Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-28896

Roiser, J P; Levy, J; Fromm, S J; Nugent, A C; Talagala, S L; Hasler, G; Henn, F A; Sahakian, B J; Drevets, W C (2009). The effects of tryptophan depletion on neural responses to emotional words in remitted depression. Biological Psychiatry, 66(5):441-450.

[img] PDF - Registered users only
1MB

View at publisher

Abstract

BACKGROUND: Major depressive disorder (MDD) has been associated with both dysfunction of the central serotonergic system and abnormal responses to emotional stimuli. We used acute tryptophan depletion (ATD) to investigate the effect of temporarily reducing brain serotonin synthesis on neural and behavioral responses to emotional stimuli in remitted MDD subjects (rMDD) and healthy control subjects. METHODS: Twenty control subjects and 23 rMDD subjects who had been unmedicated and in remission for > or =3 months completed the study. Following tryptophan or sham depletion, participants performed an emotional-processing task during functional magnetic resonance imaging. In addition, resting state regional blood flow was measured using arterial spin labeling. RESULTS: Neither group exhibited significant mood change following ATD. However, tryptophan depletion differentially affected the groups in terms of hemodynamic responses to emotional words in a number of structures implicated in the pathophysiology of MDD, including medial thalamus and caudate. These interactions were driven by increased responses to emotional words in the control subjects, with little effect in the patients under the ATD condition. Following ATD, habenula blood flow increased significantly in the rMDD subjects relative to the control subjects, and increasing amygdala blood flow was associated with more negative emotional bias score across both groups. CONCLUSIONS: These data provide evidence for elevated habenula blood flow and alterations in the neural processing of emotional stimuli following ATD in rMDD subjects, even in the absence of overt mood change. However, further studies are required to determine whether these findings represent mechanisms of resilience or vulnerability to MDD.

Citations

39 citations in Web of Science®
42 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

1 download since deposited on 29 Jan 2010
0 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Psychiatry and Psychotherapy
DDC:610 Medicine & health
Language:English
Date:2009
Deposited On:29 Jan 2010 09:57
Last Modified:27 Nov 2013 23:15
Publisher:Elsevier
ISSN:0006-3223
Publisher DOI:10.1016/j.biopsych.2009.05.002
PubMed ID:19539268

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page