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Lookup NU author(s): Lisa Jones,
Professor Christine Harrison FRCPath FMedSci,
Dr Lisa Russell
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Primary established genetic abnormalities in B-cell precursor acute lymphoblastic leukemia include high hyperdiploidy (51-65 chromosomes), the translocations t(12;21)(p13;q22)/ETV6-RUNX1 fusion and t(9;22)(q34;q11)/BCR-ABL1 fusion, MLL rearrangements and intrachromosomal amplification of chromosome 21. These rearrangements are of prognostic and therapeutic relevance and are usually mutually exclusive. We identified 28 patients at diagnosis with both a primary genetic rearrangement and an immunoglobulin heavy chain locus translocation using chromosomal analysis and fluorescence in situ hybridization. Among these patients, the immunoglobulin heavy chain locus translocation partner gene was identified in six (CRLF2, CEBPA, CEBPB, TRA/D@, IGF2BP1 and IGK@). Clonal architecture was investigated in 17 patients using multiple color interphase fluorescence in situ hybridization analysis, which showed that the translocation was acquired as a secondary abnormality in ten patients, in four patients the etiology was undetermined and in three patients it was observed in a separate clone from the primary chromosomal rearrangement. These findings demonstrate the co-existence of immunoglobulin heavy chain locus translocations with other primary chromosomal rearrangements either in the same or separate clones, which may have prognostic significance in B-cell precursor acute lymphoblastic leukemia.
Author(s): Jeffries SJ, Jones L, Harrison CJ, Russell LJ
Publication type: Article
Publication status: Published
Print publication date: 01/08/2014
Acceptance date: 30/04/2014
Date deposited: 18/11/2014
ISSN (print): 0390-6078
ISSN (electronic): 1592-8721
Publisher: Fondazione Ferrata Storti
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