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Serotonergic Function in Obsessive-Compulsive Disorder: Behavioral and Neuroendocrine Responses to Oral m-Chlorophenylpiperazine and Fenfluramine in Patients and Healthy Volunteers

  • Eric Hollander
  • , Concetta M. Decaria
  • , Anca Nitescu
  • , Robert Gully
  • , Raymond F. Suckow
  • , Thomas B. Cooper
  • , Jack M. Gorman
  • , Donald F. Klein
  • , Michael R. Liebowitz

Research output: Contribution to journalArticlepeer-review

247 Scopus citations

Abstract

• To evaluate serotonergic (5-hydroxytryptamine) function in obsessive-compulsive disorder, behavioral and neuroendocrine responses to m-chlorophenylpiperazine (m-CPP; 0.5 mg/kg orally) and fenfluramine hydrochloride (60 mg orally) were examined in 20 patients and 10 healthy controls under double-blind, placebo-controlled conditions. Following m-CPP, but not fenfluramine or placebo, 55% (11/20) of the patients with obsessive-compulsive disorder experienced a transient exacerbation of obsessivecompulsive disorder. Prolactin response was blunted in patients following m-CPP but not following fenfluramine. Patients with greater behavioral response to m-CPP had smaller prolactin responses. Cortisol response to m-CPP and fenfluramine did not significantly differ between the groups. Behavioral and neuroendocrine responses appeared divergent. This does not suggest simply upregulation or downregulation of 5-hydroxytryptamine receptors, but rather complex mechanisms involving multiple neurotransmitter and neuromodulator systems.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalArchives of General Psychiatry
Volume49
Issue number1
DOIs
StatePublished - Jan 1992
Externally publishedYes

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