Linked Life Data

16012281

Source:http://linkedlifedata.com/resource/pubmed/id/16012281

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2005-7-13
pubmed:abstractText
Blood-oxygenation-level-dependent (BOLD) brain changes underlying response to quetiapine were examined using passive viewing of emotionally negative stimuli. Twelve DSM-IV schizophrenia patients with blunted affect (BA+) were scanned before and after 22 weeks of quetiapine treatment. Whole-brain, voxel-based methods were used to assess the differential hemodynamic response to quetiapine. In addition, a post hoc comparison to an independent group of 11 schizophrenia patients without blunted affect (BA-) was performed to compare them with BA+ (postquetiapine) in response to emotion processing. A 22-week treatment with quetiapine resulted in significant clinical improvement in the 12 study completers (mean +/- SD posttreatment PANSS blunted affect score of 5.50 +/- 0.76 at baseline to 2.08 +/- 1.00 at end point; t = 7.78, df = 11, P < 0.0001). Treatment response was associated with significant BOLD changes: increases in prefrontal cortex activation particularly in the right dorsolateral prefrontal cortex (DLPFC, BA 46) and the right anterior cingulate cortex (ACC, BA 32); and in the left putamen, right anterior temporal pole (ATP), and right amygdala. Conversely, before treatment with quetiapine, the same subjects activated the midbrain bilaterally and the right pons. The post hoc conjunctional analyses demonstrated that BA- subjects activated the left ACC, left insula, left ATP (BA 21), left ATP (BA 38), left amygdala, and right medial prefrontal cortex. Quetiapine seems to affect clinical recovery by modulating the functioning of specific brain regions. Unique BOLD changes in the putamen and DLPFC with quetiapine, in the BA+ postquetiapine, may reflect modality-specific effects. Controlled studies are needed to further assess these preliminary findings.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0271-0749
pubmed:author
pubmed:issnType
Print
pubmed:volume
25
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
367-71
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Differential hemodynamic brain activity in schizophrenia patients with blunted affect during quetiapine treatment.
pubmed:affiliation
Department of Neurological Sciences, Faculty of Medicine, University of Montreal, Montreal, Quebec, Canada.
pubmed:publicationType
Journal Article, Clinical Trial, Research Support, Non-U.S. Gov't