Epigenetic landscape of mixed phenotype leukemias
Leukemias with ambiguous lineage comprise a number of loosely defined entities, often without a clear mechanistic basis. Here, we investigated a group of such leukemias with a CpG Island Methylator Phenotype (CIMP), previously identified as CEBPA-silenced AML. Transcriptomics and epigenomics analyses revealed a hybrid myeloid/lymphoid epigenetic landscape, whereas genetic alterations were heterogenous. This suggests that CIMP leukemias are defined by their shared epigenetic profile rather than a common genetic lesion. Gene expression enrichment showed strong similarity with ETP-ALL and an early lymphoid progenitor cell of origin. Accordingly, integration of differential methylation and expression revealed widespread silencing of myeloid transcription factors (TFs), among which CEBPA was key for differentiation arrest. Hypermethylation also resulted in loss of CTCF binding, accompanied by a few changes in chromatin interactions involving critical TFs like KLF4. In conclusion, epigenetic dysregulation, and not genetic lesions, explain the mixed phenotype of a group of CIMP leukemias resembling ETP-ALL.
- Type: Other
- Archiver: European Genome-Phenome Archive (EGA)
Click on a Dataset ID in the table below to learn more, and to find out who to contact about access to these data
Dataset ID | Description | Technology | Samples |
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EGAD00001011050 | Illumina NovaSeq 6000 | 4 | |
EGAD00001011051 | Illumina NovaSeq 6000 | 3 | |
EGAD00001011052 | Illumina HiSeq 2500 | 36 | |
EGAD00001011053 | Illumina NovaSeq 6000 | 1 | |
EGAD00001011054 | Illumina NovaSeq 6000 | 81 | |
EGAD00001011059 | Illumina NovaSeq 6000 | - | |
EGAD00001011060 | Illumina HiSeq 2500 | 3 | |
EGAD00001015358 | Illumina NovaSeq 6000 | 1 |
Publications | Citations |
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Epigenetic alterations affecting hematopoietic regulatory networks as drivers of mixed myeloid/lymphoid leukemia.
Nat Commun 15: 2024 5693 |
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