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Negative modulation of α₅ GABAA receptors in rats may partially prevent memory impairment induced by MK-801, but not amphetamine- or MK-801-elicited hyperlocomotion. J Psychopharmacol 2015 Sep;29(9):1013-24

Date

06/25/2015

Pubmed ID

26105958

Pubmed Central ID

PMC4861997

DOI

10.1177/0269881115590601

Scopus ID

2-s2.0-84942084235   9 Citations

Abstract

Reportedly, negative modulation of α5 GABAA receptors may improve cognition in normal and pharmacologically-impaired animals, and such modulation has been proposed as an avenue for treatment of cognitive symptoms in schizophrenia. This study assessed the actions of PWZ-029, administered at doses (2, 5, and 10 mg/kg) at which it reached micromolar concentrations in brain tissue with estimated free concentrations adequate for selective modulation of α5 GABAA receptors, in three cognitive tasks in male Wistar rats acutely treated with the noncompetitive N-methyl-d-aspartate receptor antagonist, MK-801 (0.1 mg/kg), as well in tests of locomotor activity potentiated by MK-801 (0.2 mg/kg) or amphetamine (0.5 mg/kg). In a hormetic-like manner, only 5 mg/kg PWZ-029 reversed MK-801-induced deficits in novel object recognition test (visual recognition memory), whereas in the Morris water maze, the 2 mg/kg dose of PWZ-029 exerted partial beneficial effects on spatial learning impairment. PWZ-029 did not affect recognition memory deficits in social novelty discrimination procedure. Motor hyperactivity induced with MK-801 or amphetamine was not preventable by PWZ-029. Our results show that certain MK-801-induced memory deficits can be ameliorated by negative modulation of α5 GABAA receptors, and point to the need for further elucidation of their translational relevance to cognitive deterioration in schizophrenia.

Author List

Timić Stamenić T, Joksimović S, Biawat P, Stanković T, Marković B, Cook JM, Savić MM

Author

James M. Cook PhD University Distinguished Professor in the Chemistry and Biochemistry department at University of Wisconsin - Milwaukee




MESH terms used to index this publication - Major topics in bold

Amphetamine
Animals
Behavior, Animal
Benzodiazepines
Cognition Disorders
Dizocilpine Maleate
Hyperkinesis
Male
Maze Learning
Memory Disorders
Rats
Rats, Wistar
Receptors, GABA-A
Receptors, N-Methyl-D-Aspartate
Schizophrenia