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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Phencyclidine receptors in rat brain cortex.

The binding of [3H]phencyclidine ( PCP) to receptors in rat brain cortex has been studied. Two receptors have been detected, a high affinity receptor site with a KD of 23.5 +/- 7.4 nM and a low affinity site with a KD of 7.6 +/- 1.8 microM. The binding of [3H]PCP to its receptors was pH and temperature dependent and was destroyed by heat-denaturation. The binding of [3H]PCP was inhibited by compounds which produce PCP-like behavioral effects including dexoxadrol, etoxadrol and ketamine as well as a novel series of benz(f)isoquinolines. The low affinity site was blocked by PCP, etoxadrol and (+)-SKF-10,047 but not morphine or leu-enkephalin, suggesting that it also represents a specific PCP site. Stereoselective displacement of PCP at the high affinity receptor was observed with the isomers of cyclazocine, cyclorphan, SKF-10,047 and dioxadrol (dexoxadrol and levoxadrol). Naloxone, 4,5,6,7-tetrahydroisoxazolo(S,4-C)pyridin-3-ol (THIP) hydrate and haloperidol inhibited binding poorly (Ki greater than 1 microM), suggesting that these compounds do not interact significantly with the high affinity PCP receptor in vivo. The affinity of ligands for the phencyclidine receptor was highly correlated (r = 0.714, P less than 0.01) with their potency to produce catalepsy in pigeons.[1]


  1. Phencyclidine receptors in rat brain cortex. Mendelsohn, L.G., Kerchner, G.A., Kalra, V., Zimmerman, D.M., Leander, J.D. Biochem. Pharmacol. (1984) [Pubmed]
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