Mapping Genotypes to Chromatin Accessibility Profiles in Single Cells

In somatic tissue differentiation, chromatin accessibility changes govern priming and precursor commitment towards cellular fates1–3. Therefore, somatic mutations likely alter chromatin accessibility patterns, as they disrupt differentiation topologies leading to abnormal clonal outgrowth. However, defining the impact of somatic mutations on the epigenome in human samples is challenging due to admixed mutated and wild-type cells. To chart how somatic mutations disrupt epigenetic landscapes in human clonal outgrowths, we developed Genotyping of Targeted loci with single-cell Chromatin Accessibility (GoT-ChA). This high-throughput platform links genotypes to chromatin accessibility at single-cell resolution, across thousands of cells within a single assay. We applied GoT-ChA to CD34+ cells from myeloproliferative neoplasm (MPN) patients with JAK2V617F-mutated hematopoiesis.

Type: Epigenetics
Archiver: European Genome-Phenome Archive (EGA)

1 Dataset

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Dataset ID	Description	Technology	Samples
EGAD50000000234	To explore how JAK2V617F disrupts cell-fate and the regulatory chromatin landscape of HSCs, we applied GoT-ChA to CD34+ sorted progenitor cells from 21 human primary samples, comprising 18 patients with JAK2V617F-mutated MF (no additional mutations, except for Pt-08), who either had no treatment (n = 12; including three longitudinal samples from a PV patient who progressed to MF) or who were treated with ruxolitinib (n = 6), a JAK1/2 inhibitor. We included a JAK2V617F CH sample (Pt-19) to explore early epigenetic changes, before the onset of overt hematological abnormality.	Illumina NovaSeq 6000	21