Relationship of executive functioning deficits to N-acetyl aspartate (NAA) and gamma-aminobutyric acid (GABA) in youth with bipolar disorder.
J Affect Disord
; 225: 71-78, 2018 01 01.
Article
in En
| MEDLINE
| ID: mdl-28800423
ABSTRACT
BACKGROUND:
Although cognitive deficits in bipolar disorder (BD) have been repeatedly observed, our understanding of these impairments at a mechanistic level remains limited. Few studies that investigated cognitive impairments in bipolar illness have examined the association with brain biochemistry. This pilot study utilized proton magnetic resonance spectroscopy (1H-MRS) to evaluate the relationship between neurocognitive performance and brain metabolites in youth with BD.METHODS:
Thirty participants, twenty depressed BD participants and ten healthy comparison participants, ages 13-21, completed mood and executive function measures. 1H-MRS data were also acquired from the anterior cingulate cortex (ACC) using two-dimensional (2D) J-resolved 1H-MRS sequence. Proton metabolites including N-acetyl aspartate (NAA) and gamma-aminobutyric acid (GABA) were quantified for both groups.RESULTS:
Participants with BD performed significantly lower on executive functioning measures than comparison participants. There were significant positive correlations between Wisconsin Card Sorting Test (WCST) performance and NAA (p < .001) and GABA (p < .01) in the ACC in bipolar youth, such that as WCST performance increased, both NAA and GABA levels increased.LIMITATIONS:
Small sample size and lack of control for medications.CONCLUSIONS:
These findings build on previous observations of biochemical alterations associated with BD and indicate that executive functioning deficits in bipolar youth are correlated with NAA and GABA. These results suggest that cognitive deficits occur early in the course of illness and may reflect risk factors associated with altered neurochemistry. Further investigation of the relationship between brain metabolites and cognition in BD may lead to important information for developing novel, targeted interventions.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bipolar Disorder
/
Aspartic Acid
/
Gamma-Aminobutyric Acid
/
Gyrus Cinguli
Type of study:
Observational_studies
/
Risk_factors_studies
Limits:
Adolescent
/
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
J Affect Disord
Year:
2018
Document type:
Article