MLLr cells were treated with increasing concentrations of the BRD4 inhibitor JQ1 and PF-9366 (MAT2Ai) or their combination...A dose-dependent increase in apoptosis could be observed by utilizing both inhibitors alone or in combination leading to a synergistic effect (combination index (CI) of 0.75). Furthermore, inhibitor treatment led to decreased cell viability and reduced proliferation which was further augmented with the combination treatment.