NUP98 is rearranged in 3.8% of pediatric AML forming a clinical and molecular homogenous group with a poor prognosis.
Fiche publication
Date publication
mars 2017
Journal
Leukemia
Auteurs
Membres identifiés du Cancéropôle Est :
Dr COLLONGE-RAME Marie-Agnès
Tous les auteurs :
Struski S, Lagarde S, Bories P, Puiseux C, Prade N, Cuccuini W, Pages MP, Bidet A, Gervais C, Lafage-Pochitaloff M, Roche-Lestienne C, Barin C, Penther D, Nadal N, Radford-Weiss I, Collonge-Rame MA, Gaillard B, Mugneret F, Lefebvre C, Bart-Delabesse E, Petit A, Leverger G, Broccardo C, Luquet I, Pasquet M, Delabesse E
Lien Pubmed
Résumé
Pediatric acute myeloid leukemia (AML) is a rare disease whose prognosis is highly variable according to factors such as chromosomal abnormalities. Recurrent genomic rearrangements are detected in half of pediatric AML by karyotype. NUcleoPorin 98 (NUP98) gene is rearranged with 31 different fusion partner genes. These rearrangements are frequently undetected by conventional cytogenetics, as the NUP98 gene is located at the end of the chromosome 11 short arm (11p15). By screening a series of 574 pediatric AML, we detected a NUP98 rearrangement in 22 cases (3.8%), a frequency similar to CBFB-MYH11 fusion gene (4.0%). The most frequent NUP98 fusion gene partner is NSD1. These cases are homogeneous regarding their biological and clinical characteristics, and associated with bad prognosis only improved by bone marrow transplantation. We detailed the biological characteristics of these AML by exome sequencing which demonstrated few recurrent mutations (FLT3 ITD, WT1, CEBPA, NBPF14, BCR and ODF1). The analysis of the clonal structure in these cases suggests that the mutation order in the NUP98-rearranged pediatric AML begins with the NUP98 rearrangement leading to epigenetic dysregulations then followed by mutations of critical hematopoietic transcription factors and finally, activation of the FLT3 signaling pathway.
Mots clés
Alleles, Biomarkers, Tumor, CCAAT-Enhancer-Binding Proteins, genetics, Child, Child, Preschool, Epigenesis, Genetic, Exome, Female, Gene Expression Regulation, Leukemic, Gene Frequency, High-Throughput Nucleotide Sequencing, Humans, In Situ Hybridization, Fluorescence, Infant, Infant, Newborn, Leukemia, Myeloid, Acute, diagnosis, Male, Mutation, Nuclear Pore Complex Proteins, genetics, Oncogene Proteins, Fusion, genetics, Prognosis, Signal Transduction, Translocation, Genetic, WT1 Proteins, genetics, fms-Like Tyrosine Kinase 3, metabolism
Référence
Leukemia. 2017 03;31(3):565-572