Tag Archives: fatty acid composition

Fatty acid composition of structural lipids of normal and abnormal wool fibres

V. V. Havrylyak, V. M. Tkachuk

Institute of Animal Biology, National Academy of Agrarian Sciences, Lviv, Ukraine;
e-mail: havvita@ukr.net

The purpose of this study was to determine the fatty acid composition of structural lipids, isolated from normal and abnormal wool fibers. The results of these studies show that regardless of the type of wool fibers defect there are quantitative changes in their fatty acid composition.  It was shown that the main fatty acid of the covalently bound lipids, isolated from the wool fibers­, is 18-methyleicosanoic acid (18-MEA), comprising 40% of the total fatty acid, while its amount in free lipids in norm is less than 4%.  The decrease of 18-MEA content in the covalently bound lipid both in pathological thin and entangled wool fibers was established, which is associated with damage of the cuticle layer surface. Increasing of 18-MEA content in the free lipids in the entangled wool fibers may indicate a rupture of tioester links between lipids and proteins of cuticle layer lamellar structures.

Oxidative stress in blood leukocytes, pro/antioxidanт status and fatty acids composition of pancreas lipids at experimental acute pancreatitis in rats

I. B. Pryvrotska1, T. M. Kuchmerovska2

1I. Нorbachevsky Ternopyl State Medical University, Ukraine;
2Palladin Institute of Biochemistry, National Academy of Science of Ukraine, Kyiv;
e-mail: irina.privrotska@yandex.uа

In an experimental model of acute pancreatitis (АP) in rats no alteration in leukocyte’s viability was found by flow cytometry as compared to control. After 1 day of AP production of reactive oxygen forms in granulocytes was increased more than 5 times, but after 3 days their level was decreased. Alterations of pro/antioxidant status and specific changes in the fatty acid composition in the pancreas were established. With the development of AP, the processes of lipids peroxidation were intensified while antioxidant system was altered, that was evidenced by inflammation in the pancreas. In these conditions, the increase of phospholipase A2 activity was accompanied by significant changes of fatty acid composition of the total lipids in the pancreas. This increased relative total content of saturated fatty acids, in particular myristic, palmitic and stearic acid increased, while the total content of polyunsaturated essential fatty acids ω-3 (linolenic, eicosapentaenoic, dokozapentayenoic, docosahexaenoic) decreased. The preparation containing ω-3 polyunsaturated fatty acids partially normalized the lipid and fatty acids composition as well as prooxidant-antioxidant system.

Fatty acid composition of phospholipids and esterified cholesterol of the blood plasma of rabbit under arginine acute pancreatitis

O. O. Hopanenko, J. F. Rivis

Institute for Agriculture Region of Carpathian, National Academy of Agricultural Sciences, Lviv;
e-mail: hopanenko@gmail.com

The content and fatty acid composition of phospholipids and esterified cholesterol were studied in the blood plasma of rabbits under acute arginine pancreatitis and its correction using linseed oil. It is established that the transport and anti-inflammatory functions of blood plasma deteriorates under acute arginine pancreatitis due to a decrease of the content of polyunsaturated fatty acids in phospholi­pids. The amount of cholesterol esterified with saturated and monounsaturated fatty acids increases in the blood plasma of rabbits. The concentration of phospholipids­ and esterified cholesterol is normali­zed and their fatty acid composition is improved in the lipid composition of the blood plasma of rabbits with acute arginine pancreatitis fed with linseed oil.