Selective activation of dopaminergic pathways in the mesocortex by compounds that act at the phencyclidine (PCP) binding site: tentative evidence for PCP recognition sites not coupled to N-methyl-D-aspartate (NMDA) receptors.

Abstract:

:Several lines of evidence suggest a tight functional coupling between N-methyl-D-aspartate (NMDA) and phencyclidine (PCP) receptors. The effects of PCP receptor agonists (PCP, dexoxadrol, ketamine and MK-801) and NMDA receptor antagonists, cis-4-phosphonomethyl-2-piperidine carboxylic acid (CGS-19755) and 3-(2-carboxypiperizin-4-yl)-propyl-1-phosphonic acid (CPP), have been examined on the metabolism of dopamine in the mesocortex, with a view of studying the coupling between these two receptor systems. Phencyclidine receptor agonists selectively increased the metabolism of dopamine in the mesocortex without affecting the metabolism of dopamine in the striatum. N-Methyl-D-aspartate and the competitive antagonists of NMDA receptors did not effect the metabolism of dopamine, neither did the sigma receptor ligands, 1,3-di-(2-tolyl)guanidine (DTG) and rimcazole. Rimcazole also did not affect the increases in the metabolism of dopamine in the mesocortex, seen after MK-801. These data indicate that dopaminergic neurons in the mesocortex are positively modulated by PCP receptors but tentatively suggest that those recognition sites for PCP are not coupled to NMDA receptors.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Rao TS,Kim HS,Lehmann J,Martin LL,Wood PL

doi

10.1016/0028-3908(90)90005-c

subject

Has Abstract

pub_date

1990-03-01 00:00:00

pages

225-30

issue

3

eissn

0028-3908

issn

1873-7064

journal_volume

29

pub_type

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