Biologically active substances (BAS) extracted from marine hydrobionts are characterized by high diversity and efficiency. They are represented by carotenoids, phospholipids, saponins and other compounds possessing high antioxidant (AOA), antitumor, immunomodulatory, radioprotective, and hypolipidemic activities. Because of extremely high marine BAS activity, the BAS dose necessary for treatment and prevention of many diseases is very small.  The aim of present work was to assess biological properties of BAS complexes extracted from Black Sea marine inverterbrates for their following using in pharmacological preparations including liposomal drug delivery. BAS complexes were extracted from marine invertebrate tissues by two-phase extraction in combination with ultrasonication. Antioxidant activity of BAS extracts was determined with potassium permanganate discoloration method in an aqueous sulfuric acid medium. Antimicrobial activity was investigated by germination of BAS extracts.  BAS influence on lymphocyte proliferative activity was studied with help of cytogenetic analysis. In this paper, the assessment of antioxidant, antimicrobial and mitogenic activities of biologically active complexes extracted from marine invertebrate tissues is presented. BAS properties in the oil  and alcohol-water phases are compared. For the first time BAS complexes from Black Sea invertebrates are extracted by the resource-light method of two-phase extraction in combination with ultrasonication. Conditions for obtaining BAS extracts with optimal characteristics are proposed.

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Data on vitamin D metabolism suggest that it is a secosteroid prohormone. Current studies have shown that the mechanism of functioning of vitamin D is associated with a specific receptor of the hormonally active form of this vitamin (VDR). Receptors for vitamin D are identified in more than 40 target tissues of the body (bones, muscles, intestine, kidneys, heart, prostate gland, mammary glands, pancreas), in particular in most cells of the immune system and epithelial cells lining the mucous membranes which determines many of its biological effects. Vitamin D levels affect 172 major physiological indicators of human health [1,2]. Determining the optimal values for vitamin D connect in body plays a key role in establishment of recommendations for maintaining the normal status of this vitamin throughout the year, including winter months. In connection with the discovery of new extraskeletal (non-calcemic) functions of vitamin, as well as the influence on its content of geographical, ethnic and age factors, it became necessary to clarify the norms of physiological need for this vitamin based on regional conditions [2]. The work presented is a part of comprehensive research on optimizing the reference values of diagnostic systems and enzyme immunoassay systems, in particular, to definite human populations. The investigations presented out in this work revealed the most vulnerable groups in relation to D deficiency and revealed significant seasonal degradation of vitamin content, despite the fairly comfortable climate conditions of the coast of Greater Sochi.