학술논문
Obesity and Cerebral Blood Flow in the Reward Circuitry of Youth With Bipolar Disorder
REGULAR RESEARCH ARTICLE
REGULAR RESEARCH ARTICLE
Document Type
Report
Author
Source
International Journal of Neuropsychopharmacology. June 2022, Vol. 25 Issue 6, p448, 9 p.
Subject
Language
English
ISSN
1461-1457
Abstract
Introduction In adults with bipolar disorder (BD), there are high rates of obesity in both epidemiologic and clinical samples, and comorbid obesity is associated with a more severe course of [...]
Background: Bipolar disorder (BD) is associated with elevated body mass index (BMI) and increased rates of obesity. Obesity among individuals with BD is associated with more severe course of illness. Motivated by previous research on BD and BMI in youth as well as brain findings in the reward circuit, the current study investigates differences in cerebral blood flow (CBF) in youth BD with and without comorbid overweight/obesity (OW/OB). Methods: Participants consisted of youth, ages 13-20 years, including BD with OW/OB ([BD.sub.OW/OB]; n = 25), BD with normal weight ([BD.sub.NW]; n = 55), and normal-weight healthy controls (HC; n=61). High-resolution T1-weigh ted and pseudo-continuous arterial spin labeling images were acquired using 3 Tesla magnetic resonance imaging. CBF differences were assessed using both region of interest and whole-brain voxel-wise approaches. Results: Voxel-wise analysis revealed significantly higher CBF in reward-associated regions in the [BD.sub.NW] group relative to the HC and [BD.sub.OW/OB] groups. CBF did not differ between the HC and [BD.sub.OW/OB] groups. There were no significant region of interest findings. Conclusions: The current study identified distinct CBF levels relating to BMI in BD in the reward circuit, which may relate to underlying differences in cerebral metabolism, compensatory effects, and/or BD severity. Future neuroimaging studies are warranted to examine for changes in the CBF-OW/OB link over time and in relation to treatment. Keywords: Bipolar disorder, youth, body mass index, cerebral blood flow, reward circuit
Background: Bipolar disorder (BD) is associated with elevated body mass index (BMI) and increased rates of obesity. Obesity among individuals with BD is associated with more severe course of illness. Motivated by previous research on BD and BMI in youth as well as brain findings in the reward circuit, the current study investigates differences in cerebral blood flow (CBF) in youth BD with and without comorbid overweight/obesity (OW/OB). Methods: Participants consisted of youth, ages 13-20 years, including BD with OW/OB ([BD.sub.OW/OB]; n = 25), BD with normal weight ([BD.sub.NW]; n = 55), and normal-weight healthy controls (HC; n=61). High-resolution T1-weigh ted and pseudo-continuous arterial spin labeling images were acquired using 3 Tesla magnetic resonance imaging. CBF differences were assessed using both region of interest and whole-brain voxel-wise approaches. Results: Voxel-wise analysis revealed significantly higher CBF in reward-associated regions in the [BD.sub.NW] group relative to the HC and [BD.sub.OW/OB] groups. CBF did not differ between the HC and [BD.sub.OW/OB] groups. There were no significant region of interest findings. Conclusions: The current study identified distinct CBF levels relating to BMI in BD in the reward circuit, which may relate to underlying differences in cerebral metabolism, compensatory effects, and/or BD severity. Future neuroimaging studies are warranted to examine for changes in the CBF-OW/OB link over time and in relation to treatment. Keywords: Bipolar disorder, youth, body mass index, cerebral blood flow, reward circuit