Journal
CANCER RESEARCH
Volume 65, Issue 20, Pages 9152-9154Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/0008-5472.CAN-05-2017
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Genome-wide single nucleotide polymorphism analysis has revealed large-scale cryptic regions of acquired homozygosity in the form of segmental uniparental disomy in similar to 20% of acute myeloid leukemias. We have investigated whether such regions, which are the consequence of mitotic recombination, contain homozygous mutations in genes known to be mutational targets in leukemia. In 7 of 13 cases with uniparental disomy, we identified concurrent homozygous mutations at four distinct loci (WT1, FLT3, CEBPA, and RUNX1). This implies that mutation precedes mitotic recombination which acts as a second hit responsible for removal of the remaining wildtype allele, as has recently been shown for the JAK2 gene in myeloproliferative disorders.
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