MIR retrotransposons link the epigenome and the transcriptome of coding genes in acute myeloid leukemia

Aristeidis G. Telonis, Qin Yang, Hsuan-Ting Huang and Maria E. Figueroa ()
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Aristeidis G. Telonis: University of Miami Miller School of Medicine
Qin Yang: University of Miami Miller School of Medicine
Hsuan-Ting Huang: University of Miami Miller School of Medicine
Maria E. Figueroa: University of Miami Miller School of Medicine

Nature Communications, 2022, vol. 13, issue 1, 1-14

Abstract: Abstract DNMT3A and IDH1/2 mutations combinatorically regulate the transcriptome and the epigenome in acute myeloid leukemia; yet the mechanisms of this interplay are unknown. Using a systems approach within topologically associating domains, we find that genes with significant expression-methylation correlations are enriched in signaling and metabolic pathways. The common denominator across these methylation-regulated genes is the density in MIR retrotransposons of their introns. Moreover, a discrete number of CpGs overlapping enhancers are responsible for regulating most of these genes. Established mouse models recapitulate the dependency of MIR-rich genes on the balanced expression of epigenetic modifiers, while projection of leukemic profiles onto normal hematopoiesis ones further consolidates the dependencies of methylation-regulated genes on MIRs. Collectively, MIR elements on genes and enhancers are susceptible to changes in DNA methylation activity and explain the cooperativity of proteins in this pathway in normal and malignant hematopoiesis.

Date: 2022
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DOI: 10.1038/s41467-022-34211-x

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