Imperial College London
Alternate

DrIsabelGarcia Perez

Faculty of Medicine, Department of Metabolism, Digestion and Reproduction

Senior Lecturer in Precision and Systems Medicine
 
 
 
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Contact

 

i.garcia-perez

 
 
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Location

 

101Sir Alexander Fleming BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wilson:2019:jn/nxz138,
author = {Wilson, T and Garcia-Perez, I and Posma, JM and Lloyd, AJ and Chambers, ES and Tailliart, K and Zubair, H and Beckmann, M and Mathers, JC and Holmes, E and Frost, G and Draper, J},
doi = {jn/nxz138},
journal = {Journal of Nutrition},
pages = {1692--1700},
title = {Spot and cumulative urine samples are suitable replacements for 24-hour urine collections for objective measures of dietary exposure in adults using metabolite biomarkers},
url = {http://dx.doi.org/10.1093/jn/nxz138},
volume = {149},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - BACKGROUND: Measurement of multiple food intake exposure biomarkers in urine may offer an objective method for monitoring diet. The potential of spot and cumulative urine samples that have reduced burden on participants as replacements for 24-h urine collections has not been evaluated. OBJECTIVE: The aim of this study was to determine the utility of spot and cumulative urine samples for classifying the metabolic profiles of people according to dietary intake when compared with 24-h urine collections in a controlled dietary intervention study. METHODS: Nineteen healthy individuals (10 male, 9 female, aged 21-65 y, BMI 20-35 kg/m2) each consumed 4 distinctly different diets, each for 1 wk. Spot urine samples were collected ∼2 h post meals on 3 intervention days/wk. Cumulative urine samples were collected daily over 3 separate temporal periods. A 24-h urine collection was created by combining the 3 cumulative urine samples. Urine samples were analyzed with metabolite fingerprinting by both high-resolution flow infusion electrospray mass spectrometry (FIE-HRMS) and proton nuclear magnetic resonance spectroscopy (1H-NMR). Concentrations of dietary intake biomarkers were measured with liquid chromatography triple quadrupole mass spectrometry and by integration of 1H-NMR data. RESULTS: Cross-validation modeling with 1H-NMR and FIE-HRMS data demonstrated the power of spot and cumulative urine samples in predicting dietary patterns in 24-h urine collections. Particularly, there was no significant loss of information when post-dinner (PD) spot or overnight cumulative samples were substituted for 24-h urine collections (classification accuracies of 0.891 and 0.938, respectively). Quantitative analysis of urine samples also demonstrated the relation between PD spot samples and 24-h urines for dietary exposure biomarkers. CONCLUSIONS: We conclude that PD spot urine samples are suitable replacements for 24-h urine collections. Alternatively, cumulative samples collected overn
AU  - Wilson,T
AU  - Garcia-Perez,I
AU  - Posma,JM
AU  - Lloyd,AJ
AU  - Chambers,ES
AU  - Tailliart,K
AU  - Zubair,H
AU  - Beckmann,M
AU  - Mathers,JC
AU  - Holmes,E
AU  - Frost,G
AU  - Draper,J
DO  - jn/nxz138
EP  - 1700
PY  - 2019///
SN  - 0022-3166
SP  - 1692
TI  - Spot and cumulative urine samples are suitable replacements for 24-hour urine collections for objective measures of dietary exposure in adults using metabolite biomarkers
T2  - Journal of Nutrition
UR  - http://dx.doi.org/10.1093/jn/nxz138
UR  - https://www.ncbi.nlm.nih.gov/pubmed/31240300
UR  - http://hdl.handle.net/10044/1/71028
VL  - 149
ER  -
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