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1. Composition and antimicrobial activity of essential oils of Salvia fruticosa and Salvia ringens (Lamiaceae).

Author

Stojanović, Danilo, Marčetić, Mirjana, Ušjak, Dušan, and Milenković, Marina

Subjects
*ESSENTIAL oils, *ANTI-infective agents, *SALVIA, *SALVIA miltiorrhiza, *LAMIACEAE, *VEGETABLE oils
Abstract

Background/Aim. Plant essential oils (EOs) can have a significant antibacterial effect especially through additive or synergistic action as antibiotic adjuvants. We investigated the composition and activity of EOs of two species of genus Salvia (S) from Greece with the aim to determine their antimicrobial activity as well as the activity in combination with selected antibiotics. Methods. The aerial parts of wild-growing S. fruticosa and S. ringens were subjected to a steam distillation and the obtained EOs were analyzed by gas chromatography and gas chromatography/ mass spectrometry. The broth-microdilution method was used in order to determine the minimum inhibitory concentrations (MICs) of EOs on seven strains of bacteria and one yeast. Antimicrobial activity of the combination of EO and antibiotics was investigated by checkerboard method and estimated by calculating fractional inhibitory concentration (FIC) of each component and fractional inhibitory concentration index (FICI). Results. Dominant component of S. fruticosa EO was transthujone (54.2%) and for S. ringens EO it was α-pinene (28.1%). The MICs of EOs of both species were in the range from 200 µg/mL to > 500 µg/mL. The strongest antimicrobial effect was achieved against Bacillus subtilis and Candida albicans. According to FICI values, EO of S. fruticosa had additive effect with ciprofloxacin against most of bacterial strains but not with amikacin. Conclusion. The essential oils of S. ringens and S. fruticosa showed modest antimicrobial activity. However, the essential oil of S. fruticosa showed a promising additive effect in combination with ciprofloxacin. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Composition and antimicrobial activity of essential oils of Salvia fruticosa and Salvia ringens (Lamiaceae)

Author

Danilo Stojanovic, Dušan Ušjak, Marina Milenković, and Mirjana Marčetić

Subjects
Medicine (General), Volatile, salvia ringens, Medicinal, essential oil, Salvia fruticosa, R5-920, Salvia ringens, combination with antibiotics, Pharmacology (medical), ulja, 2. Zero hunger, Lamiaceae, antimicrobial activity, biology, Traditional medicine, biljke, lekovite, salvia fruticosa, etarska, salvia, Plants, plants, medicinal, biology.organism_classification, Antimicrobial, antiinfektivni agensi, oils, volatile, Anti-infective agents, Composition (visual arts), Oils, Apstrakt
Abstract

Background/Aim. Plant essential oils (EOs) can have a significant antibacterial effect especially through additive or synergistic action as antibiotic adjuvants. We investi-gated the composition and activity of EOs of two species of genus Salvia (S) from Greece with the aim to deter-mine their antimicrobial activity as well as the activity in combination with selected antibiotics. Methods. The aerial parts of wild-growing S. fruticosa and S. ringens were subjected to a steam distillation and the obtained EOs were analyzed by gas chromatography and gas chroma-tography/mass spectrometry. The broth-microdilution method was used in order to determine the minimum in-hibitory concentrations (MICs) of EOs on seven strains of bacteria and one yeast. Antimicrobial activity of the combination of EO and antibiotics was investigated by checkerboard method and estimated by calculating frac-tional inhibitory concentration (FIC) of each component and fractional inhibitory concentration index (FICI). Re-sults. Dominant component of S. fruticosa EO was trans-thujone (54.2%) and for S. ringens EO it was α-pinene (28.1%). The MICs of EOs of both species were in the range from 200 μg/mL to > 500 μg/mL. The strongest antimicrobial effect was achieved against Bacillus subtilis and Candida albicans. According to FICI values, EO of S. fruticosa had additive effect with ciprofloxacin against most of bacterial strains but not with amikacin. Conclu-sion. The essential oils of S. ringens and S. fruticosa showed modest antimicrobial activity. However, the es-sential oil of S. fruticosa showed a promising additive ef-fect in combination with ciprofloxacin. Uvod/Cilj. Etarska ulja različitih biljaka mogu imati značajna antibakterijska svojstva, posebno kao adjuvanti antibiotika sa kojima ostvaruju aditivno ili sinergistično dejstvo. Ispitivali smo sastav i aktivnost etarskih ulja dve vrste roda Salvia (S) iz Grčke sa ciljem da odredimo njihovu antimkrobnu aktivnost, kao i dejstvo u kombi-naciji sa odabranim antibioticima. Metode. Nadzemni delovi samoniklih S. fruticosa i S. ringens su destilovani vodenom parom i dobijena etarska ulja su analizirana gasnom hromatografijom i gasnom hromatografijom sa masenom spektrometrijom. Radi određivanja minimalnih inhibitornih koncentracija (MICs) etarskog ulja na sedam sojeva bakterija i na jednoj patogenoj gljivici korišćena je mikrodiluciona metoda. Antimikrobna aktivnost kombi-nacije etarskog ulja i antibiotika ispitana je checkerboard metodom i procenjena je na osnovu frakcione inhibi-torne koncentracije (FIC) svake komponente i indeksa frakcione inhibitorne koncentracije (FICI). Resultati. Dominantna komponenta etarskog ulja S. fruticosa je bio trans-tujon (54,2%), a etarskog ulja S. ringens α-pinen (28,1%). MICs etarskog ulja obe vrste su bile u opsegu od 200 μg/mL do > 500 μg/mL. Najsnažnija anti-mikrobna aktivnost ostvarena je protiv Bacillus subtilis i Candida albicans. Na osnovu FICI vrednosti, etarsko ulje S. fruticosa je sa ciprofloksacinom, ali ne i sa amikacinom imalo aditivni efekat protiv većine bakterijskih sojeva. Zaključak. Etarska ulja S. ringens i S. fruticosa su pokazala skromnu antimikrobnu aktivnost, ali je etarsko ulje S. fru-ticosa u kombinaciji sa ciprofloksacinom ispoljilo značajan aditivni efekat.

Published
2022

3. Antioxidant and cytotoxic activities of curly dock (Rumex crispus L., Polygonaceae) fruit extract

Author

Ćebović, Tatjana, Ćebović, Tatjana, Jakovljević, Dunja, Maksimović, Zoran, Đorđević, Snežana, Jakovljević, Sanja, Četojević-Simin, Dragana, Ćebović, Tatjana, Ćebović, Tatjana, Jakovljević, Dunja, Maksimović, Zoran, Đorđević, Snežana, Jakovljević, Sanja, and Četojević-Simin, Dragana

Abstract

Uvod/Cilj: Rumex crispus (štavelj) je višegodišnja zeljasta biljka, koja se smatra bogatim izvorom biološki aktivnih molekula sa antioksidantnom i citotoksičnom aktivnošću. Cilj rada bio je procena antioksidantnog kapaciteta i ispitivanje antitumorske aktivnosti vodenog ekstrakta ploda štavelja. Metode. Antioksidantna aktivnost vodenog ekstrakta ploda štavelja procenjena je na osnovu in vitro testova: ferric-reducing antioxidant power (FRAP), sposobnosti ekstrakta da neutrališe slobodne radikale NO•, OH• i 2,2-difentil-1-pikril hidrazil (DPPH) i utiče na lipidnu peroksidaciju u lipozomima. Citotoksičnost ispitivanog ekstrakta je određena in vitro na tumorskim ćelijskim linijama: humani karcinom cerviksa (HeLa), adenokarcinom (HT-29) i adenokarcinom dojke (MCF7). Rezultati. Testirani ekstrakt pokazao je potencijalnu antioksidantnu aktivnost manifestovanu velikom moći u neutralizaciji slobodnih radikala, kao i sposobnost da smanji lipidnu peroksidaciju u lipozomima. Ustanovljena je tkivno-selektivnu citotoksičnost ekstrakta ploda štavelja in vitro. Najizraženija antitumorska aktivnost primećena je prema HeLa i MCF7 ćelijskim linijama. Zaključak. Vodeni ekstrakt ploda štavelja ima potencijalnu antioksidantnu i citotoksičnu aktivnost, sa nekrozom kao glavnim mehanizmom indukovane ćelijske smrti. Za dalja istraživanja, preporučuju se i druge metode ekstrakcije ploda štavelja., Background/Aim. Rumex crispus (curly dock) is a wild perennial herbaceous plant, which products are considered as a rich source of biologically active molecules with antioxidant and cytotoxic activities. The aim of this study was to estimate of antioxidant and cytotoxic activities of aqueous extract of curly dock fruits. Methods. The aqueous extract of curly dock fruits was evaluated for its antioxidant activity by in vitro assays for ferric-reducing antioxidant power (FRAP), NO•, OH• and 2,2-diphenyl-1-picrylhydrazyl (DPPH)-free radical scavenging activities and the influence on lipid peroxidation in liposomes. The cytotoxicity of tested extract was examined in vitro in human cervix carcinoma (HeLa), colon adenocarcinoma (HT-29) and breast adenocarcinoma (MCF7) cells. Results. The tested extract showed a potential antioxidant activity manifested in scavenging of free radicals as well as an ability to decrease lipid peroxidation in liposomes. The results indicated tissue-selective cytotoxicity of R. crispus fruit extract in vitro. The most prominent antitumor activity was observed towards HeLa and MCF7 cell lines. Conclusion. The investigated aqueous fruit extract of R. crispus had potential antioxidant and cytotoxic activities, with necrosis as a main mechanism of induced cell-death. Different methods of extraction of R. crispus fruits, apart from aqueous, are recommended for further investigations.

Published
2020

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