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SNP array analysis of acute promyelocytic leukemia may be of prognostic relevance and identifies a potential high risk group with recurrent deletions on chromosomal subband 1q31.3
Author(s) -
Nowak Daniel,
Klaumuenzer Marion,
Hanfstein Benjamin,
Mossner Maximilian,
Nolte Florian,
Nowak Verena,
Oblaender Julia,
Hecht Anna,
Hütter Gero,
Ogawa Seishi,
Kohlmann Alexander,
Haferlach Claudia,
Schlegelberger Brigitte,
Braess Jan,
Seifarth Wolfgang,
Fabarius Alice,
Erben Philipp,
Saussele Susanne,
Müller Martin C.,
Reiter Andreas,
Buechner Thomas,
Weiss Christel,
Hofmann WolfKarsten,
Lengfelder Eva
Publication year - 2012
Publication title -
genes, chromosomes and cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.754
H-Index - 119
eISSN - 1098-2264
pISSN - 1045-2257
DOI - 10.1002/gcc.21961
Subject(s) - acute promyelocytic leukemia , snp , hazard ratio , oncology , snp array , medicine , loss of heterozygosity , leukemia , biology , single nucleotide polymorphism , genetics , allele , cancer research , genotype , gene , confidence interval , retinoic acid
To search for new copy number alterations (CNAs) in acute promyelocytic leukemia (APL), we analyzed DNA from leukemic blasts of 93 acute promyelocytic leukemia (APL) patients with Genome‐Wide SNP 6.0 arrays (SNP‐A). We identified 259 CNAs consisting of 170 heterozygous deletions, 82 amplifications, and 7 regions of copy number neutral loss of heterozygosity. One of the most common CNAs was a deletion on chromosomal subband 1q31.3 in 13 of 93 (14%) patients encompassing the coding regions for the microRNAs mir181a1/b1 . In multivariable analysis with the covariates age, white blood cell count, platelet count, and FLT3 ‐ITD/ FLT3 D835 mutations we found that after adjustment for patients' age ( P < 0.0001), patients with 2 or more CNAs detected by SNP‐A had a higher risk of death (hazard ratio = 5.942, P = 0.0015) than patients with 0 or 1 CNA. Deletions of 1q31.3 were associated with a higher number of CNAs (median 2 vs. 8, P < 0.0001) and were a strong independent prognostic factor for an increased risk of relapse (hazard ratio = 28.9, P = 0.0031). This study presents a comprehensive assessment of new CNAs as pathomechanistically relevant targets and possible prognostic factors which could refine risk stratification of APL. © 2012 Wiley Periodicals, Inc.