4.4 Article

Anti-Trichomonas vaginalis activity of essential oils extracted from Caatinga Myrtaceae species and chemical composition of Eugenia pohliana DC.

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NATURAL PRODUCT RESEARCH
卷 37, 期 6, 页码 1042-1046

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TAYLOR & FRANCIS LTD
DOI: 10.1080/14786419.2022.2101050

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Trichomoniasis; Trichomonas vaginalis; essential oil; Myrtaceae; Caatinga

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The study reveals the anti-Trichomonas vaginalis activity of essential oils from Myrtaceae in Caatinga. These oils exhibit varied efficacy against T. vaginalis isolates, with Eugenia pohliana essential oil showing promising selectivity towards vaginal epithelial cells. The combination of this essential oil with metronidazole shows a synergistic effect, indicating different mechanisms of action.
The current trichomoniasis treatment is restrict to 5-nitroimidazole drugs and the emergence of resistant isolates points the need for new therapeutical alternatives. In this study the anti-Trichomonas vaginalis activity of essential oils obtained from Myrtaceae occurring in Caatinga, a plant family with potential antiparasitic activity, was showed. The essential oils varied in their capacity to kill ATCC and fresh clinical T. vaginalis isolates, which was associated with heterogeneity and different patterns of endosymbiosis. Essential oils caused moderate to strong cytotoxicity against mammalian cells, but essential oil of Eugenia pohliana (EOEp) exhibited promising selectivity index towards vaginal epithelial cells. A checkerboard assay revealed a synergistic effect when EOEp and metronidazole were associated, indicating different mechanisms of action. The GC/MS analysis demonstrated the volatile composition of EOEp, with delta-cadinene as majoritary component. This molecule seems to contribute to the trichomonacidal effect and shows potential for the prospection of new antiparasitic compounds.

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