Open AccessGenetic Instability and Intratumoral Heterogeneity in Neuroblastoma with MYCN Amplification Plus 11q Deletion
Author(s) -
Eva Villamón,
Ana P. Berbegall,
Marta Piqueras,
Irene Tadeo,
Victoria Castel,
Anna Djos,
Tommy Martinsson,
Samuel Navarro,
Rosa Noguera
Publication year - 2013
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0053740
Subject(s) - neuroblastoma , multiplex ligation dependent probe amplification , biology , genetic heterogeneity , multiplex , cancer research , multiplex polymerase chain reaction , gene duplication , genetic analysis , genetics , microbiology and biotechnology , polymerase chain reaction , gene , phenotype , cell culture , exon
Background/Aim Genetic analysis in neuroblastoma has identified the profound influence of MYCN amplification and 11q deletion in patients’ prognosis. These two features of high-risk neuroblastoma usually occur as mutually exclusive genetic markers, although in rare cases both are present in the same tumor. The purpose of this study was to characterize the genetic profile of these uncommon neuroblastomas harboring both these high-risk features. Methods We selected 18 neuroblastomas with MNA plus 11q loss detected by FISH. Chromosomal aberrations were analyzed using Multiplex Ligation-dependent Probe Amplification and Single Nucleotide Polymorphism array techniques. Results and Conclusion This group of tumors has approximately the same high frequency of aberrations as found earlier for 11q deleted tumors. In some cases, DNA instability generates genetic heterogeneity, and must be taken into account in routine genetic diagnosis.