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The interplay between RNA sequestration in P-bodies and chromatin architecture sustains myeloid leukemia [CUT&RUN]

ABSTRACT: The interplay between RNA sequestration in P-bodies and chromatin architecture sustains myeloid leukemia [CUT&RUN]

PROVIDER: PRJNA1086193 | ENA |

REPOSITORIES: ENA

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The interplay between RNA sequestration in P-bodies and chromatin architecture sustains myeloid leukemia

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RNA sequestration in P-bodies sustains myeloid leukaemia

Project description:Post-transcriptional mechanisms are fundamental safeguards of progenitor cell identity and are often dysregulated in cancer. Here, we identified regulators of P-bodies as crucial vulnerabilities in acute myeloid leukaemia (AML) through genome-wide CRISPR screens in normal and malignant haematopoietic progenitors. We found that leukaemia cells harbour aberrantly elevated numbers of P-bodies and show that P-body assembly is crucial for initiation and maintenance of AML. Notably, P-body loss had little effect upon homoeostatic haematopoiesis but impacted regenerative haematopoiesis. Molecular characterization of P-bodies purified from human AML cells unveiled their critical role in sequestering messenger RNAs encoding potent tumour suppressors from the translational machinery. P-body dissolution promoted translation of these mRNAs, which in turn rewired gene expression and chromatin architecture in leukaemia cells. Collectively, our findings highlight the contrasting and unique roles of RNA sequestration in P-bodies during tissue homoeostasis and oncogenesis. These insights open potential avenues for understanding myeloid leukaemia and potential therapeutic interventions.

2024-08-08 | GSE260919 | GEO

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