Sigma-1 receptor ligand PD144418 and sigma-2 receptor ligand YUN-252 attenuate the stimulant effects of methamphetamine in mice.
Psychopharmacology (Berl)
; 236(11): 3147-3158, 2019 Nov.
Article
em En
| MEDLINE
| ID: mdl-31139878
ABSTRACT
RATIONALE Previous research indicates that the selective sigma-1 receptor ligand PD144418 and the selective sigma-2 ligands YUN-252 can inhibit cocaine-induced hyperactivity. The effects of these ligands on other stimulants, such as methamphetamine, have not been reported. OBJECTIVES:
The present study examined the effects of PD144418 and YUN-252 pretreatment on methamphetamine-induced hyperactivity after acute treatment.METHODS:
Mice (n = 8-14/group) were injected with PD144418 (3.16, 10, or 31.6 µmol/kg), YUN-252 (0.316, 3.16, 31.6 µmol/kg), or saline. After 15 min, mice injected with 2.69 µmol/kg methamphetamine or saline vehicle, where distance traveled during a 60-min period was recorded. Additionally, the effect of PD144418 on the initiation and expression of methamphetamine sensitization was determined by treating mice (n = 8-14/group) with PD144418, methamphetamine or saline repeatedly over a 5-day period, and testing said mice with a challenge dose after a 7-day withdrawal period.RESULTS:
Results indicate that both PD144418 and YUN-252, in a dose-dependent manner, attenuated hyperactivity induced by an acute methamphetamine injection. Specifically, 10 µmol/kg or 31.6 µmol/kg of PD144418 and 31 µmol/kg of YUN-252 suppressed methamphetamine-induced hyperactivity. In regard to methamphetamine sensitization, while 10 µmol/kg PD144418 prevented the initiation of methamphetamine sensitization, it did not have an effect on the expression.CONCLUSIONS:
Overall, the current results suggest an intriguing potential for this novel sigma receptor ligand as a treatment for the addictive properties of methamphetamine. Future analysis of this novel sigma receptor ligand in assays directly measuring reinforcement properties will be critical.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Piridinas
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Receptores sigma
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Estimulantes do Sistema Nervoso Central
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Isoxazóis
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Locomoção
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Metanfetamina
Limite:
Animals
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article