The composition and structure of the lipids of sheep lymph

Christie, William W.; Hunter, Margaret

doi:10.1002/jsfa.2740290506

Cited by 7 publications

References 32 publications

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The lipid composition of the adrenals of non‐pregnant, pregnant and foetal sheep

Christie

Noble

1984

J Sci Food Agric

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Lipids were isolated from the adrenals of non-pregnant, pregnant and foetal sheep (ca 30 days pre-parturition). The lipid content of the adrenals from the pregnant sheep was higher than that of the other groups, and most of this was accounted for by triacylglycerols. Little difference was observed in the fatty acid compositions of the various lipid classes between the pregnant and non-pregnant animals. All the lipids of the foetal adrenals contained substantial amounts of the 20: 3(n-9) fatty acid, which is often associated with essential fatty acid deficiency, but only the cholesterol ester fraction contained a higher level of polyunsaturated fatty acids than was present in the adult groups. The adrenals of the pregnant sheep contained significant levels of glycerolether diesters and neutral plasmalogens, which were fully characterised, and four unknown components that were tentatively identified as steroidal esters. These components were present at barely detectable levels in the adrenals of non-pregnant sheep. The triacylglycerols, glycerolether diesters and phosphatidylcholines from each group were, where possible, subjected to stereospecific analysis. The triacylglycerols were distinctive and resembled those of plasma and lymph in structure. The results are discussed in terms of a putative direct role for cholesterol esters in corticosteroidogenesis.

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The lipid composition of the adrenals of non‐pregnant, pregnant and foetal sheep

Christie

Noble

1984

J Sci Food Agric

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A comparison of the lipid compositions of the lipoproteins of the intestinal and popliteal lymph and plasma of sheep

et al. 1984

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The lipids and lipoproteins of intestinal lymph in the sheep make a contribution to the corresponding fractions in plasma and thence affect lipid compositions in other tissues. As a first step towards assessing this contribution, the lipoproteins of intestinal lymph, peripheral (popliteal lymph) and plasma have been isolated for compositional studies. Popliteal lymph and the plasma were similar in the distributions of lipids among the major lipoprotein fractions with high-density lipoproteins accounting for just over half of the total lipid present. In intestinal lymph, 80 per cent of the total lipid was associated with the very low-density lipoprotein fraction. Whereas triacylglycerols comprised the principal lipid component of the very low-density lipoprotein and low-density lipoprotein fractions of the intestinal lymph and were present in the high-density lipoprotein fraction, they were present in essence only in the very low-density lipoprotein fraction of popliteal lymph and plasma, where high concentrations of cholesteryl esters and phospholipids were found in all the lipoprotein fractions. The fatty acid compositions of each lipid class were also determined. The most distinctive feature of the results was the distribution of the essential fatty acid, linoleic acid, among the lipid components. In all lipid classes in each of the body fluids, the concentration of this component was highest in the high-density lipoproteins and lowest in the very low-density lipoproteins. Higher concentrations tended to be present in the triacylglycerols and phosphatidylcholine fractions of intestinal lymph than of plasma and popliteal lymph, but the opposite was true of the cholesteryl esters. The results are discussed in terms of the sources of the linoleic acid in the lipids of intestinal lymph of ruminant animals.

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The Composition and Structure of Milk Lipids

Christie

1983

Developments in Dairy Chemistry—2

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The composition and structure of the lipids of sheep lymph

Cited by 7 publications

References 32 publications

The lipid composition of the adrenals of non‐pregnant, pregnant and foetal sheep

The lipid composition of the adrenals of non‐pregnant, pregnant and foetal sheep

A comparison of the lipid compositions of the lipoproteins of the intestinal and popliteal lymph and plasma of sheep

The Composition and Structure of Milk Lipids

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