Psychosocial stress is associated with in vivo dopamine release in human ventromedial prefrontal cortex: A positron emission tomography study using [F-18]fallypride

Johan Lataster, Dina Collip, Jenny Ceccarini, David Haas, Linda Booij, Jim van Os, Jens Pruessner, Koen Van Laere, Inez Myin-Germeys*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

74 Citations (Web of Science)

Abstract

Rodent studies suggest that prefrontal dopamine neurotransmission plays an important role in the neural processing of psychosocial stress. Human studies investigating stress-induced changes in dopamine levels, however, have focused solely on striatal dopamine transmission. The aim of this study was to investigate in vivo dopamine release in the human prefrontal cortex in response to a psychosocial stress challenge, using the highly selective dopamine D-2/3 PET radioligand [F-18]fallypride in healthy subjects. Twelve healthy subjects (age (y): 39.8; SD = 15.8) underwent a single dynamic Positron Emission Tomography (PET) scanning session after intravenous administration of 185.2 (SD = 10.2) MBq [F-18]fallypride. Psychosocial stress was initiated at 100 min postinjection. PET data were analyzed using the linearized simplified reference region model (LSRRM), which accounts for time-dependent changes in [F-18]fallypride displacement. Voxel-based statistical maps, representing specific D-2/3 binding changes, were computed to localize areas with increased ligand displacement after task initiation, reflecting dopamine release. The psychosocial stress challenge induced detectable amounts of dopamine release throughout the prefrontal cortex, with dopaminergic activity in bilateral ventromedial prefrontal cortex being associated with subjectively rated experiences of psychosocial stress. The novel finding that a mild psychosocial stress in humans induces increased levels of endogenous dopamine in the PFC indicates that the dynamics of the dopamine-related stress response cannot be interpreted by focusing on mesolimbic brain regions alone.
Original languageEnglish
Pages (from-to)1081-1089
JournalNeuroimage
Volume58
Issue number4
DOIs
Publication statusPublished - 15 Oct 2011

Keywords

  • Dopamine
  • Prefrontal
  • Stress
  • Cortisol
  • Fallypride

Cite this