Conditioned place preference/aversion to fenfluramine in fawn hooded and sprague-Dawley rats.
Animals; Avoidance Learning/*drug effects; Blood Platelets/metabolism; Brain Chemistry/genetics; Fenfluramine/*pharmacology; Habituation; Inbred Strains; Platelet Storage Pool Deficiency/physiopathology; Psychophysiologic/drug effects; Rats; Serotonin/metabolism/physiology; Species Specificity; Sprague-Dawley
The Fawn Hooded (FH) rat strain possesses a genetic platelet storage pool deficiency which leads to an impaired capacity for platelets to store and release serotonin. While the relationship between this deficit and possible alterations in brain serotonergic levels or function remains unclear, numerous behavioral studies have indicated that FH rats exhibit differential responses to serotonergic agonists and antagonist relative to other strains. The current study used the conditioned place preference paradigm to examine the ability of fenfluramine to produce a conditioned place preference (CPP) or aversion (CPA) in FH and Sprague-Dawley (SD) rats. Results indicated that fenfluramine failed to produce CPP or CPA in SD rats, but did produce a CPA in FH rats. Results are discussed in terms of the use of conditioned place preference to assess putative differences in serotonergic functioning in FH rats.
Meehan S M; Schechter M D
Progress in neuro-psychopharmacology & biological psychiatry
1994
1994-05
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1016/0278-5846(94)90014-0" target="_blank" rel="noreferrer noopener">10.1016/0278-5846(94)90014-0</a>
Lack of neuroleptic-like activity of l-fenfluramine.
Animals; Antipsychotic Agents/*pharmacology; Cues; Discrimination (Psychology)/drug effects; Dopamine Agents/pharmacology; Dopamine Antagonists; Fenfluramine/*pharmacology; Inbred Strains; Male; Phenylpropanolamine/pharmacology; Rats
Rats were trained to differentiate between the dopaminergically mediated discriminative stimuli produced by intraperitoneal administration of 4.8 mg/kg cathine and its vehicle. Once trained, three doses of l-fenfluramine (1.0, 2.0 and 2.5 mg/kg) were administered to determine if this agent would produce cathine-appropriate discriminative performance. All doses of l-fenfluramine were observed to produce vehicle-like responding. The 2.0 mg/kg dose of l-fenfluramine as well as 3.0 mg/kg chlorpromazine were administered in separate experiments prior to either cathine or vehicle. Chlorpromazine attenuated cathine-lever responding after cathine administration but did not affect vehicle responding. In contrast, l-fenfluramine had no effect upon cathine discrimination. The results indicate that l-fenfluramine shares neither agonist nor antagonist activity in the dopamine-mediated discriminative performance produced by cathine.
Schechter M D
Pharmacology, biochemistry, and behavior
1991
1991-06
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
<a href="http://doi.org/10.1016/0091-3057(91)90226-r" target="_blank" rel="noreferrer noopener">10.1016/0091-3057(91)90226-r</a>