In vitro activity: TAK-063 has potent inhibitory activity (IC50 = 0.30 nM), excellent selectivity (>15000-fold selectivity over other PDEs), and favorable pharmacokinetics, including high brain penetration, in mice. Oral administration of TAK-063 to mice elevated striatal 3',5'-cyclic adenosine monophosphate (cAMP) and 3',5'-cyclic guanosine monophosphate (cGMP) levels at 0.3 mg/kg and showed potent suppression of phencyclidine (PCP)-induced hyperlocomotion at a minimum effective dose (MED) of 0.3 mg/kg. TAK-063 at 0.3 and 1 mg/kg, p.o., increased cAMP and cGMP levels in the rodent striatum and upregulated phosphorylation levels of key substrates of cAMP-dependent and cGMP-dependent protein kinases. TAK-063 at 0.3 and 1 mg/kg, p.o., strongly suppressed MK-801-induced hyperlocomotion that is often used as a predictive model for antipsychotic-like activity in rodents. TAK-063 did not affect plasma prolactin or glucose levels at doses up to 3 mg/kg, p.o. TAK-063 at 3 mg/kg, p.o., elicited a weak cataleptic response compared with haloperidol and olanzapine.

Kinase Assay: Balipodect (TAK-063) is a highly potent, selective and orally active PDE10A inhibitor with IC50 of 0.30 nM;>15000-fold selectivity over other PDEs.