Methamphetamine reward in mice as assessed by conditioned place preference test with Supermex sensors: effect of subchronic clorgyline pretreatment.
Recent studies in our laboratory have shown that methamphetamine (METH)-induced hyperlocomotion and behavioral sensitization in mice were inhibited by clorgyline, an irreversible monoamine oxidase inhibitor. In this study, the effect of clorgyline pretreatment on METH-induced rewarding effect was assessed by a conditioned place preference (CPP) test, using an apparatus developed with Supermex sensors (infrared pyroelectric sensors). Although intact male ICR mice showed significant CPP for METH (0.5 mg/kg, i.p.), pretreatment with subchronic clorgyline (0.1 and 10 mg/kg, s.c.) did not affect the magnitude of CPP. At a dose of 1 mg/kg, pretreatment of the mice with clorgyline showed a similar CPP index in both saline/saline and METH/saline pairing groups. During the conditioning session, the mice did not express behavioral sensitization to METH. Pretreatment with clorgyline (0.1, 1, and 10 mg/kg) decreased striatal apparent monoamine turnover in a dose-dependent manner. These results indicated that clorgyline pretreatment (0.1 and 10 mg/kg) did not influence the METH-induced rewarding effect in mice, although pretreatment of the mice with clorgyline at a dose of 1 mg/kg appeared to influence the CPP for METH.
Kitanaka
Nobue
N
Department of Pharmacology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan.
Kitanaka
Junichi
J
Tatsuta
Tomohiro
T
Watabe
Kaname
K
Morita
Yoshio
Y
Takemura
Motohiko
M
D000704:Analysis of Variance; D000818:Animals; D003010:Clorgyline / Q000008:administration & dosage*; D003214:Conditioning, Classical; D004298:Dopamine / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D008297:Male; D008694:Methamphetamine / Q000008:administration & dosage*; D051379:Mice; D008813:Mice, Inbred ICR; D009042:Motivation
D008694:Methamphetamine; D003010:Clorgyline; D004298:Dopamine