Reference: Kolaczkowski M, et al. (2003) Phenothiazines as potent modulators of yeast multidrug resistance. Int J Antimicrob Agents 22(3):279-83

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Abstract

Active efflux of antifungal, antibacterial and anticancer drugs by broad-specificity multidrug resistance (MDR) transporters are major obstacles to successful chemotherapy of infectious diseases and cancer. We evaluated the growth inhibitory and MDR modulatory effect of a series of 36 phenothiazines and related compounds, against Saccharomyces cerevisiae strains exhibiting different levels of expression of MDR transporters Pdr5p, Snq2p and Yor1p. Several newly synthesized derivatives were identified as substrates of Pdr5p as their growth inhibitory properties were potentiated by deletion of PDR5. They were synergistic with the antifungal ketoconazole at micromolar concentrations. The most active phenothiazines contained the amino group at the end of the alkylene chain substituent.

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Journal Article
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Kolaczkowski M, Michalak K, Motohashi N
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