title: Metabolomic pattern analysis after mediterranean diet intervention in a nondiabetic population: a 1- and 3-year follow-up in the PREDIMED study.
abstract: The Mediterranean diet (MD) is considered a dietary pattern with beneficial effects on human health. The aim of this study was to assess the effect of an MD on urinary metabolome by comparing subjects at 1 and 3 years of follow-up, after an MD supplemented with either extra-virgin olive oil (MD + EVOO) or nuts (MD + Nuts), to those on advice to follow a control low-fat diet (LFD). Ninety-eight nondiabetic volunteers were evaluated, using metabolomic approaches, corresponding to MD + EVOO (n = 41), MD + Nuts (n = 27), or LFD (n = 30) groups. The (1)H NMR urinary profiles were examined at baseline and after 1 and 3 years of follow-up. Multivariate data analysis (OSC-PLS-DA and HCA) methods were used to identify the potential biomarker discriminating groups, exhibiting a urinary metabolome separation between MD groups against baseline and LFD. Results revealed that the most prominent hallmarks concerning MD groups were related to the metabolism of carbohydrates (3-hydroxybutyrate, citrate, and cis-aconitate), creatine, creatinine, amino acids (proline, N-acetylglutamine, glycine, branched-chain amino acids, and derived metabolites), lipids (oleic and suberic acids), and microbial cometabolites (phenylacetylglutamine and p-cresol). Otherwise, hippurate, trimethylamine-N-oxide, histidine and derivates (methylhistidines, carnosine, and anserine), and xanthosine were predominant after LFD. The application of NMR-based metabolomics enabled the classification of individuals regarding their dietary pattern and highlights the potential of this approach for evaluating changes in the urinary metabolome at different time points of follow-up in response to specific dietary interventions.
authors.affiliation: Biomarkers & Nutrimetabolomic Lab, Nutrition and Food Science Department, XaRTA, INSA, Campus Torribera, Pharmacy Faculty, University of Barcelona , Barcelona 08028, Spain.
authors.forename: Rosa
authors.initials: R
authors.lastname: Vázquez-Fresno
authors.forename: Rafael
authors.initials: R
authors.lastname: Llorach
authors.forename: Mireia
authors.initials: M
authors.lastname: Urpi-Sarda
authors.forename: Ascension
authors.initials: A
authors.lastname: Lupianez-Barbero
authors.forename: Ramón
authors.initials: R
authors.lastname: Estruch
authors.forename: Dolores
authors.initials: D
authors.lastname: Corella
authors.forename: Montserrat
authors.initials: M
authors.lastname: Fitó
authors.forename: Fernando
authors.initials: F
authors.lastname: Arós
authors.forename: Miguel
authors.initials: M
authors.lastname: Ruiz-Canela
authors.forename: Jordi
authors.initials: J
authors.lastname: Salas-Salvadó
authors.forename: Cristina
authors.initials: C
authors.lastname: Andres-Lacueva
mesh_terms: D000704:Analysis of Variance; D015415:Biomarkers / Q000378:metabolism*; D016000:Cluster Analysis; D038441:Diet, Mediterranean; D019587:Dietary Supplements; D005500:Follow-Up Studies; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D055442:Metabolome / Q000235:genetics / Q000502:physiology*; D055432:Metabolomics / Q000379:methods; D015999:Multivariate Analysis; D009754:Nuts / Q000378:metabolism*; D000069463:Olive Oil / Q000378:metabolism*; D014556:Urine / Q000737:chemistry*
chemical_list: D015415:Biomarkers; D000069463:Olive Oil
keywords: Mediterranean diet; NMR; Nutrimetabolomics; low-fat diet; nuts; olive oil