Reference: Schneider-Berlin KR, et al. (2005) Induction of petite mutants in yeast Saccharomyces cerevisiae by the anticancer drug dequalinium. Mutat Res 572(1-2):84-97

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Abstract


Dequalinium (DEQ), a drug with both antimicrobial and anticancer activity, induced the formation of petite (respiration-deficient) mutants in the yeast Saccharomyces cerevisiae. DEQ was found to be approximately 50-fold more potent than ethidium bromide (EB) at inducing petites. Analysis of the DEQ-induced petite mutants indicated a complete loss of mitochondrial DNA (<1 copy/cell). Prior to the loss of mtDNA, DEQ caused cleavage of the mtDNA into a population of fragments 30-40kbp in size suggesting that this drug causes petites by inducing a breakdown of mtDNA. The selective effect of DEQ on yeast mtDNA may underlie the antifungal activity of this chemotherapeutic agent.

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Journal Article | Research Support, U.S. Gov't, P.H.S.
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Schneider-Berlin KR, Bonilla TD, Rowe TC
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