Serum Uric Acid, Alzheimer-Related Brain Changes, and Cognitive Impairment.

Abstract:

Background:Despite known associations of lower serum uric acid (UA) with Alzheimer's disease (AD) dementia or AD-related cognitive impairment, little is known regarding the underlying patho-mechanisms. We aimed to examine the relationships of serum UA with in vivo AD pathologies including cerebral beta-amyloid (Aβ) and tau deposition, AD-signature region cerebral glucose metabolism (AD-CM), and white matter hyperintensities (WMH). We also investigated the association between serum UA and cognitive performance, and then assessed whether such an association is mediated by the brain pathologies. Methods:A total of 430 non-demented older adults underwent comprehensive clinical assessments, measurement of serum UA level, and multimodal brain imaging, including Pittsburgh compound B-positron emission tomography (PET), AV-1451 PET, fluorodeoxyglucose (FDG)-PET, and magnetic resonance imaging scans. Mini-Mental State Examination (MMSE) and word list recall (WLR) test scores were used to measure cognitive performance. Results:Serum UA level was significantly associated with AD-CM, but not with Aβ deposition, tau deposition, or WMH volume. Serum UA levels also had significant association with WLR and marginal association with MMSE; such associations disappeared when AD-CM was controlled as a covariate, indicating that AD-CM has a mediating effect. Conclusion:The findings of the present study indicate that there is an association of low serum UA with AD-related cerebral hypometabolism, and whether this represents a causal relationship remains to be determined.

journal_name

Front Aging Neurosci

authors

Kim JW,Byun MS,Yi D,Lee JH,Jeon SY,Ko K,Jung G,Lee HN,Lee JY,Sohn CH,Lee YS,Shin SA,Kim YK,Lee DY,KBASE Research Group.

doi

10.3389/fnagi.2020.00160

subject

Has Abstract

pub_date

2020-06-05 00:00:00

pages

160

issn

1663-4365

journal_volume

12

pub_type

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