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Initial leukemic epigenomic state determines hypomethylating agent response

Hypomethylating agents (HMAs) are a mainstay of therapy for myeloid cancers, but genetic biomarkers do not predict who will respond to treatment. Using a variety of single-cell sequencing approaches to define the epigenomic state of responder and nonresponder leukemic cells, we aim to demonstrate that leukemic stem cells (LSC) exist in at least two different epigenomic states: a hematopoietic stem cell (HSC)-or multipotent progenitor (MPP)-like state that is sensitive to HMAs, independent of genetic mutations, or a lymphoid-primed MPP (LMPP)-like nonresponder state. Additionally, we aim to demonstrate that hypomethylation and chromatin accessibility at ZNF143- and CTCF-binding sites result in activation of HOXB4, which defines the HSC/MPP-like state and HMA-sensitivity. Our study aims to provide evidence that the epigenomic state of the LSC is a major determinant of response to HMAs, and demonstrates that a routine clinical assay can identify patients who will respond.

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

4 Datasets

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Dataset ID	Description	Technology	Samples
EGAD50000001374	Data and analysis of single cell whole genome bisulfite sequencing assay of Lin- CD34+ CD38- sorted live cells from bone marrow tissue of 7 patients with MDS or AML (before treatment with 5-azacytidine). Data files are paired-end reads in FASTQ format from the Illumina HiSeq 2500 and HiSeq X sequencers. Analysis files are text files generated from Novomethyl reflecting the number of methylated reads per CpG, with the following columns: chr, start, end, percent_meth, num_methylated, num_total.	Illumina HiSeq 2500 Illumina HiSeq X	7
EGAD50000001375	Data and analysis of mt-scATAC-seq assay of Lin- CD34+ sorted live cells from bone marrow tissue of 4 patients with AML (before treatment with decitabine). Data files are paired-end reads in FASTQ format from the NextSeq 2000 sequencer. Analysis files are outputs from Cellranger ATAC: .h5 peak matrix file, atac_fragments.tsv.gz file and its index.	NextSeq 2000	4
EGAD50000001376	Data and analysis of HiChIP assay of shZNF143 and shControl in OCI-AML3. CTCF was the ChIP antibody. Data files are paired-end reads in FASTQ format from the Illumina NovaSeq 6000 sequencer. Analysis files are paired-end bed files produced by FitHiChIP.	Illumina NovaSeq 6000	2
EGAD50000001377	Data and analysis of DOGMA-seq assay of Lin- sorted live cells from bone marrow tissue of 12 patients with MDS or AML (before treatment with 5-azacytidine). Data files are paired-end reads in FASTQ format from the Illumina NovaSeq 6000 sequencer. Analysis files are outputs from Cellranger ARC: .h5 peaks and genes matrix file, atac_fragments.tsv.gz file and its index. Samples with ADT assay have analysis files from kallisto, bustools, and kite: ADT_features.txt, ADT_barcodes.txt, ADT_matrix.mtx.	Illumina NovaSeq 6000	12