Detailed Information on Publication Record
2011
Dopamine D-3 receptor knock-out mice exhibit increased behavioral sensitivity to the anxiolytic drug diazepam
LEGGIO, Gian Marc, Vincenzo MICALE, Bernard LE FOLL, Carmen MAZZOLA, Jose N. NOBREGA et. al.Basic information
Original name
Dopamine D-3 receptor knock-out mice exhibit increased behavioral sensitivity to the anxiolytic drug diazepam
Authors
LEGGIO, Gian Marc, Vincenzo MICALE, Bernard LE FOLL, Carmen MAZZOLA, Jose N. NOBREGA and Filippo DRAGO
Edition
European Neuropsychopharmacology, Amsterdam, Elsevier, 2011, 0924-977X
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
30000 3. Medical and Health Sciences
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 4.046
Organization unit
Central European Institute of Technology
UT WoS
000289393700006
Keywords in English
Dopamine; D-3 dopamine receptor; Knock-out mice; Diazepam; Elevated plus maze test; Novelty-induced grooming sampling test; GABAA receptor binding
Tags
Tags
International impact, Reviewed
Změněno: 7/8/2012 16:06, Olga Křížová
Abstract
V originále
Dopamine D-3 receptors (DRsD3) seem to have a pivotal role in mood disorders. Using the elevated plus maze (EPM) and the novelty-induced grooming test (NGT), we assessed the responses of DRD3-deficient (D-3(-/-)) mice to the acute treatment (different testing time) with the anxiolytic drug, diazepam. D-3(-/-) mice treated with diazepam (0.1 or 0.5 mg/kg) exhibited a better behavioral response in the EPM than their wild type (WT). Furthermore, in D-3(-/-) mice, but not in WT, 1 mg/kg diazepam induced anxiolytic effects at all testing times. The contribution of DRsD3 in the anxiolytic effects of diazepam was confirmed by similar results obtained in EPM by using the selective DRD3 antagonist U99194A (10 mg/kg) in combination with diazepam, in WT animals. D-3(-/-) mice treated with diazepam (all doses), also showed a decrease in grooming behavior. However, the [H-3] flunitrazepam autoradiographic analysis revealed no significant changes in D-3(-/-) mice compared to WT, suggesting that if gamma-aminobutyric acid receptor GABA(A) changes are involved, they do not occur at the level of binding to benzodiazepine site. These data suggest that D-3(-/-) mice exhibit low baseline anxiety levels and provide the evidence that the DRD3 is involved in the modulation of benzodiazepine anxiolytic effects. (C) 2010 Elsevier B.V. and ECNP. All rights reserved.