The Changes in the Total Fatty Acids, Phospholipid Fatty Acids, and Cholesterol of the Blood During the Lactation Cycle

Maynard, L. A.; Harrison, Eleanor; McCay, C. M.

doi:10.1016/s0021-9258(18)76515-0

Cited by 26 publications

(2 citation statements)

References 11 publications

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“…This interaction was likely the result of alterations in blood lipid concentrations. Plasma cholesterol can be used as an index of plasma lipid concentrations (Maynard et al, 1931;Herdt and Smith, 1996). Within vitamin E treatment, plasma cholesterol and α-tocopherol were correlated (r 2 = 0.5 to 0.67).…”

Section: Plasma and Milk α-Tocopherolmentioning

confidence: 99%

Effect of Dietary Fat and Vitamin E on α-Tocopherol in Milk from Dairy Cows

Weiss

Wyatt

2003

Journal of Dairy Science

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Diets with different fat treatments and with 25, 125, or 250 IU of supplemental vitamin E (all-rac alpha-tocopheryl acetate)/kg of dry matter (DM) were fed for 28 d to midlactation Holstein cows to determine factors affecting concentrations of alpha-tocopherol in milk. Diets contained no supplemental fat or 2.25% added fat from roasted soybeans or tallow. Vitamin E treatment had no effects on production, but fat supplementation increased milk yield (37.2 vs. 35.1 kg/d). Cows fed RSB ate more DM (24.0 vs. 21.9 kg/d) and produced more milk fat than cows fed tallow. Supplemental fat increased plasma concentrations of alpha-tocopherol and cholesterol. Increased intake of alpha-tocopherol linearly increased concentrations of alpha-tocopherol in plasma but the rate of increase was 1.9 times greater when fat was fed. Plasma alpha-tocopherol concentrations were linearly related to concentrations in milk, but a change in plasma alpha-tocopherol resulted in a smaller change in milk alpha-tocopherol when fat was fed than when it was not. Fat treatment did not affect plasma alpha-tocopherol expressed relative to plasma cholesterol (mg alpha-tocopherol/g cholesterol) or relationships between plasma alpha-tocopherol/g of cholesterol and milk alpha-tocopherol. These data suggest that concentrations of alpha-tocopherol in milk are a function of the alpha-tocopherol enrichment of the plasma lipid fraction and enrichment of that fraction is saturable.

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Section: Plasma and Milk α-Tocopherolmentioning

confidence: 99%

Effect of Dietary Fat and Vitamin E on α-Tocopherol in Milk from Dairy Cows

Weiss

Wyatt

2003

Journal of Dairy Science

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“…The significantly higher levels of serum vitamin E, when expressed as mg/1, in the lactating cows than in the dry cows were certainly the result of the:iir higher intake of concentrates and, thereby, of vitamin E, because equal amounts of roughages were offered to all the cows in each herd. It is well known that lactating cows have higher levels of total lipids than dry cows (Maynard et al 1931, Riis 1964. When compari1ng the lactating and dry cows it seems probable that the supplementary DL-0(.tocopheryl acetate contributed at least half the total serum viitamin E in the lactating cows.…”

Section: Resultsmentioning

confidence: 99%

Vitamin E Status of Healthy Swedish Cattle*

Pehrson

Hakkarainen

1986

Acta Vet Scand

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pressure liquid chromatography the serum concentraHon of vitamin E was measured in dairy cows fed either hay or silage as their main roughage, in calves fed milk-replacer, and m young intensively fed bulls. The concentrates fed to the cows, calves and bulls we.re supplemented with 5-10, 25 and 5-10 mg DL-cx-tocopheryl acetate pe.r kg, respectively, and the milk-replacer for the calves was supplemented with 50 mg DL-cx-tocopheryl acetate per kg powder. Cows fed silage as their madn roughage had higher serum vitamin E concentrations (x: 3.8-5.2 mg/I) than cows fed onJy hay (x: 2.5--4.1 mg/I). Lactating cows had higher vitamin E concentrations than dry cows (x: 4.1-5.2 and 2.5-3.8 mg/I, respectively) and calves and bulls had much lower vitamin E concentrations (x: 1.4 and 1.2 mg/I, ly) than cows. Thirty per cent of the calves and 41 % of the bulls had serum vitamin E concentrations less than 1.0 mg/I, suggesting that in thes•e aruimals the conventional leveJ of supplementation of feeds with DL-cx-tocopheryl acetate in Sweden is probably inadequate for the prevention of nutritional muscular degeneration and other negative effects. nutritional muscula,r degeneration; feed supplementation; cx-tocopherol; DL-cx-tocopheryl acetate; dairy cattle; milk-replacers; intensively fed young bu I Is; mi I k-f e d ca Ives; meat production.* The investigation was supported by the Swedish Council for Forestry and Agricultural Research.

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Distribution of fatty acids in the plasma lipids of herbivores grazing pasture: A species comparison

Leat¹,

Baker²

1970

Comparative Biochemistry and Physiology

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The Changes in the Total Fatty Acids, Phospholipid Fatty Acids, and Cholesterol of the Blood During the Lactation Cycle

Cited by 26 publications

References 11 publications

Effect of Dietary Fat and Vitamin E on α-Tocopherol in Milk from Dairy Cows

Effect of Dietary Fat and Vitamin E on α-Tocopherol in Milk from Dairy Cows

Vitamin E Status of Healthy Swedish Cattle*

Distribution of fatty acids in the plasma lipids of herbivores grazing pasture: A species comparison

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