Methamphetamine-Induced Sensitization of Dopamine Release via a Metabotropic Glutamate Receptor Mediated Pathway in Rat Striatal Slices

[摘要] References(14)Cited-By(8)We studied the roles of metabotropic glutamate receptors in methamphetamine (MAP)induced sensitization of dopamine (DA) release from striatal slices. Rats were first treated with MAP (1 mg/kg, i.p.) once daily for 6 consecutive days. After a 6-day withdrawal, DA release from striatal slices evoked by ±-1-aminocyclopentane-trans-1, 3-dicarboxylic acid (trans-ACPD)was measured. transACPD-induced DA release was significantly enhanced in MAP-sensitized rats, but the inactive form of trans-ACPD (1R, 3S-ACPD) did not enhance DA release. The active form of trans-ACPD (1S, 3R-ACPD) (0.1 mM) -evoked DA release was attenuated by treatment with 0.4 MM RS-α-methyl-4-carboxyphenylglycine, a metabotropic glutamate receptor antagonist. The present results suggest that metabotropic glutamate receptors play an important role in expression of MAP-induced sensitization.

[学科分类] 药理学

[关键词] Methamphetamine-induced sensitization;Striatal dopamine release;Metabotropic glutamate receptor