Temporal changes in milk conjugated linoleic acidfor cows fed a pasture- or conserved-forages-based diet and supplemented with fish oil and sunflower oil

2008 ◽  
Vol 88 (1) ◽  
pp. 123-127
Author(s):  
D. O. Felton ◽  
S. A. Ibrahim ◽  
A. A. AbuGhazaleh
Keyword(s):  
Linoleic Acid ◽  
Fish Oil ◽  
Conjugated Linoleic Acid ◽  
Sunflower Oil ◽  
Milk Fat ◽  
Vaccenic Acid ◽  
Temporal Changes ◽  
Corn Silage ◽  
Forage Fish ◽  
Oil Sunflower

The objective of this experiment was to evaluate the effect of forage source on the temporal changes in milk conjugated linoleic acid (CLA). Fourteen Holstein cows were divided into two groups. One group (LOT) was fed a corn silage-alfalfa hay mix ad libitum, while the other group (PAS) grazed on alfalfa-grass pasture. Additionally, both groups were fed 8.2 kg d-1 grain supplement containing 650 g of oil composed of fish oil and sunflower oil (1:4). The concentration of cis-9, trans-11 CLA in milk fat of both diets reached maximum levels on day 3 of oil supplementation, declined during day 6, and then remained constant during the reminder of the experiment. Milk vaccenic acid (VA) and trans-10 C18:1 reached their maximum concentrations on days 3 and 6, respectively, of oil supplementation with both diets. In conclusion, the decline in milk cis-9, trans-11 CLA over time was not affected by forage source and may have resulted from an increase in formation of trans-10 C18:1 and C18:0 at the expenses of VA. Key words: Conjugated linoleic acid, milk, forage, fish oil, sunflower oil

scholarly journals Evaluating the Conjugated Linoleic Acid and Trans 18:1 Isomers in Milk Fat of Dairy Cows Fed Increasing Amounts of Sunflower Oil and a Constant Level of Fish Oil

2007 ◽  
Vol 90 (8) ◽  
pp. 3786-3801 ◽  
Author(s):  
C. Cruz-Hernandez ◽  
J.K.G. Kramer ◽  
J.J. Kennelly ◽  
D.R. Glimm ◽  
B.M. Sorensen ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Fish Oil ◽  
Dairy Cows ◽  
Conjugated Linoleic Acid ◽  
Sunflower Oil ◽  
Milk Fat ◽  
Constant Level

scholarly journals Influence of Dietary Fish Oil on Conjugated Linoleic Acid and Other Fatty Acids in Milk Fat from Lactating Dairy Cows

2000 ◽  
Vol 83 (11) ◽  
pp. 2620-2628 ◽  
Author(s):  
D.C. Donovan ◽  
D.J. Schingoethe ◽  
R.J. Baer ◽  
J. Ryali ◽  
A.R. Hippen ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Linoleic Acid ◽  
Fish Oil ◽  
Dairy Cows ◽  
Conjugated Linoleic Acid ◽  
Milk Fat ◽  
Lactating Dairy Cows ◽  
Dietary Fish

Obtaining a hydrolyzed milk fat fraction enriched in conjugated linoleic acid and trans-vaccenic acid

2014 ◽  
Vol 36 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Sergio I. Martínez-Monteagudo ◽  
Mohamed Khan ◽  
Feral Temelli ◽  
Marleny D.A. Saldaña
Keyword(s):  
Linoleic Acid ◽  
Conjugated Linoleic Acid ◽  
Milk Fat ◽  
Vaccenic Acid ◽  
Fat Fraction ◽  
Trans Vaccenic Acid

scholarly journals A cis-9,trans-11-conjugated linoleic acid-rich oil reduces the outcome of atherogenic process in hyperlipidemic hamster

2005 ◽  
Vol 289 (2) ◽  
pp. H652-H659 ◽  
Author(s):  
Karine Valeille ◽  
Jacqueline Férézou ◽  
Ghislaine Amsler ◽  
Annie Quignard-Boulangé ◽  
Michel Parquet ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Fish Oil ◽  
Conjugated Linoleic Acid ◽  
Milk Fat ◽  
Oxidized Ldl ◽  
Hdl Cholesterol ◽  
Peroxisome Proliferator ◽  
Butter Oil ◽  
Cholesterol Ratio ◽  
Amyloid A

Conjugated linoleic acid (CLA) mixtures demonstrated antiatherogenic properties in several animal models, including hamsters, but the mechanism of action of the main food-derived CLA isomer is unknown in this species. This study thus focused on cis-9, trans-11-CLA (rumenic acid), and its effect was compared with that of fish oil, which is known to influence several aspects of atherogenesis. Syrian hamsters were fed (for 12 wk) diets containing 20% (wt/wt) butter fat (B diet) or the same diet augmented with either 1% (wt/wt) of a cis-9, trans-11-CLA-rich oil (BR diet) or 1% (wt/wt) fish oil (BF diet). The BR diet induced the lowest aortic lipid deposition (from −30% to −45%) among the butter oil-fed hamsters. In this group, plasma also displayed a reduced non-HDL-to-HDL-cholesterol ratio (21% less than in the butter oil group) and inflammatory serum amyloid A levels (70–80%) and an improvement of anti-oxidized LDL paraoxonase activity (all P < 0.05). Compared with the B group, the beneficial effects of the BR diet could be further explained in part by preventing the high VCAM-1 expression rate, increasing (30%) ATP-binding cassette subfamily A1 expression in the aorta, and downregulating expression of inflammatory-related genes (TNF-α, IL-1β, and cyclooxygenase 2, 2- to 2.8-fold, P < 0.05). This effect was partly associated with an activation of peroxisome proliferator-activating receptor (PPAR)/liver X receptor (LXR)-α signaling cascade. Interestingly, activation of PPAR/LXR-α signaling was not observed in hamsters fed the BF diet, in which the early signs of atherogenesis were increased. In conclusion, this study demonstrated that milk fat-rich cis-9, trans-11-CLA reduces the atherogenic process in hyperlipidemic hamsters.

The effects of fish oil supplementation on rumen metabolism and the biohydrogenation of unsaturated fatty acids in beef steers given diets containing sunflower oil

2005 ◽  
Vol 80 (3) ◽  
pp. 361-367 ◽  
Author(s):  
M. R. F. Lee ◽  
J. K. S. Tweed ◽  
A. P. Moloney ◽  
N. D. Scollan
Keyword(s):  
Fatty Acid ◽  
Linoleic Acid ◽  
Stearic Acid ◽  
Fish Oil ◽  
Sunflower Oil ◽  
Vaccenic Acid ◽  
Ruminal Ph ◽  
Chain Pufa ◽  
N Concentration ◽  
Long Chain

AbstractDuodenally and ruminally fistulated steers were offered grass silage and one of three concentrates at a ratio of 60: 40 (forage: concentrate on a dry-matter basis) : F0, F1 or F4 at 14 g/kg live weight. The concentrates were designed to be iso-lipid and to provide the same amount of sunflower oil but increasing amounts of fish oil : 0, 1 and 4 g per 100 g, respectively. Ruminal characteristics were measured along with fatty acid intakes and duodenal flows to determine the effect of fish oil on : ruminal pH, ammonia-N concentration, volatile fatty acid (VFA) concentration and polyunsaturated fatty acid (PUFA) metabolism. Fish oil had no significant effect on ruminal pH, ammonia-N concentration or the molar proportions of the major VFA, although total VFA concentration was significantly reduced at the highest level of fish oil inclusion. Fish oil significantly increased the flow of long chain PUFA, total conjugated linoleic acid and vaccenic acid to the duodenum and decreased the flow of stearic acid. Biohydrogenation, as determined by the net loss of fatty acid between the mouth and duodenum, of oleic and linolenic acid was not affected by fish oil inclusion and averaged 0·64 and 0·92, respectively. There was a small increase in the biohydrogenation of linoleic acid with increasing fish oil from 0·89 to 0·92 (P< 0·01) on F0 and F4, respectively. Biohydrogenation of the long chain PUFA C20 : 5(n-3) and C22 : 6(n-3) increased from 0·49 and 0·74 to 0·79 and 0·86 (P< 0·01), respectively when fish oil in the concentrate increased from 1 to 4 g per 100 g. The net effect of fish oil on lipid metabolism appears to inhibit the transition of vaccenic acid to stearic acid in the rumen resulting in a build up of this intermediate in the biohydrogenation pathway of C18 PUFA.

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