Effects of glycine antagonists on Mg(2+)- and glycine-induced [3H]N-(1-[2-thienyl]cyclohexyl)-3,4-piperidine binding.
We investigated the effects of glycine antagonists, 3-amino-1-hydroxy-2- pyrrolidone (HA-966), 7-chlorokynurenic acid (7-Cl-KYNA), 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX), 6,7-dichloro-3-hydroxy-2-quinoxalinecarboxylic acid (DHQXC), 6,7-dichloroquinoxaline-2,3-dione (DCQX), and 5-chloro-indole-2-carboxylic acid (5-Cl-I2CA), on Mg(2+)- and glycine-induced [3H]N-(1-[2-thienyl]cyclohexyl)-3,4-piperidine ([3H]TCP) binding to well-washed rat cortical membranes. Except for 5-Cl-I2CA, all the glycine antagonists completely inhibited not only glycine- but also Mg(2+)-induced [3H]TCP binding in a concentration-dependent manner. Out of all the glycine antagonists examined DHQXC most selectively inhibited Mg(2+)-induced [3H]TCP binding, while DCQX was the most selective for inhibiting glycine-induced [3H]TCP binding.
Hatta
K
K
Department of Psychopharmacology, Tokyo Institute of Psychiatry, Japan.
Yamamoto
T
T
Hori
T
T
Okuwa
M
M
Moroji
T
T
D000818:Animals; D001667:Binding, Competitive; D002540:Cerebral Cortex / Q000378:metabolism*; D005998:Glycine / Q000037:antagonists & inhibitors* / Q000494:pharmacology*; D007700:Kinetics; D008274:Magnesium / Q000494:pharmacology*; D008297:Male; D010622:Phencyclidine / Q000031:analogs & derivatives* / Q000378:metabolism; D011810:Quinoxalines / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar; D017478:Receptors, Phencyclidine / Q000187:drug effects / Q000378:metabolism*; D013570:Synaptic Membranes / Q000378:metabolism*; D014316:Tritium
D011810:Quinoxalines; D017478:Receptors, Phencyclidine; D014316:Tritium; C057665:6,7-dichloro-3-hydroxy-2-quinoxalinecarboxylic acid; C012058:tenocyclidine; D008274:Magnesium; D010622:Phencyclidine; D005998:Glycine