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Although the major components of various organs of sea buckthorn have been identified (particularly phenolic compounds), biological properties of many of these phytochemicals still remain poorly characterized. In this study, we focused on the chemical composition and biological activity of preparations that were obtained from sea buckthorn twigs and leaves. The objective was to investigate cytotoxicity of these preparations against human fibroblast line HFF-1, using MTT reduction assay, their anti- or pro-oxidant activities against the effects of a biological oxidant -H 2 O 2 /Fe-on human plasma lipids and proteins in vitro (using TBARS and carbonyl groups as the markers of oxidative stress). Antimicrobial activity of the tested preparations against Gram-positive ( Staphylococcus aureus , S. epidermidis , Enterococcus faecalis ) and Gram-negative bacteria ( Escherichia coli , Pseudomonas aeruginosa ), as well as against fungi ( Candida albicans , C. glabrata ) by the EUCAST-approved broth microdilution method, followed by growth on solid media, were also assessed. Our analysis showed significant differences in chemical composition and biological properties of the tested preparations (A-F). All tested preparations from sea buckthorn twigs (D-F) and one preparation from sea buckthorn leaves (preparation C) may be a new source of phenolic antioxidants for pharmacological and cosmetic applications.

molecules/molecules online/molecules annual

Evaluation of Antimicrobial, Antioxidant, and Cytotoxic Activity of Phenolic Preparations of Diverse Composition, Obtained from Elaeagnus rhamnoides (L.) A. Nelson Leaf and Twig Extracts