title: Serotonergic mechanisms of cocaine effects in humans.
abstract: The objective of this study was to investigate the role of serotonin (5-HT) in mediating the effects of cocaine in humans. To accomplish this, 12 subjects each participated in two randomized, double-blind test sessions separated by 1 week. In one session, subjects underwent acute depletion of the 5-HT amino acid precursor tryptophan (TRP), followed by a test dose of intranasal cocaine. In the other session, the cocaine test dose was preceded by sham depletion. Subject ratings of cocaine "high" were significantly lower following active TRP depletion than after the sham procedure. Subjects also showed an earlier but less sustained rise in self-rated nervousness during active TRP depletion. These findings are consistent with the hypothesis that 5-HT may be involved in mediating the euphorigenic and modulating the anxiogenic effects of cocaine in humans, either directly or through actions on other (e.g., dopaminergic) systems.
authors.affiliation: Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA.
authors.forename: S C
authors.initials: SC
authors.lastname: Aronson
authors.forename: J E
authors.initials: JE
authors.lastname: Black
authors.forename: C J
authors.initials: CJ
authors.lastname: McDougle
authors.forename: B E
authors.initials: BE
authors.lastname: Scanley
authors.forename: P
authors.initials: P
authors.lastname: Jatlow
authors.forename: T R
authors.initials: TR
authors.lastname: Kosten
authors.forename: G R
authors.initials: GR
authors.lastname: Heninger
authors.forename: L H
authors.initials: LH
authors.lastname: Price
mesh_terms: D000328:Adult; D000339:Affect / Q000187:drug effects* / Q000502:physiology; D003042:Cocaine / Q000494:pharmacology*; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012701:Serotonin / Q000502:physiology*; D019966:Substance-Related Disorders / Q000503:physiopathology / Q000523:psychology; D013997:Time Factors; D014364:Tryptophan / Q000097:blood* / Q000378:metabolism
chemical_list: D012701:Serotonin; D014364:Tryptophan; D003042:Cocaine