What question did this study set out to answer?

To delineate RUNX1's role in gene regulation and its interaction with co-factors in leukemia and normal cells.

December 8, 2025Blood

Context-dependent recruitment of co-factors directs RUNX1 activity in normal and leukemic cells

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Findings show RUNX1 recruits co-activators and co-repressors, indicating its dual role in gene regulation in leukemia.

To delineate RUNX1's role in gene regulation and its interaction with co-factors in leukemia and normal cells.
Utilized an in vivo tethering system to observe RUNX1 effects in a neutral chromatin context.
Performed unbiased correlation analysis at RUNX1 ChIP-seq peaks in leukemic cell lines.
Conducted RUNX1 overexpression and siRNA knockdowns in mouse and KMT2A::AFF1 SEM cells.
RUNX1 recruits both co-activators and co-repressors, functioning in gene activation and repression.
Found positive correlation between RUNX1 binding and active histone modifications such as H3K4me3.
C-terminally truncated RUNX1 mutant proteins fail to recruit PRC1, indicating a role in stabilizing binding.

Dimou et al. (2025) studied this question.

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