Brd4 inhibition reduces inflammatory signaling and impacts hematopoietic stem cell fitness in TET2 mutated models, indicating therapeutic potential.
Key Points
This research investigates the function of BRD4 in clonal hematopoiesis associated with TET2 mutations, focusing on its role in inflammation and hematopoietic stem cell behavior.
Analyzed PBMCs from healthy donors and CCUS patients cultured with LPS and the BET inhibitor PLX51107.
Utilized a Mx1 Cre Brd4 Tet2 conditional KO mouse model to explore Brd4's impact on inflammation and hematopoiesis.
Performed competitive repopulation studies in irradiated mice using WT and mutant marrow.
Inhibition of BRD4 reduced cytokine production and mRNA expression in response to LPS in PBMCs.
Tet2 KO HSCs exhibited increased repopulating capacity, while Brd4 Tet2 DKO showed no competitive advantage.
Gene expression analysis revealed Brd4-dependent pathways linked to inflammation and hematopoietic function.