Protein Protected Fat for Ruminants II. Serum Lipids and Lipoproteins

Dryden, F. D.; Marchello, J. A.; Cuitun, L. L.; Hale, W. H.

doi:10.2527/jas1975.404697x

Cited by 19 publications

(7 citation statements)

References 8 publications

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“…Although the present investigations showed that there were no dietary effects on the overall concentrations of the major plasma lipids at higher intakes of tallow and polyunsaturated fatty acid containing diets, increased concentrations of ruminant plasma lipids have been observed (21,(39)(40)(41). As a result of feeding diet B in the present experiment, the concentration of triglycerides within the VLDL fraction was considerably increased and there was a compensatory decrease in the proportion of cholesteryl esters.…”

Section: Discussioncontrasting

confidence: 68%

“…As a result of feeding diet B in the present experiment, the concentration of triglycerides within the VLDL fraction was considerably increased and there was a compensatory decrease in the proportion of cholesteryl esters. With the addition of "protected" PUFA to the diet of fattening steers, a similar redistribution of lipids in favor of the low density fractions has also been observed (41). More recently it has been shown with rats that long term feeding of diets containing a high proportion of PUFA may have a specific effect upon the distribution of lipid classes and thereby the physical properties of the VLDL fraction (30).…”

Section: Discussionmentioning

confidence: 81%

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The effect of dietary fats on the plasma lipid composition of sheep

Noble

Vernon

Christie

et al. 1977

Lipids

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This study reports on the plasma lipid compositions of sheep fed either a control diet (C), a control diet supplemented with tallow (A) or polyunsaturated fatty acid (B) that had been protected against hydrolysis and hydrogenation in the rumen, or a control diet supplemented with maize oil (D). Diet B considerably increased the 18∶2 content of all the major plasma lipid fractions. Although the feeding of diet D also resulted in an increase in the 18∶2 contents within the cholesteryl ester, unesterified fatty acid, and phospholipid fractions the increases were considerably less than those observed with diet B; the levels of 18∶2 within the triglyceride fraction remained similar to that for the sheep which received the control diet. The effect of feeding diet A was confined solely to the triglyceride fraction where the concentrations of 16∶0 and 18∶1 were increased. The lipoproteins of the plasma were separated into very low density lipoproteins (d<1.006), low density lipoproteins (1.006

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Section: Discussioncontrasting

confidence: 68%

Section: Discussionmentioning

confidence: 81%

The effect of dietary fats on the plasma lipid composition of sheep

Noble

Vernon

Christie

et al. 1977

Lipids

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“…Thus, from the data obtained in the present study, possible differences between species were apparent in response to dietary protected lipid. The reported increase by Dryden et al (1975) in the serum lipid levels of steers supplemented with protected safflower oil over the control group was as much as 2.1 times. Furthermore, Bitman et al (1973) have noted a threefold increase in blood triglyceride and nonesterified fatty acids in cows fed protected safflower oil during a 50 day trial.…”

Section: Resultsmentioning

confidence: 89%

Protein Protected Fat for Ruminants. IV. Plasma Lipid, Insulin and Depot Fat Composition of Lambs

Mata-Hernandez

Dryden

Marchello

et al. 1978

Journal of Animal Science

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Fourteen crossbred lambs with an average weight of 29.4 kg were utilized to determine the influence of the nature and amount of dietary lipid intake on the qualitative and quantitative composition of the plasma lipid, carcass depot fats and plasma insulin levels. Formaldehyde treated casein-cottonseed oil (PCO) was supplemented at the rate of 8% (three lambs) and 12% (three lambs). Two groups of four lamb each were assigned to diets containing no added fat (control) and 8% unprotected cottonseed oil (8% CO).Dietary lipid supplementation was effective in elevating (P<.05) the lipid levels of the blood. No difference (P>.05) in plasma insulin levels were detected between the four diets. Oil supplementation increased (P<.05) the concentration of linoleic acid in the four plasma lipid fractions: cholesterol esters, phospholipids, free fatty acids and triglycerides. Although not always statistically significant, the content of total unsaturates tended to increase (P<.05) in all plasma fractions.Subcutaneous fat biopsies obtained from the tailhead region at 0, 14, 42 and 84 days on feed revealed that the type of dietary fat fed was effective in altering the type of fatty acids deposited subcutaneously. Feeding cottonseed oil protected from rumen fermentation elevated the linoleic acid levels of subcutaneous fat, but the total unsaturated fatty acid levels were not different between diets. (

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“…Les variations de leurs caractéristiques ont été étudiées en fonction du cycle gestation-lactation (Raphael, Dimick et Puppione, 1973), de la traite (Gleockler, Ferreri et Flaim, 1980) ou chez la Vache cétonémique (Mc Carthy et a/., 1968). Elles ont également été étudiées en fonction de différentes conditions nutritionnelles, notamment de la teneur de la ration en protéines (Stead et Oldham, 1978) en lipides non protégés (Dryden et al, 1971) ou en lipides protégés (Dryden et al, 1975 Welch, 1975 ;Forte, Bell-Quint et Cheng, 1981) par l'abondance des HDL (58,3 %) et leur relative pauvreté en LDL (19,0 %). Cependant, par l'ingestion de lait riche en matières grasses (22 %), le Veau accumule, à la différence de l'adulte ( < 5 %), 22,4 % de lipoprotéines de très basse densité dont 9,2 % sous forme de chylomicrons qui représentent la forme essentielle du transport des lipides alimentaires utilisables par les tissus.…”

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