XL041 (BMS-852927) is an LXRβ-selective agonist with 20% LXRα and 88% LXRβ activity compared to a full pan agonist in transactivation assays. XL041 is potent, with an EC 50 =9 nM and 26% activity in an in vitro human whole-blood endogenous target gene activation assay (WBA). BMS-852927 has similar binding affinity to LXRα and LXRβ (19 and 12 nM, respectively). MCE has not independently confirmed the accuracy of these methods. They are for reference only.
In Vivo
XL041 (BMS-852927), has a very favorable profile at efficacious doses in cynomolgus monkeys and mice. XL041 pre-treatment of C57BL/6J mice for 7 days results in potent, dose-dependent stimulation of cholesterol efflux in this system, reaching a maximum in the 3 mg/kg/day dose group of 70% above vehicle in the initial efflux rate. Similar results are obtained in LDLR knockout (KO) mice. In a separate study, XL041 inhibits the progression of atherosclerosis in a 12 week study in LDLR KO mice. Importantly, the dose response for inhibition of atherosclerosis (0.1-3 mg/kg/day) is similar to the dose response for macrophage reverse cholesterol transport (RCT) stimulation (0.03-3 mg/kg/day), a major underlying mechanism through which LXR agonists affect the disease . MCE has not independently confirmed the accuracy of these methods. They are for reference only.
