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Serotonergic function and suicidal behavior in schizophrenia.

Humberto Corrêa1, Fabrice Duval, Marie-Claude Mokrani

  • 1Centre Hospitalier, Secteur VIII, 68250 Rouffach, France. rrea@task.com.br

Schizophrenia Research
|June 27, 2002
PubMed
Summary
This summary is machine-generated.

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Reduced prolactin (PRL) response to D-fenfluramine (D-FEN) indicates suicidal tendencies in schizophrenia patients. This finding supports a link between serotonergic (5-HT) dysfunction and suicidal behavior across diagnoses.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Pharmacology

Background:

  • Altered serotonergic (5-HT) function, indicated by blunted prolactin (PRL) response to fenfluramine (FEN), is linked to suicidal behavior in depression and personality disorders.
  • The role of serotonergic dysfunction in suicidal behavior within schizophrenia remains less understood.

Purpose of the Study:

  • To investigate the relationship between suicidal behavior and PRL response to D-fenfluramine (D-FEN) in patients with schizophrenia.
  • To determine if D-FEN-induced PRL response serves as a biomarker for suicidal tendencies in schizophrenia.

Main Methods:

  • A D-fenfluramine (D-FEN) test was administered to 33 drug-free schizophrenic patients (12 with suicide attempt history, 21 without) and 18 healthy controls.
  • Prolactin (PRL) response (Delta PRL) was measured and compared between groups, controlling for basal PRL, age, sex, and clinical factors.

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Main Results:

  • Schizophrenic patients with a history of suicide attempts exhibited a significantly lower Delta PRL compared to those without a history (P<0.04) and healthy controls (P<0.0003).
  • Delta PRL did not differentiate schizophrenic patients without suicide attempts from healthy controls.
  • The observed differences were independent of basal PRL levels, age, sex, menstrual status, and demographic/clinical characteristics.

Conclusions:

  • Reduced PRL response to D-FEN is a potential biomarker for suicidal tendencies in schizophrenia.
  • These findings reinforce the hypothesis that serotonergic (5-HT) dysfunction is implicated in suicidal behavior across various psychiatric diagnoses, including schizophrenia.