Serotonin transporter characteristics in lymphocytes and platelets of male aggressive schizophrenia patients compared to non-aggressive schizophrenia patients

Tal Barkan, Avi Peled, Ilan Modai, Peretz Barak, Abraham Weizman, Moshe Rehavi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A large body of literature indicates that disturbances of central serotonin (5-HT) function play an important role in aggressive behavior. Results from open-label and placebo-controlled trials as well as the reported inverse relationship between 5-HT function and aggression in human subjects, suggest that reduced 5-HT activity is associated with aggressive behavior. The activity of the 5-HT transporter (5-HTT), as determined by [3H]5-HT uptake to blood lymphocytes, was measured in 20 currently aggressive and 20 non-aggressive male schizophrenia patients. In addition, the pharmacodynamic characteristics of platelet 5-HTT were assessed by [3H]citalopram binding. There were no significant differences in the density (Bmax) of platelet [3H]citalopram binding sites between the two groups. Similarly, the dissociation constant (Kd) values were indistinguishable. The maximum uptake velocity (Vmax) of [3H]5-HT to fresh lymphocytes and the Km values of the 5-HT to the transporter were significantly higher in currently aggressive compared to the non-aggressive schizophrenia patients. The association of high Vmax values with current aggressive behavior provides further support to the involvement of the 5-HTT in aggressive behavior as well as to the efficacy of 5-HTT blockers in the control of aggression. The role of the various components of the serotonergic system in the pathophysiology and treatment of aggressive behavior in schizophrenia needs to be further evaluated.

Original languageEnglish
Pages (from-to)572-579
Number of pages8
JournalEuropean Neuropsychopharmacology
Volume16
Issue number8
DOIs
StatePublished - Dec 2006

Keywords

  • Aggression
  • Lymphocytes
  • Platelets
  • Schizophrenia
  • Serotonin
  • Serotonin transporter

Fingerprint

Dive into the research topics of 'Serotonin transporter characteristics in lymphocytes and platelets of male aggressive schizophrenia patients compared to non-aggressive schizophrenia patients'. Together they form a unique fingerprint.

Cite this