Aberrant splicing of MBD1 reshapes the epigenome to drive convergent myeloerythroid defects in MDS

The authors investigate the role of a novel MBD1 isoform (MBD1-L) in myelodysplastic neoplasms (MDS) and its impact on hematopoietic function, particularly in the context of splicing abnormalities independent of specific mutations. They find that MBD1-L, driven by reduced WTAP expression, leads to significant myeloerythroid defects by altering MBD1's binding behavior and epigenetic regulation, and they demonstrate that reversing this aberrant splicing can enhance erythroid differentiation in MDS samples, highlighting the potential for RNA-based therapies.