Pilot multi-site and reproducibility study of hypothalamic gliosis in children

Autor(es)

Sewaybricker, Leticia E. ^[1] ; Melhorn, Susan J. ^[1] ; Papantoni, Afroditi ^[2] ; Webb, Mary F. ^[1] ; Hua, Jun ^{[3, 4]} ; Roth, Christian L. ^[5] ; Carnell, Susan ^[2] ; Schur, Ellen A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Washington, Dept Med, 750 Republican St Box 358062, Seattle, WA 98109 - USA

^[2] Johns Hopkins Univ, Sch Med, Dept Psychiat & Behav Sci, Div Child & Adolescent Psychiat, Baltimore, MD 21205 - USA

^[3] Johns Hopkins Univ, Sch Med, Russell H Morgan Dept Radiol & Radiol Sci, Neurosect, Div MRI Res, Baltimore, MD - USA

^[4] Kennedy Krieger Inst, FM Kirby Res Ctr Funct Brain Imaging, Baltimore, MD - USA

^[5] Seattle Childrens Res Inst, Dept Pediat, Seattle, WA - USA

• Tipo de documento: Artigo Científico
• Fonte: PEDIATRIC OBESITY; v. 16, n. 4 APR 2021.
• Citações Web of Science: 0

Resumo

Objective Quantitative magnetic resonance imaging (MRI) evidence of mediobasal hypothalamic (MBH) gliosis positively correlates with body mass index (BMI) in adults. This has neither been well explored in children nor have other brain regions involved in appetitive processing been tested for evidence of gliosis. Methods Multi-site cross-sectional study in children to test for differences in quantitative T2 signal (measure of gliosis) by region and to assess relationships with age and BMI. Participants underwent brain MRI using the same equipment and protocol to quantify T2 relaxation time in six bilateral regions of interest (ROIs): putamen, caudate, ventral striatum, amygdala, hippocampus and MBH, and three control regions: white matter, motor cortex and dorsal hypothalamus. Results Thirty-one participants (61% female) were included in a combined sample from the University of Washington (N = 9) and John Hopkins University (N = 22). Mean age was 14 +/- 3 years, and BMIz-score was 0.7 +/- 1.1 (26% with obesity). No study site-related differences were seen in T2 relaxation time across all nine regions (chi(2)(8): 9.46,P= .30). Regional differences in T2 relaxation time were present (P < .001). MBH presented longer T2 relaxation time, suggestive of gliosis, when compared to all regions (P < .001), including an intra-hypothalamic control. Physiological age-related declines in T2 relaxation times were found in grey matter ROIs, but not in the MBH (r= -0.14,P= .46). MBH was the only region with a positive correlation between T2 relaxation time and BMIz-score (r= 0.38,P= .03). Conclusions In a multi-site study, pilot data suggest that quantitative MRI detected normal maturation-related brain variation as well as evidence that MBH gliosis is associated with increased adiposity in children. (AU)

• Processo FAPESP: 17/00657-0 - Influência do diabetes induzido por dieta no desenvolvimento de gliose hipotalâmica em adolescentes com obesidade
• Beneficiário: Leticia Esposito Sewaybricker
• Modalidade de apoio: Bolsas no Exterior - Pesquisa