LP-935509 is a selective, brain-permeable, small molecule competitive inhibitor of articulin-2-associated kinase 1 (AAK1) with an IC50 of 3.3 nM and a Ki of 0.9 nM. LP-935509 is a potent inhibitor of BIKE (IC50 of 14 nM) and a moderate inhibitor of GAK (IC50 of 320±40 nM).

GAK:320 nM, AAK1:0.9 nM(Ki), AAK1:3.3 nM, BIKE:14 nM

METHODS: The effects of LP-935509 on the activities of the two most closely related kinases, BIKE and GAK kinases, were evaluated; the ability of 1 μM LP-935509 to inhibit the binding of 389 kinases to ATP-binding probes was measured.
RESULTS LP-935509 is a potent inhibitor of BIKE (IC50= 14 nM) and a modest inhibitor of GAK (IC50= 320 ± 40 nM), and LP-935509 inhibited the binding of more than 70% of the probes to 13 kinases, including BIKE. [1]

METHODS: LP-935509 (10, 30, and 60 mg/kg) was administered orally (10 ml/kg), and Von Frey tests were performed at 0, 30, and 120 min after administration.
RESULTS Oral administration of LP-935509 resulted in a dose-dependent reduction in phase II paw withdrawal that was significantly lower than that in vehicle-treated animals (Figure 3A). In particular, 30 mg/kg and 60 mg/kg of LP-935509 resulted in a significant reduction in pain behavior. [1]