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Composition of serum lipo proteins in veal calves fed a milk replacer supplemented with cholesterol



Composition of serum lipo proteins in veal calves fed a milk replacer supplemented with cholesterol



Nutrition Reports International 27(3): 587-598



Veal calves, aged .apprx. 9 wk, were fed a milk replacer diet without or with added cholesterol (10 g/kg) for 10.5 wk. Blood samples from the animals were taken in the fed state at regular intervals. The calves fed cholesterol showed a significant increase in serum cholesterol concentration after 5 days; the new steady state was reached after .apprx. 4 wk. Dietary cholesterol markedly increased the cholesterol and protein content of the VLDL [very low density lipoprotein], IDL [intermediate density lipoprotein] ([band at density] 1.019) and LDL [low density lipoprotein] (1.019-1.063 band) fractions. The concentrations of protein and cholesterol in the HDL[high density lipoprotein]1 (1.063-1.092 band) fraction were only slightly affected, but this was partly due to the fact that the density of these lipoprotein particles was drastically decreased; and, therefore, these particles were also recovered in the LDL fraction. When compared to the control calves, the cholesterol-fed animals showed a marked increase in the apoprotein E content of their VLDL and IDL fractions. The LDL fraction of the cholesterol-fed calves contained a low MW variant of apoprotein B, possibly of intestinal origin. Cholesterol feeding of the calves increased the amount of cholesterol in the liver, but not that in kidney, muscle and adipose tissue.

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Accession: 005023724

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