title: Non-competitive regulation of phencyclidine/sigma-receptors by the N-methyl-D-aspartate receptor antagonist D-(-)-2-amino-5-phosphonovaleric acid.
abstract: D-(-)-2-Amino-5-phosphonovaleric acid (D(-)AP5), a selective, potent competitive antagonist of N-methyl-D-aspartate (NMDA)-type excitatory amino acid receptors was used to investigate the relationship between NMDA receptors and phencyclidine (PCP) binding. Incubation of rat brain membranes with D(-)AP5 decreased the apparent number of PCP/sigma-receptors in dose-dependent fashion without affecting their affinity for [2-thienyl-3H]cyclohexylpiperidine (TCP). These data, taken together with electrophysiological evidence that PCP non-competitively antagonizes NMDA receptor-mediated transmission, are consistent with the hypothesis that the PCP/sigma-receptor may be situated in or near a channel regulated by an NMDA receptor complex.
mesh_terms: D015763:2-Amino-5-phosphonovalerate; D000818:Animals; D001921:Brain / Q000187:drug effects* / Q000503:physiopathology; D005971:Glutamates / Q000494:pharmacology; D018698:Glutamic Acid; D006801:Humans; D008297:Male; D010622:Phencyclidine / Q000031:analogs & derivatives / Q000378:metabolism; D051381:Rats; D016194:Receptors, N-Methyl-D-Aspartate; D017981:Receptors, Neurotransmitter / Q000187:drug effects* / Q000378:metabolism; D011957:Receptors, Opioid / Q000187:drug effects*; D017478:Receptors, Phencyclidine; D017480:Receptors, sigma; D012559:Schizophrenia / Q000503:physiopathology; D014633:Valine / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D005971:Glutamates; D016194:Receptors, N-Methyl-D-Aspartate; D017981:Receptors, Neurotransmitter; D011957:Receptors, Opioid; D017478:Receptors, Phencyclidine; D017480:Receptors, sigma; D018698:Glutamic Acid; D015763:2-Amino-5-phosphonovalerate; C012058:tenocyclidine; D014633:Valine; D010622:Phencyclidine