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Activities of Ten Essential Oils towards Propionibacterium acnes and PC-3, A-549 and MCF-7 Cancer Cells

Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Molecules (Impact Factor: 2.42). 05/2010; 15(5):3200-10. DOI: 10.3390/molecules15053200
Source: PubMed

ABSTRACT Ten essential oils, namely, mint (Mentha spicata L., Lamiaceae), ginger (Zingiber officinale Rosc., Zingiberaceae), lemon (Citrus limon Burm.f., Rutaceae), grapefruit (Citrus paradisi Macf., Rutaceae), jasmine (Jasminum grandiflora L., Oleaceae), lavender (Mill., Lamiaceae), chamomile (Matricaria chamomilla L., Compositae), thyme (Thymus vulgaris L., Lamiaceae), rose (Rosa damascena Mill., Rosaceae) and cinnamon (Cinnamomum zeylanicum N. Lauraceae) were tested for their antibacterial activities towards Propionibacterium acnes and in vitro toxicology against three human cancer cell lines. Thyme, cinnamon and rose essential oils exhibited the best antibacterial activities towards P. acnes, with inhibition diameters of 40 +/- 1.2 mm, 33.5 +/- 1.5 mm and 16.5 +/- 0.7 mm, and minimal inhibitory concentrations of 0.016% (v/v), 0.016% (v/v) and 0.031% (v/v), respectively. Time-kill dynamic procedures showed that thyme, cinnamon, rose, and lavender essential oils exhibited the strongest bactericidal activities at a concentration of 0.25% (v/v), and P. acnes was completely killed after 5 min. The thyme essential oil exhibited the strongest cytotoxicity towards three human cancer cells. Its inhibition concentration 50% (IC(50)) values on PC-3, A549 and MCF-7 tumor cell lines were 0.010% (v/v), 0.011% (v/v) and 0.030% (v/v), respectively. The cytotoxicity of 10 essential oils on human prostate carcinoma cell (PC-3) was significantly stronger than on human lung carcinoma (A549) and human breast cancer (MCF-7) cell lines.

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    • "and attracted much attention as complementary and alternative therapy (Zu et al., 2010). Additionally, they offer potential novel template molecules and mixtures of bioactive compounds that can be exploited industrially as bio-products for both the wellness , pharmaceutical and food industry. "
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    ABSTRACT: The aim of this study was to evaluate the antimicrobial properties of essential oils (EOs) isolated from 7 exotic and 2 endemic medicinal plants of Mauritius. Eighteen microorganisms (bacterial and fungal isolates) have been used to evaluate the antimicrobial potential of the EOs as well as their ability to potentiate conventional antibiotics. Significant antibacterial activities were recorded with low minimal inhibitory concentration for 8 of the EOs using the microbroth dilution assay except for Salvia officinalis, where the activity recorded was comparable to that of the antibiotics. The synergistic effect of the EOs of Pimenta dioica, Psiadia arguta and Piper betle were observed against Escherichia coli and Staphylococcus epidermidis when combined with gentamicin. The fungicidal and fungistatic effect of the EOs were observed among all the fungi irrespective of the family except for Trichophyton mentagrophytes. Forty three major compounds were identified using the gas chromatography–mass spectrometry method and predominantly composed of oxygenated monoterpenes at a dose ranging from 0.45% to 69.76%, while, in the case of P. dioica, the EO was predominantly composed of aromatic compounds at a dose of 89.22%. This study has provided key information on the antimicrobial property and phytochemical composition of some tropical medicinal plants from Mauritius.
    Industrial Crops and Products 09/2015; 71. DOI:10.1016/j.indcrop.2015.03.058 · 2.84 Impact Factor
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    • "Two thyme extracts, ExTs and ExTv, exhibited a comparable effect on MCF-7/Adr cells reaching EC 50 values around 400 mg/l, which was in-between the results obtained for ExMp (with nearly 2-fold lower toxicity) and ExMh (showing nearly 2-fold higher toxicity ) (Table 1a). The only fraction of the herb, investigated on this cell line, have been essential oils, which turned out to exhibit the highest level of toxicity in comparison with the essential oils derived from other species (cinnamon, rose, and lavender) as observed by Fu et al. (2010). When the impact of the studied herb extracts and their phytochemical constituents on the wild-type and resistant MCF-7 cell lines was compared, the reversed pattern was obtained in the case of aqueous extracts and purified phenolics. "
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