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Mulet-Lazaro, Roger; van Herk, Stanley; Nuetzel, Margit; Sijs-Szabo, Aniko; Díaz, Noelia; Kelly, Katherine; Erpelinck-Verschueren, Claudia; Schwarzfischer-Pfeilschifter, Lucia; Stanewsky, Hanna; Ackermann, Ute; Glatz, Dagmar; Raithel, Johanna; Fischer, Alexander; Pohl, Sandra; Rijneveld, Anita; Vaquerizas, Juan M; Thiede, Christian; Plass, Christoph; Wouters, Bas J; Delwel, Ruud; Rehli, Michael; Gebhard, Claudia
Nature communications, 07/2024, Letnik: 15, Številka: 1Journal Article
Abstract Leukemias with ambiguous lineage comprise several loosely defined entities, often without a clear mechanistic basis. Here, we extensively profile the epigenome and transcriptome of a subgroup of such leukemias with CpG Island Methylator Phenotype. These leukemias exhibit comparable hybrid myeloid/lymphoid epigenetic landscapes, yet heterogeneous genetic alterations, suggesting they are defined by their shared epigenetic profile rather than common genetic lesions. Gene expression enrichment reveals similarity with early T-cell precursor acute lymphoblastic leukemia and a lymphoid progenitor cell of origin. In line with this, integration of differential DNA methylation and gene expression shows widespread silencing of myeloid transcription factors. Moreover, binding sites for hematopoietic transcription factors, including CEBPA, SPI1 and LEF1, are uniquely inaccessible in these leukemias. Hypermethylation also results in loss of CTCF binding, accompanied by changes in chromatin interactions involving key transcription factors. In conclusion, epigenetic dysregulation, and not genetic lesions, explains the mixed phenotype of this group of leukemias with ambiguous lineage. The data collected here constitute a useful and comprehensive epigenomic reference for subsequent studies of acute myeloid leukemias, T-cell acute lymphoblastic leukemias and mixed-phenotype leukemias.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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