Olfactory Function and Markers of Brain Pathology in Non-Demented Individuals with Autosomal Dominant Alzheimer's Disease.
J Alzheimers Dis
; 88(2): 721-729, 2022.
Article
em En
| MEDLINE
| ID: mdl-35694921
ABSTRACT
BACKGROUND:
Olfactory dysfunction is one of the earliest signs of Alzheimer's disease (AD), highlighting its potential use as a biomarker for early detection. It has also been linked to progression from mild cognitive impairment (MCI) to dementia.OBJECTIVE:
To study olfactory function and its associations with markers of AD brain pathology in non-demented mutation carriers of an autosomal dominant AD (ADAD) mutation and non-carrier family members.METHODS:
We analyzed cross-sectional data from 16 non-demented carriers of the Presenilin1 E280A ADAD mutation (mean age [SD] 40.1 [5.3], and 19 non-carrier family members (mean age [SD] 36.0 [5.5]) from Colombia, who completed olfactory and cognitive testing and underwent amyloid and tau positron emission tomography (PET) imaging.RESULTS:
Worse olfactory identification performance was associated with greater age in mutation carriers (râ=â-0.52 pâ=â0.037). In carriers, worse olfactory identification performance was related to worse MMSE scores (râ=â0.55, pâ=â0.024) and CERAD delayed recall (râ=â0.63, pâ=â0.007) and greater cortical amyloid-ß (râ=â-0.53, pâ=â0.042) and tau pathology burden (entorhinal râ=â-0.59, pâ=â0.016; inferior temporal râ=â-0.52, pâ=â0.038).CONCLUSION:
Worse performance on olfactory identification tasks was associated with greater age, a proxy for disease progression in this genetically vulnerable ADAD cohort. In addition, this is the first study to report olfactory dysfunction in ADAD mutation carriers with diagnosis of MCI and its correlation with abnormal accumulation of tau pathology in the entorhinal region. Taken together, our findings suggest that olfactory dysfunction has promise as an early marker of brain pathology and future risk for dementia.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doença de Alzheimer
/
Disfunção Cognitiva
/
Transtornos do Olfato
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
/
Screening_studies
Limite:
Humans
Idioma:
En
Revista:
J Alzheimers Dis
Assunto da revista:
GERIATRIA
/
NEUROLOGIA
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos