Bipolar Disorder Clinical Trial
Official title:
Proton Magnetic Resonance Spectroscopy in Children and Adolescents With Bipolar Disorder
The primary aim of this study is to use proton magnetic resonance spectroscopy to look at myo-Inositol containing compounds (Ino) and creatine + phosphocreatine (Cr) in the anterior cingulate of 20 children with bipolar disorder between the ages of 6-17 years old free of risperidone treatment and 20 children with bipolar disorder after an eight-week or longer treatment with risperidone. For comparison, results will also be obtained from 20 controls (without bipolar disorder or ADHD) of the same age and gender as well as from 20 children or adolescents with a diagnosis of Attention Deficit Hyperactivity Disorder. We hypothesize that Ino/Cr levels in the anterior cingulate will correlate positively with manic symptoms using the Young mania rating scale (YMRS). Ino/Cr levels in the anterior cingulate in the anterior cingular gyrus will be lower in subjects who have received eight weeks or longer of risperidone
Choline containing compound (Cho) and creatine + phosphocreatine (Cr) have been found to be
greater in the orbitofrontal cortex of depressed adolescents. In addition, Cho/Cr has been
found to increase in the anterior cingulate in depressed patients with bipolar affective
disorder (BPD) compared with comparison subjects. Also, BPD subjects not taking
antidepressants had a significantly higher anterior cingulate Cho/Cr compared with subjects
taking antidepressants or comparison subjects. Therefore it would appear the frontal lobe
Cho/Cr is increased in depression. Given these findings, we are interested in looking at
subjects with mania to investigate if there may also be a biological marker for mania and
drug response. Mania measured using the YMRS have been associated with an increase in the
anterior cingulate Ino/Cr in manic children, adolescents, and adults with bipolar affective
disorder. In addition, children and adolescents who were responsive to lithium showed a
decrease in Ino/Cr levels after acute lithium treatment. We will test whether Ino/Cr levels
will correlate positively with manic symptoms using the YMRS, as well as whether overall
Ino/Cr levels will be lower for children and adolescents receiving risperidone.
The primary aim of this study is to use proton magnetic resonance spectroscopy to look at
myo-Inositol containing compounds (Ino) and creatine + phosphocreatine (Cr) in the anterior
cingulate of 20 children with bipolar disorder between the ages of 6-17 years old free of
risperidone treatment and 20 children with bipolar disorder after an eight-week or longer
treatment with risperidone. For comparison, results will also be obtained from 20 controls
(without bipolar disorder or ADHD) of the same age and gender as well as from 20 children or
adolescents with a diagnosis of Attention Deficit Hyperactivity Disorder. We hypothesize
that Ino/Cr levels in the anterior cingulate will correlate positively with manic symptoms
using the Young mania rating scale (YMRS). Ino/Cr levels in the anterior cingulate in the
anterior cingular gyrus will be lower in subjects who have received eight weeks or longer of
risperidone
;
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