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Inhibiting mitochondrial phosphate transport as an unexploited antifungal strategy
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Journal Article
Inhibiting mitochondrial phosphate transport as an unexploited antifungal strategy
2018
Overview
The development of effective antifungal therapeutics remains a formidable challenge because of the close evolutionary relationship between humans and fungi. Mitochondrial function may present an exploitable vulnerability because of its differential utilization in fungi and its pivotal roles in fungal morphogenesis, virulence, and drug resistance already demonstrated by others. We now report mechanistic characterization of ML316, a thiohydantoin that kills drug-resistant Candida species at nanomolar concentrations through fungal-selective inhibition of the mitochondrial phosphate carrier Mir1. Using genetic, biochemical, and metabolomic approaches, we established ML316 as the first Mir1 inhibitor. Inhibition of Mir1 by ML316 in respiring yeast diminished mitochondrial oxygen consumption, resulting in an unusual metabolic catastrophe marked by citrate accumulation and death. In a mouse model of azole-resistant oropharyngeal candidiasis, ML316 reduced fungal burden and enhanced azole activity. Targeting Mir1 could provide a new, much-needed therapeutic strategy to address the rapidly rising burden of drug-resistant fungal infection.
Publisher
Nature Publishing Group
Subject
