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ANTIOXIDANT ACTIVITY, CHEMICAL COMPOSITION, AND THERAPEUTIC ACTIVITY OF ESSENTIAL OILS FROM CERTAIN LAMIACEAE SPECIES IN TÜRKIYE

CANAN GÖKSU SÜRÜCÜ, BERRAK DUMLUPINAR, BURÇAK GÜRBÜZ, GÖKÇE ŞEKER KARATOPRAK, REYHAN BAHTİYARCA, SELEN İLGÜN

Journal of Research in Pharmacy - 2024;28(6):2292-2313

Plant-Based Food Research Center, Field Crops Central Research Institute, Şehit Cem Ersever Street, Yenimahalle, Ankara, Türkiye

 

The study examined the antioxidant, antimicrobial, and potential anticancer properties of lavandin (Lavandula x intermedia ’Grosso’), oregano (Origanum vulgare ’Uluğ Bey’), and sage (Salvia officinalis ’Beyhekim’) essential oils (EOs). Chemical analysis revealed that oregano is rich in carvacrol (81.23%), cymene (5.51%), and 18- cineole (2.13%). Sage contains notable quantities of α-thujone (17.47%), camphor (13.59%), and borneol (12.14%). Lavandin is predominantly composed of linalool (41.10%), linalyl acetate (16.66%), and camphor (10.01%). The antimicrobial tests demonstrated that lavandin EOs exhibited a high inhibition rate of 90.77% at 1000 μg/mL, which subsequently decreased with lower concentrations. The oregano essential oils demonstrated robust antimicrobial activity across all concentrations, with a 10.97% inhibition rate observed even at the lowest concentration. The sage EOs exhibited a rapid decline in antimicrobial activity, reaching 4.97% at the lowest concentration. Both the DPPH and ABTS assays demonstrated that the antioxidant capacity of the essential oils was concentration-dependent. The cytotoxicity values of oregano essential oil were 35.58 at 50 μg/mL, 32.39 at 25 μg/mL, and 30.92 at 12.5 μg/mL. Similar cytotoxicity results were observed for sage and lavandin essential oils. These findings indicate that plant essential oils exert a dose-dependent cytotoxic effect on cell growth, significantly inhibiting cells at high concentrations. The research indicates that essential oils derived from Lamiaceae plants exhibit robust antimicrobial effects against a range of pathogens, suggesting potential applications as alternative therapies for specific microbial infections, comparable to ciprofloxacin at certain concentrations.