Rapastinel Trifluoroacetate

Rapastinel Trifluoroacetate is an NMDA receptor modulator with glycine-site partial agonist properties and currently in a phase II clinical development program as an adjunctive therapy for major depressive disorder.

Signaling Pathways >> Membrane Transporter/Ion Channel >> iGluR

Signaling Pathways >> Neuronal Signaling >> iGluR

Research Areas >> Neurological Disease

NMDA receptor[1]

Rapastinel Trifluoroacetate is an NMDA receptor modulator with glycine-site partial agonist properties and currently in a phase II clinical development program as an adjunctive therapy for major depressive disorder. Mice given Rapastinel Trifluoroacetate (1.0 mg/kg) prior to acute ketamine (30 mg/kg) show clear preference for novel compare to familiar objects (P<0.01)[1]. Rapastinel Trifluoroacetate produces an antidepressant like effect in the USVs test, as indexed by an increase in hedonic 50-kHz USVs [F(1,20)=12.4, P<0.05] and a decrease in aversive 20-kHz USVs [F(1,20)=6.8, P<0.05]. Rapastinel Trifluoroacetate also produces an anxiolytic effect in the open field, as indexed by increased center time [F(1,20)=19.2, P<0.05] without altering locomotor activity as measured by line crosses [F(1,20)=0.0, P>0.05][2].

Male C57BL/6J mice are used in this study. Mice are group housed (five/cage) in a controlled environment held at 21±2°C with a 14:10 h light-dark period (lights on:±05:00 am). All experiments are conducted during the light phase. Food and water are available ad libitum. For acute drug treatments, Rapastinel Trifluoroacetate (1.0 mg/kg, iv) is administered 30 min prior to the acquisition trial of the novel object recognition (NOR) task to the subchronic ketamine or subchronic phencyclidine (PCP)-treated animals[1].

[1]. Rajagopal L, et al. GLYX-13 (rapastinel) ameliorates subchronic phencyclidine- and ketamine-induced declarative memory deficits in mice. Behav Brain Res. 2016 Feb 15;299:105-10.

[2]. Burgdorf J, et al. The long-lasting antidepressant effects of rapastinel (GLYX-13) are associated with a metaplasticity process in the medial prefrontal cortex and hippocampus. Neuroscience. 2015 Nov 12;308:202-11.

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