[Development of liposomal form of polyunsaturated fatty acid concentrate: ways of using in production of functional foods].

The research is aimed at obtaining a concentrate of polyunsaturated fatty acids (PUFA) in liposomal form and developing possible ways of PUFA application in manufacturing functional food products. The PUFA concentrate was obtained from the fat of the Baikal seal by method of complexing with urea. We prepared a liposomal form of PUFA concentrate by evaporating organic solvent from the solution of lipids to form a thin lipid film with addition of buffer solution and further extrusion of the obtained emulsion.

[Cellular composition of the mesenteric lymph node cortex in Baikal nerpa during postnatal ontogenesis].

Cellular composition (relative cell content and cell density) of nodules' germinal centers, mantle zones and paracortical zones was evaluated morphometrically in mesenteric lymph nodes of 65 Baikal nerpas (Pusa sibirica Gmelin) aged 1 month-19 years. A significant decrease in the number of large and medium lymphocytes (3 and 1.9 times, respectively) and reticular cells (2.

[Structural organization of mesenteric lymph nodes in postnatal development of the Baikal seal, Pusa sibirica Gmel].

Structural organization of mesenteric lymph nodes in the Baikal seal has been studied with regard to its age-dependent changes. It has been shown that the relative area of connective tissue structures (the capsule and trabeculae) increases during postnatal development, while the areas of the cortex and medulla decrease. The proportions of secondary lymph nodes and paracortical zone in the cortex become smaller, with the corticomedullary index tending to decrease with age.

[Lymphoid structure in the mouse cecum wall during immunosuppression and its correction with liposomal agents].

The influence of liposomal preparation obtained from the Baikal seal fat on lymphoid structures in mouse coecum wall on the background of immunodepressive state induced by asathioprine was studied using microscopic methods and statistic analysis. It was demonstrated that asaphioprine administration caused decline in lymphoid serie cells, outgrowth of adipose tissue, causes destructive changes of lymphoid structures in the coecal wall. After the effect of liposomes on the background on the immune suppression morphological state of lymphoid structures was approximated to the normal state while the indexes of cellular composition returned to the level of control values which was conditioned by immunocorrecting properties of the drug studied.