Incorporation of n-3 fatty acids of fish oil into tissue and serum lipids of ruminants

• Published in: Lipids Vol. 27; no. 8; pp. 629 - 631
• Main Authors: Ashes, J.R. (CSIRO, Prospect, N.S.W.), Siebert, B.D, Gulati, S.K, Cuthbertson, A.Z, Scott, T.W
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer‐Verlag 01.08.1992; Springer
• Subjects: ACEITES DE PESCADO; ACIDE GRAS INSATURE; ACIDOS GRASOS INSATURADOS; Adipose Tissue - metabolism; ADIPOSE TISSUES; Analytical, structural and metabolic biochemistry; ANIMAL PHYSIOLOGY; Animals; Bacteria - metabolism; biohydrogenation; Biological and medical sciences; BOEUF; BUEY; BULLOCKS; CARNERO; Cattle - metabolism; docosahexaenoic acid; EICOSAPENTAENOIC ACID; Fatty acids; Fatty Acids, Omega-3 - blood; Fatty Acids, Omega-3 - metabolism; FISH OILS; Fish Oils - metabolism; FISIOLOGIA ANIMAL; Fundamental and applied biological sciences. Psychology; HIDROGENACION; HUILE DE POISSON; HYDROGENATION; Linoleic Acid; Linoleic Acids - metabolism; Lipid Metabolism; Lipids; Lipids - blood; LIPOLISIS; LIPOLYSE; LIPOLYSIS; MICROORGANISME; MICROORGANISMOS; MICROORGANISMS; MOUTON; MUSCLE; MUSCLES; Muscles - metabolism; MUSCULOS; Oleic Acid; Oleic Acids - metabolism; Other biological molecules; Phospholipids - metabolism; PHYSIOLOGIE ANIMALE; Plant Oils - metabolism; POLYENOIC FATTY ACIDS; RUMEN; Rumen - microbiology; Sheep - metabolism; Stearic Acids - metabolism; STEERS; Sunflower Oil; TEJIDO ADIPOSO; TISSU ADIPEUX; Triglycerides - metabolism; UNSATURATED FATTY ACIDS; WETHERS; Thin layer chromatography; Gas chromatography; Composition; Polyunsaturated fatty acid; Phospholipid; Livestock; Muscle; Microorganism; Detection; Hydrogenation; Feeding
• ISSN: 0024-4201; 1558-9307
• DOI: 10.1007/BF02536122

This study examines the biohydrogenation and utilization of the C20 and C22 polyenoic fatty acids in ruminants. Eicosapentaenoic (20∶5n−3) and docosahexaenoic (22∶6n−3) acids were not biohydrogenated to any significant extent by rumen microorganisms, whereas C18 polyenoic fatty acids were extensively hydrogenated. The feeding of protected fish oil increased the proportion of 20∶5 from 1% to 13–18% and 22∶6 from 2% to 7–9% in serum lipids and there were reductions in the proportion of stearic (18∶0) and linoleic (18∶2) acids. The proportion of 20∶5 in muscle phospholipids (PL) increased from 1.5% to 14.7% and 22∶6 from 1.0% to 4.2%; these acids were not incorporated into muscle or adipose tissue triacylglycerols (TAG). In the total PL of muscle, the incorporated 20∶5 and 22∶6 substituted primarily for oleic (18∶1) and/or linoleic (18∶2) acid, and there was no consistent change in the porportion of arachidonic (20∶4) acid.