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

Abstract

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. (

Grape seed oil supplementation in lamb diet: effect on meat oxidation stability and muscle fatty acids

“…The lack of significant variation of plasma glucose levels between the control and GSO supplemented diets is in accordance with the absence of effect of plant oils on plasma glucose in goat (Bernard et al 2005(Bernard et al , 2009. Several researchers showed that supplementation of diet with soybean oil, cottonseed oil and palm oil increased blood triglyceride and cholesterol contents (Hernandez et al 1978;Garcia et al 2003). Similarly, addition of sunflower oil at levels of 3.7% and 6.1% of diet DM increased triglyceride and total cholesterol levels in the plasma of Alpine (Bernard et al 2009) and Saanen (Razzaghi et al 2015) goats.…”

Characterization of coconut oil and CLA induced lipolysis

“…In addition to the cAMP dependent pathway, there are several other pathways which can alter lipolysis in an adipocyte in response to various fatty acids. Phospholipase C (PLC) has been known to be activated by unsaturated fatty acids [35,36]. PLC cleaves phoshotidylinositol bisphosphate into diacylglyceride (DAG) and inositol 1,4,5-trisphosphate (IP3).…”