LP-922761 hydrate is a potent, selective and orally active adapter protein-2 associated kinase 1 (AAK1) inhibitor with IC50s of 4.8 nM and 7.6 nM in enzyme and cell assays, respectively. LP-922761 hydrate also inhibits BMP-2-inducible protein kinase (BIKE) with an IC50 of 24 nM. LP-922761 hydrate shows less activity at cyclin G-associated kinase (GAK), opioid, adrenergic α2 or GABAa receptors[1].
In mouse, LP-922761 has a brain to plasma ratio of 0.007, indicating that LP-922761 is essentially restricted to the peripheral compartment[1].
[1]. Kostich W, et al. Inhibition of AAK1 Kinase as a Novel Therapeutic Approach to Treat Neuropathic Pain. J Pharmacol Exp Ther. 2016 Sep;358(3):371-86.