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Medium-Chain Triacylglycerols Effect Fatty Acid Modification in Rat's Kidney

Ljubica Glavaš-Obrovac ; Faculty of Food Technology, University of Osijek, 54000 Osijek, Croatia
Ivka Steiner-Biočić ; Faculty of Food Technology, University of Osijek, 54000 Osijek, Croatia
Ivančica Delaš ; Clinical Institute of Laboratory Diagnostics Clinical Hospital Centre and Dept of Chem. and Biochem., Faculty of Medicine, University of Zagreb, Croatia
Milivoj Popović ; Clinical Institute of Laboratory Diagnostics Clinical Hospital Centre and Dept of Chem. and Biochem., Faculty of Medicine, University of Zagreb, Croatia

Sažetak

The aim of this investigations was to study the effect of a short- time medium-chain triacylglycerols diet (MCTD) on the lipids (particularly of fatty acids) of the rat kidney. During 14 days, two groups of rats (Fischer strain) were fed a MCTD (18.7% MCTs, 16.5 kJ/g dry matter) or an isoenergetic control diet (standard rat chow). Total lipids were isolated and separated into particular lipid classes by thin-layer chromatography. No essential differences in the distribution of analyzed lipids (cholesterol, cholesterol ester, tracylglycerols, free fatty acids, phosphatidylcholine, phosphatidylethanolamine and sphingomyeline) were noticed after MCTD.
The results showed no changes in the concentration of total neutral lipids, but slight changes appeared in the concentration of particular classes of neutral lipids. Concentrations of cholesterol and cholesterol ester were decreased by approximately 14% by MCTD feeding and, at the same time, the concentration of triacylglycerols, free fatty acids and esters of fatty acids was increased by 4%. The ratio of free cholesterol to total phospholipids (C/P) decreased (17%) after MCTD.
The data indicate a significant increase in fatty acid saturation (expressed as a saturation factor (Sf)) affected by MCTD.
Both of the mentioned data (C/P ratio, Sf), as well as some additional ones reported in this paper, suggest that MCTD can affect the membrane fluidity, although at present it is not possible to judge whether or not such effects could change the physiological function of the kidney.

Ključne riječi

Hrčak ID:

135967

URI

https://hrcak.srce.hr/135967

Datum izdavanja:

4.3.1996.

Posjeta: 759 *