Influence of Dietary Fat on Rumen Fatty Acids, Plasma Lipid and Milk Fat Composition in the Cow

Macleod, G.K.; Wood, A. S.; Yao, Yuchang

doi:10.3168/jds.s0022-0302(72)85514-0

Cited by 23 publications

(21 citation statements)

References 20 publications

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“…Feeding MIX also increased cis9-18:1 and 18:2n-6 intake by 253 and 152 g·d -1 compared with NOS. Fatty acid intakes in this study were comparable with those indicated in previous reports concerning high-oleic or high-linoleic oil fed to lactating cows [19,35,37].…”

Section: Resultssupporting

confidence: 80%

“…When soybean oil was fed to dairy cows [19] the proportion of 18:2n-6 in the PL and CE fractions increased. Stearic acid concentration, however, was higher in the triglyceride (TG) fraction.…”

Section: Introductionmentioning

confidence: 99%

“…Although several studies have previously evaluated fatty acid composition in selected plasma lipid fractions due to feeding lipid supplements to lactating dairy cows none, to our knowledge, reported responses in trans11-18:1 and cis9,trans11-18:2 systematically. Lipid fractions in ruminant plasma have traditionally been isolated using thin-layer chromatography [17,19,21,26,28]. This procedure, however, is relatively slow, may result in oxidation of polyunsaturated fatty acids due to extensive exposure to air, and produces low lipid recoveries [13,22].…”

Section: Introductionmentioning

confidence: 99%

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Distribution of trans-vaccenic acid and cis9, trans11-conjugated linoleic acid (rumenic acid) in blood plasma lipid fractions and secretion in milk fat of Jersey cows fed canola or soybean oil

et al. 2002

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-To determine fatty acid distribution in lipid fractions of bovine blood plasma, 24 multiparous Jersey cows at peak lactation were fed a control diet (no supplemental oil, NOS) or the control diet supplemented at 35 g·kg -1 dry matter with canola oil (CAN), soybean oil (SOY), or a mixture of equal amounts of canola and soybean oil (MIX) for 4 wk. Plasma lipid fractions were isolated with aminopropyl columns. Fatty acid concentration in the phospholipid (PL), cholesterol ester (CE), and triglyceride (TG) fractions of plasma from cows fed supplemental oil was 142 (+47%), 144 (+57%), and 26 (+72%) µg·mL -1 greater than those of the control group. Oleic acid increased from 153 to 195, 100 to 151, 35 to 53, and 103 to 161 mg·g -1 of total fatty acids in the free fatty acid (FFA), PL, CE, and TG fractions, respectively, when CAN-fed cows were compared with NOS. In contrast, SOY intake increased 18:2n-6 in FFA, PL, CE, and TG fractions from 37 to 55, 327 to 366, 684 to 744, and 42 to 72 mg·g -1 , respectively. In the TG fraction, feeding SOY also increased trans11-18:1 from 40 to 105 mg·g -1 and cis9,trans11-18:2 from 1 to 12 mg·g -1 . Concentration and yield of trans11-18:1 in milk fat were 21 mg·g -1 and 13.7 g·d -1 when feeding NOS, and increased to 45 mg·g -1 and 43.1 g·d -1 in response to SOY. Similarly, concentration and yield of cis9,trans11-18:2 were 5 mg·g -1 and 7.3 g·d -1 , and increased to 13 mg·g -1 and 11.2 g·d -1 in response to SOY. Concentrations of trans-isomers in blood plasma and milk fat ranked by treatment reflected linoleic acid intakes, and were greater in SOY-fed cows compared with NOS or CAN-fed cows. Plasma lipid fractions can be used to appraise incomplete biohydrogenation of unsaturated fatty acids in the rumen.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Distribution of trans-vaccenic acid and cis9, trans11-conjugated linoleic acid (rumenic acid) in blood plasma lipid fractions and secretion in milk fat of Jersey cows fed canola or soybean oil

et al. 2002

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“…Chilliard et al (1991) described the secretion of milk fat in the presence of unsaturated fatty acids as a balance between mammary de novo synthesis and the incorporation of exogenous fatty acids of both adipose tissue and dietary origin. MacLeod et al (1972) fed (A) a standard diet, (B) a lowfat basal diet, (C) the basal plus hydrogenated tallow, and (D) the basal diet plus soybean oil. Intake of C 18:2 was 277, 102, 182, and 330 g d -1 for diets A to D, respectively, and transfer into milk was 2.9, 6.9, 3.8, and 3.3% of intake, respectively.…”

mentioning

confidence: 99%

Apparent transfer efficiency of docosahexaenoic acid from diet to milk in dairy cows

Wright¹,

Holub²,

McBride³

1999

Can. J. Anim. Sci.

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. W. 1999. Apparent transfer efficiency of docosahexaenoic acid from diet to milk in dairy cows. Can. J. Anim. 79: 565-568. Apparent transfer efficiency of docosahexaenoic acid from diet to milk in dairy cattle was investigated. Three levels of a fish meal-containing supplement, 4.5, 14.9, and 29.1% of dry matter intake were added to a basal diet. A linear decline (from 34% to 11%) in apparent transfer efficiency was observed, as level of supplement increased.

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“…Alguns autores (Palmquist e Conrad, 1978;Bernard, 1990;Fernandes, 1994;Wu et al, 1994;Rabelo, 1995;Pereira et al, 1998b) não observaram alterações na porcentagem de gordura no leite em vacas leiteiras, suplementadas com gordura. A suplementação com gordura modifica o perfil de ácidos graxos do leite, ocorrendo redução nos ácidos graxos de cadeia curta, e aumento nos de cadeia longa em vacas (Macleod et al, 1972;Smith et al, 1981;Mielke e Schingoethe, 1981;Mohamed et al, 1988), e em cabras leiteiras (Lu, 1993;Teh et al, 1994;Sleiman et al, 1998).…”

Section: Acta Scientiarumunclassified

Desempenho de cabras em lactação alimentadas com grão de soja

Oliveira

Susin

Pires

et al. 2008

Acta Sci. Anim. Sci.

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Influence of Dietary Fat on Rumen Fatty Acids, Plasma Lipid and Milk Fat Composition in the Cow

Cited by 23 publications

References 20 publications

Distribution of trans-vaccenic acid and cis9, trans11-conjugated linoleic acid (rumenic acid) in blood plasma lipid fractions and secretion in milk fat of Jersey cows fed canola or soybean oil

Distribution of trans-vaccenic acid and cis9, trans11-conjugated linoleic acid (rumenic acid) in blood plasma lipid fractions and secretion in milk fat of Jersey cows fed canola or soybean oil

Apparent transfer efficiency of docosahexaenoic acid from diet to milk in dairy cows

Desempenho de cabras em lactação alimentadas com grão de soja

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