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Allyl alcohol and garlic (Allium sativum) extract produce oxidative stress in Candida albicans

Lemar, Katey M., Passa, Ourania, Aon, Miguel A., Cortassa, Sonia, Müller, Carsten Theodor, Plummer, Sue, O'Rouke, Brian and Lloyd, David 2005. Allyl alcohol and garlic (Allium sativum) extract produce oxidative stress in Candida albicans. Microbiology 151 (10) , pp. 3257-3265. 10.1099/mic.0.28095-0

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Both the growth and respiration of Candida albicans are sensitive to extracts of Allium sativum and investigations into the anticandidal activities are now focussing on the purified constituents to determine the targets of inhibition. Of particular interest is allyl alcohol (AA), a metabolic product that accumulates after trituration of garlic cloves. Putative targets for AA were investigated by monitoring changes in intracellular responses after exposure of C. albicans cells to AA or a commercially available garlic extract. Two-photon laser scanning microscopy and other techniques were used. Changes typical of oxidative stress – NADH oxidation and glutathione depletion, and increased reactive oxygen species – were observed microscopically and by flow cytometry. Known targets for AA are alcohol dehydrogenases Adh1 and 2 (in the cytosol) and Adh3 (mitochondrial), although the significant decrease in NAD(P)H after addition of AA is indicative of another mechanism of action.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Society for General Microbiology
ISSN: 1350-0872
Last Modified: 10 Oct 2017 15:50

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