Brain Glucose Activated MRI Contrast Agent for Early Diagnosis of Alzheimer's Disease.
Anal Chem
; 94(46): 16213-16221, 2022 11 22.
Article
em En
| MEDLINE
| ID: mdl-36367962
ABSTRACT
Brain glucose is an important biomarker of Alzheimer's disease (AD) and has a high specificity especially for early AD. Activatable magnetic resonance imaging (MRI) contrast agents (CAs) serve as a robust technology in the early diagnosis of many diseases; however, there is a lack of glucose-specific MRI CAs. To address this issue, in this work, we synthesized a novel MRI CA (ZIF-8/GOx@MnO2@PEG, ZGMP) that consists of porous zeolitic imidazolate framework-8 (ZIF-8) attached with glucose oxidase (GOx) and modified by MnO2 and PEG. The cascade reaction of brain glucose with ZGMP could result in the production of Mn(II) and an enhanced MRI signal. An early AD mouse model was constructed through injection of the Aß42 oligomer into the parenchyma of mice and utilized to verify the brain glucose activated MRI of ZGMP. The results indicated a higher glucose uptake in early AD mice compared to that in normal mice, with an obviously enhanced T1WI at the region of interest. This work gets rid of the need for a specific scanning sequence for glucose MRI, paving a convenient way for MRI diagnosis of early AD.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Zeolitas
/
Doença de Alzheimer
Tipo de estudo:
Diagnostic_studies
/
Screening_studies
Limite:
Humans
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China