3.5-year time period were characterized with detailed cytogenetic, FISH, genomic, and clinical analyses.
  
  
  
  Seven of the 240 patients were identified to have ZNF384 gene rearrangements including partner genes TCF3 (four patients), EWSR1 (one patient), EP300 (one patient), and the novel gene partner ARID1B (one patient). The translocations were confirmed by FISH analysis and with RNA sequencing for the EP300 and ARID1B partner genes. Genomic microarray analysis showed an average of 2.7 copy number alterations in each case with no evidence of imbalance at the translocation breakpoints. Six of the patients with ZNF384 gene rearrangements had precursor B cell ALL with a CD10- immunophenotype and myeloid-associated antigens. One of the patients also had myeloperoxidase expression and was diagnosed as mixed phenotype B/myeloid acute leukemia. None of the patients have relapsed with event-free survival ranging from 6 years 2 months to 9 years 2 months.
  
  
  
  This study suggests that the frequency of ZNF384 gene rearrangement in pediatric precursor B cell ALL is approximately 3%. The ARID1B gene, commonly mutated in multiple types of cancer, was identified as an additional ZNF384 gene fusion partner.
authors.affiliation: Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada. mary.shago@sickkids.ca.|Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada. mary.shago@sickkids.ca.
authors.forename: Mary
authors.initials: M
authors.lastname: Shago
authors.affiliation: Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.|Department of Pediatrics, University of Toronto, Toronto, Canada.
authors.forename: Oussama
authors.initials: O
authors.lastname: Abla
authors.affiliation: Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.|Department of Pediatrics, University of Toronto, Toronto, Canada.
authors.forename: Johann
authors.initials: J
authors.lastname: Hitzler
authors.affiliation: Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.|Department of Pediatrics, University of Toronto, Toronto, Canada.
authors.forename: Sheila
authors.initials: S
authors.lastname: Weitzman
authors.affiliation: Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada.|Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdelhaleem
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004268:DNA-Binding Proteins / Q000235:genetics*; D005260:Female; D050939:Gene Fusion; D015321:Gene Rearrangement; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000235:genetics*; D017423:Sequence Analysis, RNA; D015534:Trans-Activators / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics*; D014178:Translocation, Genetic
chemical_list: C497837:ARID1B protein, human; D004268:DNA-Binding Proteins; D015534:Trans-Activators; D014157:Transcription Factors; C498621:ZNF384 protein, human
keywords: FISH; RNA sequencing; cytogenetics; precursor B cell acute lymphoblastic leukemia