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Genčić, Marija S.; Aksić, Jelena M.; Živković Stošić, Milena Z.; Randjelović, Pavle J.; Stojanović, Nikola M.; Stojanović-Radić, Zorica Z.; Radulović, Niko S.
Food and chemical toxicology, December 2021, 2021-Dec, 2021-12-00, 20211201, Letnik: 158Journal Article
Immortelle (Helichrysum italicum, Asteraceae) essential oil has been widely used in alternative medicine to accelerate wound healing, as well as in cosmetic products to stimulate skin regeneration and to reduce the appearance of wrinkles. It is also considered a natural and safe culinary spice that could also be applied in the food industry as a preservative in the future. The therapeutic efficacy of this oil changes with the natural variability of the composition. Herein we tested and mutually compared the antimicrobial and anti-inflammatory activities of four commercial immortelle oils differing in the relative amounts of marker compounds, i.e. neryl esters, α-pinene, γ- and ar-curcumenes, and β-diketones. The anti-inflammatory effect of selected chromatographic fractions, enriched in the aforementioned constituents, was evaluated by studying toxicity toward rat peritoneal macrophages, their nitric oxide production, myeloperoxidase, and arginase activities. Subsequently, the compositional and activity data were subjected to a multivariate statistical treatment to reveal the possible correlation(s) between the percentage of essential-oil constituents and the observed activities. The obtained results imply that immortelle oil efficiency as an antimicrobial and/or anti-inflammatory agent is most plausibly a result of a synergistic action between its constituents, and/or, rather unexpectedly, the presence of some minor constituents. •Helichrysum italicum essential oil (EO) is used to promote wound healing.•Variations in the EO composition apparently affect its toxicity/bioactivity.•The tested EOs displayed strong antimicrobial and anti-inflammatory effects.•Unexpected links between the constituent amount and the toxicity were established.•Minor constituent presence and synergistic action define the modus operandi.
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