6533b859fe1ef96bd12b6fc9

RESEARCH PRODUCT

NMDA-GABA interactions in an animal model of behaviour: a gating mechanism from motivation toward psychotic-like symptoms

M. SabatinoAngelo MineoG. CannizzaroMauro GagliandA. FlugyCarla Cannizzaro

subject

MaleN-MethylaspartatePoison controlGatingMotor ActivityPharmacologybehavioral disciplines and activitieschemistry.chemical_compoundDesipramineKindling NeurologicmedicineAnimalsPharmacology (medical)Rats WistarPentylenetetrazolSwimminggamma-Aminobutyric AcidBiological PsychiatryPharmacologyMotivationAlprazolamBehavior AnimalMuscimolDesipramineRatsnervous system diseasesDizocilpineDisease Models AnimalPsychiatry and Mental healthPsychotic DisordersNeurologyAlprazolamMuscimolchemistryAnesthesiaPentylenetetrazoleNeurology (clinical)Dizocilpine MaleatePsychologymedicine.drugBehavioural despair test

description

We studied the effects of desipramine, alprazolam, muscimol and dizocilpine (MK-801) (alone or associated with desipramine) in the forced swimming test in rats after long-lasting termination of chronic exposure to vehicle and pentylenetetrazol. Sensitisation with pentylenetetrazol was ineffective in changing immobility time in the forced swimming test compared to vehicle treatment; pentylenetetrazol enhanced the anti-immobility effect of desipramine, abolished the anti-immobility effect of alprazolam and did not affect the anti-immobility effect of muscimol. MK-801 at the dose that did not modify immobility time in vehicle-treated rats and in pentylenetetrazol-treated animals strongly potentiated the anti-immobility effect of desipramine in pentylenetetrazol-treated rats. MK-801 in association with desipramine induced a marked hyperlocomotion and hyperexcitability, with swaying movements and oral stereotypies in pentylenetetrazol-sensitised rats. Results are considered the experimental representation of a 'gating mechanism' toward psychotic-like symptoms.

https://doi.org/10.1016/0924-977x(94)90003-5