Genetics and transcriptomes of pediatric B cell precursor leukemia with gain of chromosome 21

Study ID Alternative Stable ID Type
EGAS00001003760 Other

Study Description

Down syndrome (DS, constitutive trisomy 21) children have a 27-fold increased risk of developing B-ALL (DS-ALL), face a worse outcome due to treatment-related morbidities, and an increased rate of relapses compared to other children. This highlights the need to better understand the mechanisms of DS-associated leukemogenesis to develop more adapted treatment. In this study, we characterized the genetic and transcriptomic landscapes of DS-ALL and found a high incidence of somatic mutations leading to RAS/MAPK pathway activation in DS-ALL, as seen in other pediatric B-ALL presenting somatic gains of the chromosome 21 (B-ALL+21).

Study Datasets 2 datasets.

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Dataset ID Description Technology Samples
Whole Exome Sequencing for a cohort of 20 B-ALL samples : 5 Down syndrome (DS), 7 Hyperdiploid (HeH), 3 iAMP21 and 5 others.
Illumina HiSeq 2000 40
RNA-sequencing for a cohort of B-ALL samples : 5 Down Syndrome (DS), 16 Hyperdiploid (HeH), 6 iAMP21, 9 other. RNA-sequencing for B-cell progenitors from 3 healthy. It also contains RNA-sequencing datasets of Patient-Derived Xenografts (X) developed from the B-ALL samples : 4 Down Syndrome (DS), 4 Hyperdiploid (HeH), 1 iAMP21, 3 other.
Illumina HiSeq 2000 51

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