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Bioorg Med Chem Lett. 2007 Mar 1;17(5):1221-5. Epub 2006 Dec 12.

Discovery of uracil-based histone deacetylase inhibitors able to reduce acquired antifungal resistance and trailing growth in Candida albicans.

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Istituto Pasteur-Fondazione Cenci Bolognetti, Dipartimento di Studi Farmaceutici, Università degli Studi di Roma La Sapienza, P.le A. Moro 5, 00185 Roma, Italy.


Among fungal pathogens such as Candida albicans, acquired drug resistance has not been associated with plasmids or other transferable elements, but it is thought to involve primarily mutations and genetic or epigenetic phenomena. This prompted us to test some histone deacetylase inhibitors (HDACi) from our library, in combination with fluconazole, against C. albicans strains in vitro. Among the tested compounds, the two chloro-containing uracil-hydroxamates 1c and 1d showed a strong reduction of the MIC values on Candida strains that show the trailing growth effect. In this assay, 1c,d were more potent than SAHA, a well-known HDAC inhibitor, in reducing the Candida growth. More interestingly, 1c,d as well as SAHA were able to inhibit the fluconazole-induced resistance induction in Candida cultures.

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