PF-06409577

PF-06409577 is a potent and selective allosteric activator of AMPK α1β1γ1 isoform with an EC₅₀ of 7 nM. IC50 & Target: EC50: 7 nM (AMPK α1β1γ)^[1] In Vitro: PF-06409577 possesses similar potency toward the human and rat α1β1γ1 isoforms. In broad panel screening against other receptors, channels, PDEs and kinases, PF-06409577 exhibits minimal off-target pharmacology. PF-06409577 shows no detectable inhibition of hERG in a patch-clamp assay (100 µM) and is not an inhibitor (IC₅₀>100 µM) of the microsomal activities of major human cytochrome P450 isoforms^[1]. In Vivo: PF-06409577 demonstrates moderate plasma clearance in rats, dogs, and monkeys, and is well distributed with steady state distribution volume. Following oral administration of crystalline PF-06409577 in 0.5% methylcellulose suspension, PF-06409577 is rapidly absorbed in rats, dogs, and monkeys. The corresponding oral bioavailability values in rats, dogs, and monkeys, are 15%, 100%, and 59%, respectively. Dose responsive increases in pAMPK relative to total AMPK (tAMPK) in whole kidney tissue are observed with a maximal 3.8-fold response at 300 mg/kg PF-06409577 treatment^[1]. Oral administration of PF-06409577 (10, 30, and 100 mg/kg QD) results in dose-dependent reductions in proteinuria in the obese ZSF1 animals, with greater than 2-fold reduction in 24-hour urinary albumin loss compared to vehicle control after 60 days of treatment^[1].