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Dietary lipids composition

Fatty Acid Compositions of Some Dietary Lipids ... [Pg.241]

Awad, T. B. and J. P. Chattopadhyay. Effect of dietary fats on the lipid composition and enzyme activities of rat cardiac sarcolemma. J Nutr 1983 113(9) 1878-1883. [Pg.148]

CN203 Clamp, A. G., S. Ladha, D. C. Clark, R. F. Grimble, and E. K. Lund. The influence of dietary lipids on the composition and membrane fluidity of rat hepatocyte plasma membrane. Lipids 1997 32(2) 179-184-... [Pg.153]

Although proteins and amino acids in the food influence the metabolism of the fish, they do not alter the amino acid composition of proteins in the body. In contrast, the lipids in the body of the fish are greatly influenced by the dietary lipids. In particular, it is the triacyl-glycerols (the main constituents of reserve energy) which are influenced by diet (Lovem, 1937,1942,1964 Kelly et al., 1958 Brockerhoff et al., 1963, 1964 Ackman, 1964, 1967 Ananyev, 1965 Ackman and Eaton, 1966, 1976). Food lipids also influence the structural lipids of the fish. [Pg.53]

Both marine and freshwater fish are often overfed in fish farms, so their own lipids are less likely to follow changes in the dietary lipid pattern. In the natural state, the influence of food on the lipids of the tissues is somewhat blurred by the fact that some of the tissue lipids are generated from carbohydrates and proteins in the diet and so synthesized de novo. In his classic work, Lovem (1964) showed that the impact of food on the fatty acid composition of herring lipids was most pronounced during intensive feeding. In winter, at the end of that period, the fatty acid composition became different from that of the zooplankton on which the fish had been feeding earlier. [Pg.55]

PBS and gently blotted to remove blood and tissue fluids, then suspended over the lip of a small (250 pi) microcentrifuge tube and punctured with a needle to allow the bile to drain into the tube. Store frozen until assay. There is usually enough material to measure lipid composition (bile acids, cholesterol, phospholipids) with standard colorimetric kits (<1 pi needed for each assay). In addition to biliary cholesterol levels, it is important to take note of bile salt concentrations, since these are the detergents which suspend dietary lipids in micelles and deliver them to the intestinal epithelium for absorption by enterocytes. Differences in bile salt concentration alone could lead to differences in cholesterol absorption. [Pg.171]

It is generally accepted that insects synthesize a majority of their cuticular hydrocarbons (Nelson and Blomquist, 1995), although studies have shown that dietary hydrocarbons are incorporated into cuticular lipids (Blomquist and Jackson, 1973a). However, for most species it appears that dietary lipid accounts for very small amounts of insect cuticular hydrocarbon. Some inquilines, which use cuticular hydrocarbons in chemical mimicry, synthesize hydrocarbons with a composition very similar to those of their host termites (Howard et al., 1980 see also Chapter 14). A number of studies with widely diverse insect species have established that the major site of hydrocarbon biosynthesis occurs in the cells... [Pg.35]

It is clear from the above discussion that alterations in dietary lipid intake can profoundly affect cell membrane composition in human skin, and consequently influence many physiological and pathological processes. While deficiency of LA results in loss of barrier function and hyperproliferation, an altered n-3 and n-6 EFA balance may influence many processes including a wide range of inflammatory and immune responses, and skin carcinogenesis. There is evidence that alterations in eicosanoid production may contribute to many of the activities, while there is also an increasing understanding... [Pg.329]

Ertas et al. (2005) investigated the potential effects of dietary supplementation by coriander seed (considered as a lipolytic and antioxidant compound) on carcass lipid composition of quails. Their aim was to reduce saturated fatty acid consumption and to increase essential fatty acids (particularly n3 unsaturated acids) in alimentation. Dietary supplementation by coriander seed affected the lipid composition of carcass greatly by decreasing saturated fatty acid (SFA) contents (palmitic and stearic acids) and by increasing monounsaturated and polyunsaturated fatty acid (MUFA and... [Pg.205]

Blank, M.L., Cress, E.A., Smith, Z.L., Snyder, F. 1991. Dietary supplementation with ether-linked lipids and tissue lipid composition. Lipids. 26, 166-169. [Pg.239]

However, similar changes in lipid composition are possible using a variety of other cell types (Bums and Wagner, 1993) such as an adenocarcinoma (Awad and Spector, 1976), and hepatoma (Wood et al, 1975). The dietary fatty acid modification is not limited to tumor cells, since many tissues of the host are affected (Bums et al., 1983). However, different tissues are modified to varying extents, and because of this it will likely be possible to develop protocols that provide therapeutic selectivity by producing greater or lesser enrichment of the neoplastic cells with a particular type of fatty acid as compared to normal tissues. We have also demonstrated that L1210 leukemia cells that were fatty acid modified in vivo and then placed into tissue culture maintain their experimentally-induced fatty acid composition for up to 4 days (Bums et al, 1980). Therefore, this is a versatile model. [Pg.109]

There is substantial evidence that indicates that dietary fat can influence significantly not only serum levels of cholesterol and triacylglycerols but also the lipid composition and content of Apoproteins (156-159). Much attention has been placed on the effects of diet on LDL levels, and saturated fatty acid and cholesterol itself have been identified as the major nutritional factors that can raise serum LDL-cholesterol levels. However, LDL cholesterol is only one of the many risk factors for atherosclerosis, and it is not known if oxidative modification of LDL is an equally or more important factor in the pathogenesis of atherosclerosis than total LDL cholesterol per se. More longitudinal studies are needed to answer these questions. If lipid peroxidation is a major risk factor for atherosclerosis, then excess consumption of highly unsaturated fats may not be advisable. [Pg.631]

Hamm, M. W, Sekowski, A., and Ephrat, R. (1988). Dietary fat ratios and liver plasma membrane lipid composition. Lipids 23, 829-833. [Pg.372]

In addition, the receptor-binding activity of the apoE2 can be modulated by the lipid composition of lipoprotein particles (Innerarity et ai, 1986). The binding activity of the d < 1.006 lipoproteins (j8-VLDLs) of a type III subject with this variant was tested before and after dietary intervention. Before intervention, the subject expressed the clinical features of type III hyperlipoproteinemia plasma triglycerides and cholesterol were elevated (670 and 725 mg/dl, respectively). After dietary intervention (a common treatment for this disorder, to which patients often respond satisfactorily), the subject lost 34 lbs. and his... [Pg.278]

Healy, D.A., Wallace, F.A., Miles, E.A., Calder, P.C., and Newsholm, P. 2000. Effect of low-to-moderate amounts of dietary fish oil on neutrophil lipid composition and function. Lipids 35, 763-768. [Pg.135]

The importance of relative TAG concentration and total lipid in the distribution of POP amongst tissues is further demonstrated in the Jorgensen et al.60 study in which lean and fat Arctic charr were produced by two different dietary regiments. This study reports distribution differences in a relatively artificial situation (fish were either fed or starved prior to POP exposure), so that it addresses neither active starvation nor interspecies differences since the lean and fatty fish were produced from the same species. Nevertheless, this study still provides insight into the relationship between POP distribution and tissue lipid composition. The total amount of OCS recovered at... [Pg.136]

Gibney MJ, Bolton-Smith C. The effect of a dietary supplement of n-3 polyunsaturated fat on platelet lipid composition, platelet function, and platelet plasma membrane fluidity in healthy volunteers. Br J Nutr 1988 60 5-12. [Pg.58]

Popp-Snigders C, Shouten JA, Van Blitterswijck WJ, Van der Veen EA. Changes in membrane lipid composition of human erythrocytes after dietary supplementation of (n-3) polyunsaturated fatty acids. Biochim Biophys Acta 1986 854 31-37. [Pg.60]

Yamamoto N, Hashimoto A, Takemoto Y, Okuyama H, Nomura M, Kitjaima R, et al. Effect of the dietary alpha-Unolenate/linoleate balance on lipid compositions and learning ability of rats. IL Discrimination process, extinction process, and glycolipid composition. J Lipid Res 1988 29 1013-1021. [Pg.176]

Suzuki H, Park S J, Tamura M, Ando S. Effect of the long-term feeding of dietary lipids on the learning ability, fatty acid composition of brain stem phospholipids and synaptic membrane fluidity in adult mice a comparison of sardine oil diet with palm oil diet. Meeh Ageing Develop 1998 101 119-128. [Pg.234]


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