Abstract
Pasture intake is a major factor affecting the content and the distribution of the conjugated linoleic acid (CLA) isomers in bovine milk fat. The aim of this study was to determine the CLA contents and its isomeric distribution in milk, cheese and butter from Azores, a Portuguese archipelago in the Atlantic Ocean. The CLA isomers were analysed using Ag+-HPLC with three silver ion columns in series. Butter was the richest product in CLA, with a total of 6.58–7.72 mg·g−1, whereas cheese presented the highest specific CLA content (12.40–14.00 mg·g−1 fat). The CLA isomeric distribution showed a clear predominance of the bioactive cis-9, trans-11 isomer (from 72.26% to 82.59%). The trans-11, cis-13 CLA isomer, a useful indicator of pasture-fed cow’s milk, varied from 2.22% to 3.91%. In conclusion, the Azorean dairy products have a relatively high amount of CLA, especially the cis-9, trans-11 isomer, constituting therefore a good source of these compounds for the human diet.
Abstract
(CLA) 3 Ag+- CLA CLA (6.58–7.72 mg·g−1), CLA (12.40–14.00 mg·g−1) cis-9, trans-11 (72.26% ∼ 82.59%) CLA trans-11, cis-13 CLA 2.22% ∼ 3.91% CLA, cis-9, trans-11
Résumé
L’ingestion de pâture est le principal facteur qui affecte la concentration et la distribution des isomères de l’acide linoléique conjugué (CLA) de la matière grasse du lait bovin. L’objectif de cette étude était de déterminer la teneur en CLA et la distribution de ses isomères dans le lait, le fromage et le beurre des Açores, un archipel Portugais de l’Océan Atlantique. Les isomères de CLA ont été analysés par Ag+-HPLC, utilisant trois colonnes ioniques argentées, en série. Le beurre était le produit le plus riche en CLA, avec un total de 6,58–7,72 mg·g−1, tandis que le fromage présentait la plus grande teneur spécifique en CLA (12,40–14,00 mg·g−1 matière grasse). La distribution des isomères de CLA a montré une nette prédominance de l’isomère bioactif cis-9, trans-11 (de 72,26 à 82,59 %). La teneur en isomère trans-11, cis-13, indicateur de l’ingestion de pâture par les vaches, variait de 2,22 à 3,91 %. En conclusion, les produits laitiers des Açores ont une teneur relativement élevée en CLA, et particulièrement en isomère cis-9, trans-11, constituant ainsi une bonne source de ces composés pour l’alimentation humaine.
Similar content being viewed by others
References
Alfaia C., Quaresma M., Castro M., Martins S., Portugal A., Fontes C., Bessa R., Prates J., Fatty acid composition, including isomeric profile of conjugated linoleic acid, and cholesterol in Mertolenga-PDO beef, J. Sci. Food Agric. 86 (2006) 2196–2205.
Banni S., Carta G., Contini M.S., Angioni E., Deiana M., Dessi M.A., Melis M.P., Corongiu F.P., Characterization of conjugated diene fatty acids in milk and dairy products, and lamb tissues, J. Nutr. Biochem. 7 (1996) 150–155.
Belury M.A., Dietary conjugated linoleic acid in health: physiological effects and mechanisms of action, Annu. Rev. Nutr. 22 (2002) 505–531.
Collomb M., Schimd A., Sieber R., Wechsler D., Ryhänen E., Conjugated linoleic acid in milk fat: variation and physiological effects, Int. Dairy J. 16 (2006) 1347–1361.
Corl B.A., Baumgard L.H., Griinari J.M., Delmonte P., Morehouse K.M., Yurawecz M.P., Trans-7, cis-9 CLA is synthesized endogenously by Δ9-desaturase in dairy cows, Lipids 37 (2002) 681–688.
Cruz-Hernandez C., Deng Z., Zhou J., Hill A.R., Yurawecz M.P., Delmonte P., Mossoba M.M., Dugan M.E., Kramer J.K., Methods for analysis of conjugated linoleic acids and trans-18:1 isomers in dairy fats by using a combination of gas chromatography, silver-ion thin-layer chromatography/gas chromatography, and silver-ion liquid chromatography, J. AOAC Int. 87 (2004) 545–562.
Dannenberger D., Nuernberg K., Nuernberg G., Scollan N., Steinhart H., Ender K., Effect of pasture vs. concentrate diet on CLA isomer distribution in different tissue lipids of beef cattle, Lipids 40 (2005) 589–598.
Destaillats F., Angers P., Directed sequential synthesis of conjugated linoleic acid isomers from d7,9 to d12,14, Eur. J. Lipid Sci. Technol. 105 (2003) 3–8.
ES ISO 5508, Animal and Vegetable Fats and Oils — Analysis by Gas Chromatography of Methyl Esters of Fatty Acids, European Standard ISO 5508, European Committee for Standardization, Brussels, Belgium, 1990.
Fritsche J., Steinhart H., Analysis, occurrence, and physiological properties of trans fatty acid (TFA) with particular emphasis on conjugated linoleic acid isomers (CLA): a review, Fett/Lipid 100 (1998) 190–210.
Griinari J.M., Chouinard P.Y., Bauman D.E., Trans fatty acid hypothesis of milk fat depression revised, in: Proceedings of the Cornell Nutrition Conference for Feed Manufacturers, Cornell University, Ithaca, NY, USA, 1997, pp. 28–216.
Jahreis G., Fritsche J., Kraft J., Species-dependent, seasonal, and dietary variation of conjugated linoleic acid in milk, in: Yurawecz M.P., Mossoba M.M., Kramer J.K.G., Pariza M.W., Nelson G.J. (Eds.), Advances in Conjugated Linoleic Acid Research, vol. 1, AOCS Press, Champaign, IL, USA, 1999, pp. 215–225.
Kraft J., Collomb M., Möckel P., Sieber R., Jahreis G., Differences in CLA isomer distribution of cow’s milk, Lipids 38 (2003) 657–664.
Lavillonnière F., Martin J.C., Bougnoux P., Sébédio J.L., Analysis of conjugated linoleic acid isomers and content in French cheeses, J. Am. Oil Chem. Soc. 75 (1998) 343–352.
Leite J., Lima E., Baptista J., Azorean bovine milk conjugated linoleic acid. Effect of green pasture diet, storage and processing temperature, Lait 87 (2007) 167–179.
Luna P., De la Fuente M.A., Juárez M., Conjugated linoleic acid in processed cheeses during the manufacturing stages, J. Agric. Food Chem. 53 (2005) 2690–2695.
Martins S.V., Lopes P.A., Alfaia C.M., Ribeiro V.S., Guerreiro T.V., Fontes C., Castro M.F., Soveral G., Prates J.A., Contents of conjugated linoleic acid in ruminant — derived foods and estimation of their contribution to daily intake in Portugal, Br. J. Nutr. 98 (2007) 1206–1213.
NP 2283, Manteiga — Determinação dos teores de água, de resíduo seco isento de matéria gorda e de matéria gorda, Direcção Geral da Qualidade, Lisboa, Portugal, 1984.
Prates J.A., Mateus C., Functional foods from animal sources and their physiologically active components, Rev. Med. Vet.-Toulouse 153 (2002) 155–160.
Precht D., Molkentin J., Effect of feeding on conjugated cis Δ9, trans Δ11-octadecadienoic acid and other isomers of linoleic acid in bovine milk fats, Nahrung 41 (1997) 330–335.
Precht D., Molkentin J., Frequency distribution of conjugated linoleic acid and trans fatty acid content in European bovine milk fats, Milchwissenschaft 55 (2000) 687–691.
Rickert R., Steinhart H., Fristche J., Sehat J., Yurawecz M.P., Mossoba M.M., Roach J.A.G., Eulitz K., Ku Y., Kramer J.K.G., Enhanced resolution of conjugated linoleic acid isomers by tandem-column silverion high performance liquid chromatography, J. High Resolut. Chrom. 22 (1999) 144–148.
Statistical Analysis System, SAS/STAT 9.1 User’s Guide, SAS Institute Inc., Cary, NC, USA, 2004.
Wahle K.W., Heys S.D., Rotondo D., Conjugated linoleic acids: are they beneficial or detrimental to health?, Prog. Lipid Res. 43 (2004) 553–587.
Ward A.T., Wittenberg K.M., Froebe H.M., Przybylski R., Malcolmson L., Fresh forage and solin supplementation on conjugated linoleic acid levels in plasma and milk, J. Dairy Sci. 86 (2003) 1742–1750.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Pestana, J.M., Martins, S.I.V., Alfaia, C.M.M. et al. Content and distribution of conjugated linoleic acid isomers in bovine milk, cheese and butter from Azores. Dairy Sci. Technol. 89, 193–200 (2009). https://doi.org/10.1051/dst/2008040
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1051/dst/2008040