当前位置： SCI文献检索 > NEUROIMAGE期刊下所有文献 > Psychosocial stress is associated with in vivo dopamine release in human ventromedial prefrontal cortex: a positron emission tomography study using [¹⁸F]fallypride.

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

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 D₂/₃ PET radioligand [¹⁸F]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 [¹⁸F]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 [¹⁸F]fallypride displacement. Voxel-based statistical maps, representing specific D₂/₃ 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.

journal_name

Neuroimage

journal_title

NeuroImage

authors

Lataster J,Collip D,Ceccarini J,Haas D,Booij L,van Os J,Pruessner J,Van Laere K,Myin-Germeys I

doi

10.1016/j.neuroimage.2011.07.030

subject

Has Abstract

pub_date

2011-10-15 00:00:00

pages

1081-9

issue

4

eissn

1053-8119

issn

1095-9572

pii

S1053-8119(11)00791-9

journal_volume

58

pub_type

杂志文章

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