The relationship between process of peroxidation of lipids, activity of antioxidant system and fatty-acid composition of blood in patients with diabetes mellitus type I and under its complications
The results of study testify that in patients the diabetes mellitus type I is accompanied by dyslipidaemia of atherogenic character. The activation of processes of lipid peroxidation is also present and results in increasing of content of both primary and secondary products of peroxidation of lipids and disorders in system of antioxidant defense. In patients with diabetes mellitus increase of total content of saturated fatty acids mainly at the expense of myristinic acid accompanied by decreasing of total content of unsaturated fatty acids. This occurrence was mostly expressed in patients with complications of diabetes mellitus. The study marked direct correlation relationship between activity of superoxide dismutase and level of a-linolenic acid (r=0.53, p<0.05), and also between level of diene conjugates and enzyme activity of glutathione peroxidase (r=0.47, _p<0.05). The direct correlation relationship existed between concentration of malondialdehyde and content of linolenic acid (r=0.67, p<0.05). The total ratio of content of omega-6/omega-3 decreased (p<0.05) at the expense of increase of total activity of superoxide dismutase and catalase (r=-0.763, p<0.05). Therefore, in patients with complicated diabetes mellitus against the background of dyslipidaemia significant alterations were established concerning both level and content of fatty acids, rising of concentration of free radicals and decrease of activity of enzymes of antioxidant defense.