PML and acute myeloid leukemia: We have previously shown that PML-RAR, the fusion oncoprotein linked to the pathogenesis of promyelocytic acute myeloid leukemia (AML), can induce a characteristic ubiquitin-proteasome system (UPS) mediated misfolding of NCoR protein, which ultimately contributed to the disintegration of PODs in promyelocytic AML (15, 16).