TAK-063

Biological 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.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- and cGMP-dependent protein kinases. TAK-063 at 0.3 and 1 mg/kg p.o., strongly suppressed MK-801 [(5R,10S)-(+)-5-methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine]-induced hyperlocomotion, which is often used as a predictive model for antipsychotic-like activity in rodents. Upregulation of striatal cAMP/cGMP levels and the antipsychotic-like effect of TAK-063 were not attenuated after 15 days of pretreatment with TAK-063 in mice. The potential side effect profile of TAK-063 was assessed in rats using the clinical antipsychotics haloperidol, olanzapine, and aripiprazole as controls. TAK-063 did not affect plasma prolactin or glucose levels at doses up to 3 mg/kg p.o. At 3 mg/kg p.o., TAK-063 elicited a weak cataleptic response compared with haloperidol and olanzapine.Evaluation of pathway-specific markers (substance P mRNA for the direct pathway and enkephalin mRNA for the indirect pathway) revealed that TAK-063 activated both the direct and indirect pathways of MSNs.

Customer Product Validations & Biological Datas

	Source	J Pharmacol Exp Ther (2016). Figure 2. TAK-063
	Method	p.o.
	Cell Lines	naive rats
	Concentrations	0.1 and 0.3 mg/kg
	Incubation Time	60 or 90 minutes
	Results	Treatment with TAK-063 at 0.1 and 0.3 mg/kg p.o. significantly increased accuracy rates compared with vehicle treatment

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)

Species	Mouse	Rat	Rabbit	Guinea pig	Hamster	Dog
Weight (kg)	0.02	0.15	1.8	0.4	0.08	10
Body Surface Area (m2)	0.007	0.025	0.15	0.05	0.02	0.5
Km factor	3	6	12	8	5	20

Animal A (mg/kg) = Animal B (mg/kg) multiplied by	Animal B Km
	Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the K_m factor for a mouse and then divide by the K_m factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Chemical Information

References

In vivo pharmacological characterization of TAK-063, a potent and selective phosphodiesterase 10A inhibitor with antipsychotic-like activity in rodents.
Suzuki K, et al. J Pharmacol Exp Ther. 2015 Mar;352(3):471-9. PMID: 25525190.

Discovery of 1-[2-fluoro-4-(1H-pyrazol-1-yl)phenyl]-5-methoxy-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (TAK-063), a highly potent, selective, and orally active phosphodiesterase 10A (PDE10A) inhibitor.
Kunitomo J, et al. J Med Chem. 2014 Nov 26;57(22):9627-43. PMID: 25384088.