RRC ID 70242
Author Sasamori H, Asakura T, Sugiura C, Bouchekioua Y, Nishitani N, Sato M, Yoshida T, Yamasaki M, Terao A, Watanabe M, Ohmura Y, Yoshioka M.
Title Behavioral characteristics of dopamine D5 receptor knockout mice.
Journal Sci Rep
Abstract Major psychiatric disorders such as attention-deficit/hyperactivity disorder and schizophrenia are often accompanied by elevated impulsivity. However, anti-impulsive drug treatments are still limited. To explore a novel molecular target, we examined the role of dopamine D5 receptors in impulse control using mice that completely lack D5 receptors (D5KO mice). We also measured spontaneous activity and learning/memory ability because these deficits could confound the assessment of impulsivity. We found small but significant effects of D5 receptor knockout on home cage activity only at specific times of the day. In addition, an analysis using the q-learning model revealed that D5KO mice displayed lower behavioral adjustment after impulsive actions. However, our results also showed that baseline impulsive actions and the effects of an anti-impulsive drug in D5KO mice were comparable to those in wild-type littermates. Moreover, unlike previous studies that used other D5 receptor-deficient mouse lines, we did not observe reductions in locomotor activity, working memory deficits, or severe learning deficits in our line of D5KO mice. These findings demonstrate that D5 receptors are dispensable for impulse control. Our results also indicate that time series analysis and detailed analysis of the learning process are necessary to clarify the behavioral functions of D5 receptors.
Volume 12(1)
Pages 6014
Published 2022-4-10
DOI 10.1038/s41598-022-10013-5
PII 10.1038/s41598-022-10013-5
PMID 35399112
PMC PMC8995362
MeSH Animals Dopamine* Humans Locomotion Mice Mice, Knockout Receptors, Dopamine D1 Receptors, Dopamine D5* / physiology
IF 3.998
Mice RBRC01084