Recurrent somatic JAK-STAT mutations within a novel RUNX1-mutated pedigree

Study ID Alternative Stable ID Type
EGAS00001001862 Other

Study Description

The acquisition of somatic mutations is an emerging field of investigation in familial leukemia. Currently, genetic profiles in familial MDS/AML are considered analogous to sporadic disease, although the patterns of clonal evolution within families are poorly defined. We performed whole exome profiling of tumour samples from a novel RUNX1 mutated family, to determine the stepwise evolution of MDS/AML across 4 young siblings. Three siblings developed monocytic AML/RAEB2 at 5 years of age, with hepatosplenomegaly and somatic mutations upregulating JAK-STAT signalling, the latter are typically detected in <5% of sporadic MDS/AML. Two siblings acquired the canonical JAK2 V617F mutation, while another acquired a unique missense mutation of SH2B3, a negative regulator of JAK2. Notably, 2/3 siblings demonstrated dosage amplification of these mutations due to acquired uniparental disomy of chromosomes 9p and 12q (encompassing JAK2 and SH2B3, respectively). All 4 siblings were heterozygous for the 46/1 JAK2 haplotype associated with predisposition to sporadic V617F ... (Show More)

Study Datasets 1 dataset.

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Dataset ID Description Technology Samples
Whole-exome sequencing of a RUNX1-mutated pedigree, including samples from mother, father and four offsprings. Recurrent somatic JAK-STAT mutations were found among the diseased individuals.
Illumina HiSeq 2000 6

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