Evaluation of the acute oral toxicity and antipsychotic activity of a dual inhibitor of PDE1B and PDE10A in rat model of schizophrenia
Document Type
Article
Publication Date
12-1-2022
Abstract
Phosphodiesterase 1B (PDE1B) and PDE10A are dual-specificity PDEs that hydrolyse both cyclic adenosine monophosphate and cyclic guanosine monophosphate, and are highly expressed in the striatum. Several reports have suggested that PDE10A inhibitors may present a promising approach for the treatment of positive symptoms of schizophrenia, whereas PDE1B inhibitors may present a novel mechanism to modulate cognitive deficits. Previously, we have reported a novel dual inhibitor of PDE1B and PDE10A, compound 2 (3-fluorophenyl)(2-methyl-2,3-dihydro-4H-benzob]1,4]oxazin-4-yl )methanone] which has shown inhibitory activity for human recombinant PDE1B and PDE10A in vitro. In the present study, the safety profile of compound 2 has been evaluated in rats in the acute oral toxicity study, as well as; the antipsychotic-like effects in the rat model of schizophrenia. Compound 2 was tolerated up to 1 g/kg when administered at a single oral dose. Additionally, compound 2 has strongly suppressed ketamine-induced hyperlocomotion, which presented a model for the positive symptoms of schizophrenia. It has also shown an ability to attenuate social isolation induced by chronic administration of ketamine and enhanced recognition memory of rats in the novel object recognition test. Altogether, our results suggest that compound 2 represents a promising therapy for the treatment of the three symptomatic domains of schizophrenia.
Keywords
Phosphodiesterase 10A inhibitor, Presynaptic dopamine function, Negative symptoms, Discovery, Memory, Ketamine, Antioxidant, Involvement, Potent, Brain
Divisions
CHEMISTRY
Funders
Centre of Excellence in Research, Value Innovation and Entrepreneurship (CERVIE), UCSI University, Malaysia (Grant No: Proj-2019-In-FPS-018 & REIG-FPS-2020/065),Visiting Professor Grant from Chiang Mai University, Thailand (Grant No: R000026614)
Publication Title
PLoS ONE
Volume
17
Issue
12
Publisher
Public Library of Science
Publisher Location
1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA