IKZF1 deletions predict relapse in uniformly treated pediatric precursor B-ALL

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Absence of Genomic Ikaros/IKZF1 Deletions in Pediatric B-Precursor Acute Lymphoblastic Leukemia.

Here we report the results of gene expression analyses using multiple probesets aimed at determining the incidence of Ikaros/IKZF1 deletions in pediatric B-precursor acute lymphoblastic leukemia (BPL). Primary leukemia cells from 122 Philadelphia chromosome (Ph)+ BPL patients and 237 Ph- BPL patients as well as normal hematopoietic cells from 74 normal non-leukemic bone marrow specimens were or...

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Recurrent deletions of IKZF1 in pediatric acute myeloid leukemia.

IKAROS family zinc finger 1/IKZF1 is a transcription factor important in lymphoid differentiation, and a known tumor suppressor in acute lymphoid leukemia. Recent studies suggest that IKZF1 is also involved in myeloid differentiation. To investigate whether IKZF1 deletions also play a role in pediatric acute myeloid leukemia, we screened a panel of pediatric acute myeloid leukemia samples for d...

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Effect of IKZF1 deletions on signal transduction pathways in Philadelphia chromosome negative pediatric B-cell precursor acute lymphoblastic leukemia (BCP-ALL)

BACKGROUND IKZF1 deletions are an unfavorable prognostic factor in children with Philadelphia chromosome positive (Ph(+)) as well as negative (Ph(-)) acute lymphoblastic leukemia (ALL). Although IKZF1 deletions occur in 10-15% of Ph(-) ALL cases, effects of IKZF1 deletions on signaling pathways in this group have not been extensively studied. Therefore, in this study we aimed to study the effec...

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CD200/BTLA deletions in pediatric precursor B-cell acute lymphoblastic leukemia treated according to the EORTC-CLG 58951 protocol.

DNA copy number analysis has been instrumental for the identification of genetic alterations in B-cell precursor acute lymphoblastic leukemia. Notably, some of these genetic defects have been associated with poor treatment outcome and might be relevant for future risk stratification. In this study, we characterized recurrent deletions of CD200 and BTLA genes, mediated by recombination-activatin...

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Incidence and biological significance of IKZF1/Ikaros gene deletions in pediatric Philadelphia chromosome negative and Philadelphia chromosome positive B-cell precursor acute lymphoblastic leukemia.

In recent years, there have been a series of contradictory reports based on studies that employed single-nucleotide polymorphism (SNP) arrays regarding the incidence and prognostic significance of IKZF1 deletions in primary leukemic cells from pediatric patients with high-risk B-cell precursor ALL (BPL). Some of the initial reports have proposed that: i) genomic IKZF1 deletions (not alternative...

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ژورنال

عنوان ژورنال: Leukemia

سال: 2010

ISSN: 0887-6924,1476-5551

DOI: 10.1038/leu.2010.87