Obesity and ADHD: Exploring the role of body composition, BMI polygenic risk score, and reward system genes.
J Psychiatr Res
; 136: 529-536, 2021 04.
Article
en En
| MEDLINE
| ID: mdl-33127071
ABSTRACT
The association between obesity and attention-deficit hyperactivity disorder (ADHD) has been extensively reported in the literature. However, the potential mechanisms underlying this association are not completely understood. This study aimed to evaluate the association between body composition and ADHD and explore the possible genetic mechanisms involved. We used data from the 1982 Pelotas (Brazil) Birth Cohort at age 30-year follow-up (N = 3630). We first used logistic regression analysis to test whether body mass index (BMI), fat mass (FM), and fat-free mass (FFM) were associated with ADHD. We further tested the association between BMI polygenic risk score (BMI-PRS) and ADHD and the role of the genes upregulated in the reward system using a gene-set association approach. BMI (odds ratio [OR] = 1.05; 95% confidence interval [CI], 1.00-1.09; p = 0.038) and FM (OR = 1.04; 95% CI, 1.00-1.07; p = 0.043) were associated with ADHD. The BMI-PRS was associated with ADHD (using p-value threshold (PT) = 0.4; OR = 1.65; 95% CI, 1.02-2.65) at a nominal level. In gene-set analysis, the reward system genes were associated with BMI in subjects with a high BMI-PRS score, considering PT = 0.4 (p = 0.014). The results suggest that BMI genetic components, especially those genes related to the reward system, may be involved in this association.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Trastorno por Déficit de Atención con Hiperactividad
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
Límite:
Adult
/
Humans
País/Región como asunto:
America do sul
/
Brasil
Idioma:
En
Revista:
J Psychiatr Res
Año:
2021
Tipo del documento:
Article
País de afiliación:
Brasil