Ketamine, an anesthetic agent endowed with several morphine-like effects, failed to displace 3H-dihydromorphine or 3H-methionine-enkephalin from opiate receptors in the rat brain synaptosomal-mitochondrial membrane preparations. Furthermore, ketamine-induced analgesia in rats was not antagonized by naloxone, suggesting that this effect is not mediated by opiate receptors.
Failure of ketamine to interact with opiate receptors
FRATTA, WALTER;CASU, MARIANO;LOVISELLI, ANDREA;
1980-01-01
Abstract
Ketamine, an anesthetic agent endowed with several morphine-like effects, failed to displace 3H-dihydromorphine or 3H-methionine-enkephalin from opiate receptors in the rat brain synaptosomal-mitochondrial membrane preparations. Furthermore, ketamine-induced analgesia in rats was not antagonized by naloxone, suggesting that this effect is not mediated by opiate receptors.
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