Despite the overall improved diagnostics, standard of care and therapeutic options, most acute myeloid leukemia (AML) patients suffer from severe therapy-related side effects and still only 28% of them reach 5-year overall survival. The hypothesis that drives my project is that mutations which affect DNA-modifying enzymes disrupt a methylation-based control mechanism that regulates gene expression in a way that halts the normal cellular differentiation process. The discovery that vitamin C acts as an enzymatic co-factor that is able to revert this methylation defect in affected cells, provides a unique opportunity to transfer this knowledge to the development of novel, less toxic treatment strategies for patients that harbour these mutations. Within the scope of this project, I plan to explore whether and to which extent I can restore the normal DNA methylation signature in patient-derived leukemic cells in mice, either through vitamin C treatment alone or in addition to Health-Canada approved AML drugs. Further, I will explore the potential of vitamin C treatment to delay or prevent the transformation of not yet leukemic cellular states towards myeloid malignancy.