PF-04859989 HCl

PF-04859989 hydrochloride is a brain-penetrant, irreversible kynurenine aminotransferase (KAT) II inhibitor with IC50s of 23 and 263 nM for hKAT II and rKAT II. PF-04859989 hydrochloride is selective for KAT II over human KAT I, KAT III, and KAT IV (IC50s of 22, 11, and >50 μM, respectively)[1].

Signaling Pathways >> Others >> Others

Research Areas >> Neurological Disease

In vivo pharmacokinetic and efficacy studies in rat show that PF-04859989 is a brain-penetrant, irreversible inhibitor and is capable of reducing brain kynurenic acid by 50% at a dose of 10 mg/kg (sc)[1]. Rats receiving PF-04859989 (5 mg/kg; i.p.) exhibited a significantly lower number of spontaneously active DA neurons pertrack[1]. Animal Model: Male Sprague-Dawley rats[2] Dosage: 5 mg/kg Administration: I.p. Result: Exhibited a significantly lower number of spontaneously active dopamine (DA) neurons pertrack compared to controls.

[1]. Dounay AB, et al. Discovery of Brain-Penetrant, Irreversible Kynurenine Aminotransferase II Inhibitors for Schizophrenia. ACS Med Chem Lett. 2012;3(3):187-192. Published 2012 Jan 25.

[2]. Linderholm KR, et al. Inhibition of kynurenine aminotransferase II reduces activity of midbrain dopamine neurons. Neuropharmacology. 2016;102:42-47.