Deficits in sensorimotor gating and tests of social behavior in a genetic model of reduced NMDA receptor function
| Autor: | Gary E. Duncan, Wendy M Zinzow, Antonio Perez, Jeffrey A. Lieberman, Sheryl S. Moy, Dawn M Eddy, John N. Snouwaert, Beverly H. Koller |
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| Rok vydání: | 2004 |
| Předmět: |
Male
Reflex Startle Psychosis Prefrontal Cortex Mice Inbred Strains Gating Social Environment Gyrus Cinguli Hippocampus Receptors N-Methyl-D-Aspartate Mice Mice Neurologic Mutants Behavioral Neuroscience Moro reflex Genetic model medicine Animals Humans Attention Social Behavior Prepulse inhibition Motivation Models Genetic musculoskeletal neural and ocular physiology Motor Cortex Wild type Neural Inhibition Fear Somatosensory Cortex medicine.disease Disease Models Animal nervous system Schizophrenia Sensory Thresholds NMDA receptor Female sense organs Arousal Psychology Neuroscience Agonistic Behavior |
| Zdroj: | Behavioural Brain Research. 153:507-519 |
| ISSN: | 0166-4328 |
| DOI: | 10.1016/j.bbr.2004.01.008 |
| Popis: | Reduced NMDA receptor function is hypothesized to contribute to the pathophysiology of schizophrenia. In order to model chronic and developmental NMDA receptor hypofunction, a mouse line was developed that expresses low levels of the NMDA R1 subunit (NR1) of the NMDA receptor. The present study tested the hypothesis that these NR1 hypomorphic mice would exhibit deficits in sensorimotor and conspecific interactions, analogous to deficits observed in schizophrenic patients. F1 hybrid mice homozygous for the NR1 hypomorphic mutation (NR1 -/-) were generated by crossing heterozygous mice (NR1 +/-) from C57BL/6 and 129 Sv/Ev backgrounds. To assess sensorimotor gating, mice were tested in the paradigm of prepulse inhibition of acoustic startle. The NR1 hypomorphic mice exhibited increased acoustic startle responses and also showed deficits in prepulse inhibition. Startle responses were differentially altered by predator odor exposure in the male NR1 -/- mice, in comparison to control mice. In a test of social affiliation, the wild type mice spent significantly more time investigating a novel mouse in comparison to the NR1 -/- mice. In a resident-intruder test, marked deficits were found in sex-specific aggressive behavior between the wild type and mutant mice. These data support the contention that the NR1 hypomorphic mice exhibit alterations in sensorimotor gating and typical conspecific interactions, reminiscent of behavioral disturbances associated with schizophrenia. The NR1 hypomorphic mice could represent a model system to explore novel treatment and preventative strategies for certain symptoms of schizophrenia. |
| Databáze: | OpenAIRE |
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