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PF-06409577 is a potent and selective allosteric activator of AMPK α1β1γ1 isoform with an EC50 of 7 nM.

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 uM) and is not an inhibitor (IC50>100 uM) of the microsomal activities of major human cytochrome P450 isoforms[1].

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].

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