Higher Body Mass Index Is Associated with Lower Cortical Amyloid-ß Burden in Cognitively Normal Individuals in Late-Life.
J Alzheimers Dis
; 69(3): 817-827, 2019.
Article
em En
| MEDLINE
| ID: mdl-31156169
ABSTRACT
BACKGROUND:
Both low and high body mass index (BMI) have been associated with an increased risk of dementia, including that caused by Alzheimer's disease (AD). Specifically, high middle-age BMI or a low late-age BMI has been considered a predictor for the development of AD dementia. Less studied is the relationship between BMI and AD pathology.OBJECTIVE:
We explored the association between BMI and cortical amyloid-ß (Aß) burden in cognitively normal participants that were either in mid-life (45-60 years) or late-life (>60).METHODS:
We analyzed cross-sectional baseline data from the Knight Alzheimer Disease Research Center (ADRC) at Washington University. Aß pathology was measured in 373 individuals with Aß PET imaging and was quantified using Centiloid units. We split the cohort into mid- and late-life groups for analyses (nâ=â96 and nâ=â277, respectively). We ran general linear regression models to predict Aß levels from BMI while controlling for age, sex, years of education, and APOE4 status. Analyses were also conducted to test the interaction between BMI and APOE4 genotype and between BMI and sex.RESULTS:
Higher BMI was associated with lower cortical Aß burden in late-life (ß=â-0.81, pâ=â0.0066), but no relationship was found in mid-life (ß=â0.04, pâ>â0.5). The BMI×APOE4+ and BMI×male interaction terms were not significant in the mid-life (ß=â0.28, pâ=â0.41; ß=â0.64, pâ=â0.13) or the late-life (ß=â0.17, pâ>â0.5; ß=â0.50, pâ=â0.43) groups.CONCLUSION:
Higher late-life BMI is associated with lower cortical Aß burden in cognitively normal individuals.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Índice de Massa Corporal
/
Córtex Cerebral
/
Peptídeos beta-Amiloides
Tipo de estudo:
Observational_studies
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Prevalence_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Alzheimers Dis
Assunto da revista:
GERIATRIA
/
NEUROLOGIA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Estados Unidos