Effects of phencyclidine on the release and synthesis of newly formed dopamine.
The effect of phencyclidine (PCP) on the release and synthesis of [3H]-dopamine ( [3H]-DA) newly synthesized from [3,5-3H]-L-tyrosine was studied under both basal and potassium-stimulated conditions in slices from the rat striatum. Phencyclidine (3-100 microM) stimulated the release of [3H]-DA during superfusion with low level potassium (4.5 mM) buffer, but had no effect on the release of [3H]-DA elicited by superfusion with buffer containing 40 mM potassium. On the other hand, phencyclidine had no effect (except at 100 microm) on the spontaneous release of [3H]-H2O (formed as a result of the hydroxylation of [3,5-3H]-L-tyrosine), but inhibited the increase in formation of [3H]-H2O normally associated with potassium-induced depolarization. These data are discussed in relation to results obtained with phencyclidine on other in vitro and in vivo models of dopaminergic function.
D000818:Animals; D003342:Corpus Striatum / Q000187:drug effects / Q000378:metabolism*; D004298:Dopamine / Q000096:biosynthesis / Q000378:metabolism*; D008297:Male; D010622:Phencyclidine / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism
D014446:Tyrosine 3-Monooxygenase; D010622:Phencyclidine; D011188:Potassium; D004298:Dopamine