Effect of feeding fat to dairy cows receiving a fat-deficient basal diet: II. Fatty acid composition of the milk fat

Banks, W.; Clapperton, J. L.; Ferrie, Morag E.

doi:10.1017/s0022029900015776

Cited by 54 publications

(21 citation statements)

References 16 publications

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“…Milk palmitic acid was increased from 36.4% in controls to 49.8% of all fatty acids in palmitic acid treated cows. Banks et al (1976b) also observed decreases in short-and medium-chain fatty acids in milk (6:0 to 14:0), with increases observed in concentrations of palmitic, palmitoleic, and oleic acids.…”

mentioning

confidence: 64%

Effect of Varying Levels of Fatty Acids from Palm Oil on Feed Intake and Milk Production in Holstein Cows

Mosley

Hatch

et al. 2007

Journal of Dairy Science

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To determine the optimum feeding level of fatty acids of palm oil (PALM; Energizer RP10; 86.6% palmitic acid) on milk production, lactating cows (n = 18) were randomly assigned to a treatment sequence in replicated 4 x 4 Latin squares. Animals were assigned to squares by parity (3 multiparous and 1 primiparous squares with primiparous in the incomplete square). The 4 diets were designed to provide 0, 500, 1,000, and 1,500 g of PALM per day. Cows were fed individually with feed intake measured daily. Each period lasted 16 d with milk production and composition determined the final 2 d. Milk production, milk composition and feed intake data were analyzed using the MIXED procedure of SAS. Milk yields were 30.9, 34.0, 34.2, and 34.2 kg/ d (SEM = 1.9) for the 0, 500, 1,000, and 1,500 g levels, respectively. Milk yield was increased by the addition of PALM; however, there were no differences among the levels of PALM. Milk fat percentage was also increased from 3.44% for 0 g to 3.95% (SEM = 0.17) across all levels of PALM but there were no differences among the PALM treatments. Dry matter intakes were 23.3, 26.4, 24.7, and 23.8 kg/d (SEM = 1.4) for the 0, 500, 1,000 and 1,500 g levels, respectively. The addition of PALM increased milk yield and milk fat percentage, and no adverse effects on dry matter intake were observed.

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confidence: 64%

Effect of Varying Levels of Fatty Acids from Palm Oil on Feed Intake and Milk Production in Holstein Cows

Mosley

Hatch

et al. 2007

Journal of Dairy Science

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“…Kadegowda et al (2009) demonstrated that the role of PPARG and long-chain fatty acids (LCFA) in regulating milk fat synthesis. Studies indicated that LCFA significantly suppressed de novo synthesis of SMCFA (Banks et al, 1976; Jenkins, 1999; Warntjes et al, 2008) and inhibited ACACA and FASN mRNA expression (Kadegowda et al, 2009). Therefore, the expression of genes involved in de novo synthesis of FA could probably be regulated by PPARG, and further affected the synthesis of milk fat.…”

Section: Introductionmentioning

confidence: 99%

Effects of Saturated Long-chain Fatty Acid on mRNA Expression of Genes Associated with Milk Fat and Protein Biosynthesis in Bovine Mammary Epithelial Cells

LiZhi¹,

Yan²,

Sheng³

et al. 2014

Asian Australas. J. Anim. Sci

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This study was conducted to determine the effects of saturated long-chain fatty acids (LCFA) on cell proliferation and triacylglycerol (TAG) content, as well as mRNA expression of αs1-casein (CSN1S1) and genes associated with lipid and protein synthesis in bovine mammary epithelial cells (BMECs). Primary cells were isolated from the mammary glands of Holstein dairy cows, and were passaged twice. Then cells were cultured with different levels of palmitate or stearate (0, 200, 300, 400, 500, and 600 μM) for 48 h and fetal bovine serum in the culture solution was replaced with fatty acid-free BSA (1 g/L). The results showed that cell proliferation tended to be increased quadratically with increasing addition of stearate. Treatments with palmitate or stearate induced an increase in TAG contents at 0 to 600 μM in a concentration-dependent manner, and the addition of 600 μM was less effective in improving TAG accumulation. The expression of acetyl-coenzyme A carboxylase alpha, fatty acid synthase and fatty acid-binding protein 3 was inhibited when palmitate or stearate were added in culture medium, whereas cluster of differentiation 36 and CSN1S1 mRNA abundance was increased in a concentration-dependent manner. The mRNA expressions of peroxisome proliferator-activated receptor gamma, mammalian target of rapamycin and signal transducer and activator of transcription 5 with palmitate or stearate had no significant differences relative to the control. These results implied that certain concentrations of saturated LCFA could stimulate cell proliferation and the accumulation of TAG, whereas a reduction may occur with the addition of an overdose of saturated LCFA. Saturated LCFA could up-regulate CSN1S1 mRNA abundance, but further studies are necessary to elucidate the mechanism for regulating milk fat and protein synthesis.

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“…Fats that escape biohydrogenation in tf,e rumen can increase the supply of unsaturated fatty acids to milk (Clapperton et al 1980). If rhe long-chain fatty acids are relatively saturated, the C1s.s fatty acid can be desaturated to C1s 1 (Banks et al 1976). …”

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confidence: 99%

Influence of dietary fat source on oxidative stability and fatty acid composition of milk from cows receiving a low or high level of dietary vitamin E

Charmley¹,

Nicholson²

1994

Can. J. Anim. Sci.

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fournissant aux graines une q-uantit6 €quivalente de graisse. Les p6riodes exp6rimentales duraient six semaines et chaque vache recevait 6 000 UI d'ac6tate de dl-a-tocoph6ryl danJes deux dernidres semaines de chaque p6riode. Le rendement ainsi que Ia composition et la saveur du lait €taient rn"ru.6, d la fin de la quatridme et de la sixidme semaine. L'administration de SCAG abaiisait (P = 0,0@1) Ia prise alimentaire (matidre sdche) mais lei r6gimes compldment6s fournissaient plus de EN' qle le regime non compl6ment6 (p = b,OSS). Le rendement en lait, en m.g. et en 6nergie 6tait augment6 par la compl6mentation lipidique soit respectivement P < 0,00L, P < 0,001 etP : 0,003. Le rendement en prot6ine 6tait abaiss6 chez les vaches recevant SCAG' Le r6gihe compl6ment6 aux graines de soja provoquait une diminution de la concentration lipidique du lait, mais seulement avant administration de vitamine EI Ce m6me iegi.. aicroissait les teneurs en cr-tocoph6rol du lait (P < 0'05). Le lait des vaches nourries aux graines de soja 6tait particulidiement sensible )r I'oxydation (P < 0,01). L'intensit6 du go0t d'oxydation 6tait-Ia m6me avant ei pendant I'administration de vitamine E. L'apport d'un compl6ment de graisse abaissait la proportion d9s-acidjs gras ir chaine courte et ir chaine moyenne (P < 0,001) et accroissait celle des acides gras en.Cl8_dans le lait (P < 0'001)' La lroportion des acides gras polyinsatur6s dans le lait 6tait augment€e par la distribution des graines de soja, mais pas par I'adjonciion de SCAG. Le sofa g.uin!. entibres peut dchapper a U UiotryOiog6nation dans le rumen, et ainsi rendre le lait sensible h

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Effect of feeding fat to dairy cows receiving a fat-deficient basal diet: II. Fatty acid composition of the milk fat

Cited by 54 publications

References 16 publications

Effect of Varying Levels of Fatty Acids from Palm Oil on Feed Intake and Milk Production in Holstein Cows

Effect of Varying Levels of Fatty Acids from Palm Oil on Feed Intake and Milk Production in Holstein Cows

Effects of Saturated Long-chain Fatty Acid on mRNA Expression of Genes Associated with Milk Fat and Protein Biosynthesis in Bovine Mammary Epithelial Cells

Influence of dietary fat source on oxidative stability and fatty acid composition of milk from cows receiving a low or high level of dietary vitamin E

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