MLN-4924

An analog of adenosine 5’-monophosphate that potently and selectively inhibits NEDD8-activating enzyme (NAE) with IC50 of 4.7 nM; also inhibits the related enzymes ubiquitin-activating enzyme (UAE) and SUMO-activating enzyme (SAE) with IC50 of 1.5 and 8.2 uM, respectively; disrupts CRL-mediated protein turnover leading to apoptosis in HCT116 cells, suppresses the growth of human tumor xenografts in mice (30-60 mg/kg).Blood Cancer Phase 2 Clinical(In Vitro):Pevonedistat (MLN4924) is a potent inhibitor of NAE, and is selective relative to the closely related enzymes UAE, SAE, UBA6 and ATG7 (IC50=1.5, 8.2, 1.8 and >10 μM, respectively) when evaluated in purified enzyme assays that monitor the formation of E2-UBL thioester reaction products. Pevonedistat (MLN4924) selectively inhibits NAE activity compared to the closely related ubiquitin-activating enzyme (UAE, also known as UBA1) and SUMO-activating enzyme (SAE; a heterodimer of SAE1 and UBA2 subunits), in purified enzyme and cellular assays. MLN4924 exhibits potent cytotoxic activity against a variety of human tumour-derived cell lines.(In Vivo):Pevonedistat (MLN4924) (sc, 10 mg/kg, 30 mg/kg, or 60 mg/kg) inhibits the NEDD8 pathway resulting in DNA damage in Mice bearing HCT-116 xenografts.Pevonedistat (sc, 120 mg/kg) and TNF-α (10 μg/kg) synergistically cause liver damage in SD rats.