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Title: NMR-Based Μetabolomics of the Lipid Fraction of Organic and Conventional Bovine Milk
Authors: Tsiafoulis, Constantinos G. 
Papaemmanouil, Christina 
Alivertis, Dimitrios 
Tzamaloukas, Ouranios 
Miltiadou, Despoina 
Balayssac, Stéphane 
Malet-Martino, Myriam 
Gerothanassis, Ioannis P. 
Keywords: Metabolic profile;NMR;Organic milk;CLA;UFA;1D TOCSY
Category: Animal and Dairy Science
Field: Agricultural Sciences
Issue Date: 18-Mar-2019
Source: Molecules, 2019, Volume 24, Issue 6, Article number 1067
Journal: Molecules 
Abstract: Origin and quality identification in dairy products is an important issue and also an extremely challenging and complex experimental procedure. The objective of the present work was to compare the metabolite profile of the lipid fraction of organic and conventional bovine milk using NMR metabolomics analysis. ¹H-NMR and 1D TOCSY NMR methods of analysis were performed on extracted lipid fraction of lyophilized milk. For this purpose, 14 organic and 16 conventional retail milk samples were collected monthly, and 64 bulk-tank (58 conventional and 6 organics) milk samples were collected over a 14-month longitudinal study in Cyprus. Data were treated with multivariate methods (PCA, PLS-DA). Minor components were identified and quantified, and modification of the currently used equations is proposed. A significantly increased % content of conjugated (9-cis, 11-trans)18:2 linoleic acid (CLA), α-linolenic acid, linoleic acid, allylic protons and total unsaturated fatty acids (UFA) and decreased % content for caproleic acid were observed in the organic samples compared to the conventional ones. The present work confirms that lipid profile is affected by contrasting management system (organic vs. conventional), and supports the potential of NMR-based metabolomics for the rapid analysis and authentication of the milk from its lipid profile.
ISSN: 1420-3049
DOI: 10.3390/molecules24061067
Rights: © 2019 by the authors.
Type: Article
Appears in Collections:Άρθρα/Articles

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