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Yarbrouch GG, Singh DK, Pettibone DJ. 
“A Comparative Electrophysiological And Biochemical Assessment Of Serotonin (5-ht) And A Novel 5-ht Agonist (mk-212) On Central Serotonergic Receptors”. 
Neuropharmacology. 1984;23(11):1271-1277.
Abstract
The inhibitory effects of microiontophoretically-applied serotonin (5-HT) and 6-chloro-2[1-piperazinyl]pyrazine (MK-212) were examined on spontaneously bring somatosensory cerebral cortical neurons and dorsal raphe neurons in rats anesthetized with chloral hydrate. On cortical neurons, MK-212 caused only weak and variable inhibition of extracellularly recorded neuronal activity, compared to the effects of 5-HT However, on raphe cells, MIC-212 exerted potent inhibitory effects, equivalent to those observed with 5-HT. In contrast to the inhibitory actions of lysergic acid diethylamide (LSD) and 5-HT at presumed 5-HT autoreceptors, MK-212 did not affect the In vitro release of [3H]5-HT from slices of rat hypothalamus stimulated by methiothepin. These findings, coupled with previously reported behavioral, biochemical and electrophysiological effects of MK-212 may indicate that this novel serotonergic agonist uniquely discriminates between subsets of serotonergic receptors in the CNS.
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