Urine dicarboxylic acids change in pre-symptomatic Alzheimer's disease and reflect loss of energy capacity and hippocampal volume.
Aged
Aged, 80 and over
Alzheimer Disease
/ diagnosis
Amyloid beta-Peptides
/ cerebrospinal fluid
Asymptomatic Diseases
Biomarkers
/ cerebrospinal fluid
Cognitive Dysfunction
/ diagnosis
Dicarboxylic Acids
/ chemistry
Female
Gas Chromatography-Mass Spectrometry
Hippocampus
/ pathology
Humans
Magnetic Resonance Imaging
Male
Multivariate Analysis
Risk Factors
tau Proteins
/ cerebrospinal fluid
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2020
2020
Historique:
received:
18
09
2019
accepted:
31
03
2020
entrez:
17
4
2020
pubmed:
17
4
2020
medline:
4
8
2020
Statut:
epublish
Résumé
Non-invasive biomarkers will enable widespread screening and early diagnosis of Alzheimer's disease (AD). We hypothesized that the considerable loss of brain tissue in AD will result in detection of brain lipid components in urine, and that these will change in concert with CSF and brain biomarkers of AD. We examined urine dicarboxylic acids (DCA) of carbon length 3-10 to reflect products of oxidative damage and energy generation or balance that may account for changes in brain function in AD. Mean C4-C5 DCAs were lower and mean C7-C10 DCAs were higher in the urine from AD compared to cognitively healthy (CH) individuals. Moreover, mean C4-C5 DCAs were lower and mean C7-C9 were higher in urine from CH individuals with abnormal compared to normal CSF amyloid and Tau levels; i.e., the apparent urine changes in AD also appeared to be present in CH individuals that have CSF risk factors of early AD pathology. In examining the relationship between urine DCAs and AD biomarkers, we found short chain DCAs positively correlated with CSF Aβ42, while C7-C10 DCAs negatively correlated with CSF Aβ42 and positively correlated with CSF Tau levels. Furthermore, we found a negative correlation of C7-C10 DCAs with hippocampal volume (p < 0.01), which was not found in the occipital volume. Urine measures of DCAs have an 82% ability to predict cognitively healthy participants with normal CSF amyloid/Tau. These data suggest that urine measures of increased lipoxidation and dysfunctional energy balance reflect early AD pathology from brain and CSF biomarkers. Measures of urine DCAs may contribute to personalized healthcare by indicating AD pathology and may be utilized to explore population wellness or monitor the efficacy of therapies in clinical trials.
Identifiants
pubmed: 32298384
doi: 10.1371/journal.pone.0231765
pii: PONE-D-19-26326
pmc: PMC7162508
doi:
Substances chimiques
Amyloid beta-Peptides
0
Biomarkers
0
Dicarboxylic Acids
0
tau Proteins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0231765Déclaration de conflit d'intérêts
JMP is employed by and receives salary from Cipher Biostatistics & Reporting. The analysis by our consultant (JMP) from Cipher Biostatistics & Reporting does not alter our adherence to PLOS ONE policies on sharing data and materials.
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