PF-2545920

PF-2545920 is a potent and selective PDE10A inhibitor with IC50 of 0.37 nM, with >1000-fold selectivity over the PDE. IC50 value: 0.37 nM [1]Target: PDE10APDE10A subcutaneously administrated at dose of 1 mg/kg elevates striatal cGMP about 3 fold in male CD-1 mice, while PDE10A subcutaneously administrated at dose of 3.2 mg/kg displays a maximal elevation of striatal cGMP approximately a 5-fold increase in male CD-1 mice. PDE10A intravenous injected at a dose of 0.1 mg/kg in Sprague-Dawley rats displays clearance of 36 ml/min/Kg, DE10A intravenous injected at a dose of 0.3 mg/kg in Dog Beagle displays clearance of 7.2 ml/min/Kg in vivo clearance with a moderate volume of distribution, DE10A intravenous injected at a dose of 0.03 mg/kg in Monkey Cynomolgus displays clearance of 13.9 ml/min/Kg in vivo clearance with a moderate volume of distribution. PDE10A is active with an ED50 of 1 mg/kg at a significantly lower total plasma exposure (115 nM) in the conditioned avoidance response assay (CAR) in Sprague-Dawley rats [1]. MP-10 intraperitoneally administrated at dose of 0.3, 3, and 5 mg/kg in male CF-1 mice causes striking increases in GluR1 phosphorylation levels of 3-, 5.4-, and 4.1-fold , respectively. MP-10 at concentration of 1 μM treats Rat striatal slices for 30 min, the level of GluR1S845 phosphorylation at the cell surface is significantly increased 2-fold, without change the level of total GluR1 on the cell surface. MP-10 intraperitoneally administrated at dose of 0.3, 3, and 5 mg/kg in male CF-1 mice results in robust, statistically significant increases in CREBS133 phosphorylation of 3-, 4-, and 2.6-fold, respectively. MP-10 intraperitoneally administrated at dose of 3 mg/kg increases both enkephalin and substance-P mRNA levels in striatum of CF-1 mice. MP-10 intraperitoneally administrated at dose of 0.3-1 mg/kg decreases avoidance responding with a significant treatment effect in the mouse CAR model. Mice treated with MP-10 at dose of 0.03 mg/kg spents more time in the empty than social side in the mice, MP-10 also dose-dependently decreased locomotor activity [2].

Signaling Pathways >> Metabolic Enzyme/Protease >> Phosphodiesterase (PDE)

Research Areas >> Neurological Disease

[1]. Verhoest PR, et al. Discovery of a novel class of phosphodiesterase 10A inhibitors and identification of clinical candidate 2-[4-(1-methyl-4-pyridin-4-yl-1H-pyrazol-3-yl)-phenoxymethyl]-quinoline (PF-2545920) for the treatment of schizophrenia. J Med Chem, 2009, 52(16), 5188-5196.

[2]. Grauer SM, et al. Phosphodiesterase 10A inhibitor activity in preclinical models of the positive, cognitive, and negative symptoms of schizophrenia. J Pharmacol Exp Ther, 2009, 331(2), 574-590.

3-Isobutyl-1-methylxanthine | rolipram | PF-04957325 | AN-2728 | GLPG1690 | BAY-60-7550 | Icariin | Ibudilast | PF-8380 | TAK-063 | Dipyridamole | Cilostazol | GSK256066 | Cialis | Pentoxifylline