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- W2116633214 abstract "Inherited deficiency in the mitochondrial protein frataxin (FXN) causes the rare disease Friedreich's ataxia (FA), for which there is no successful treatment. We identified a redox deficiency in FA cells and used this to model the disease. We screened a 1600-compound library to identify existing drugs, which could be of therapeutic benefit. We identified the topical anesthetic dyclonine as protective. Dyclonine increased FXN transcript and FXN protein dose-dependently in FA cells and brains of animal models. Dyclonine also rescued FXN-dependent enzyme deficiencies in the iron–sulfur enzymes, aconitase and succinate dehydrogenase. Dyclonine induces the Nrf2 [nuclear factor (erythroid-derived 2)-like 2] transcription factor, which we show binds an upstream response element in the FXN locus. Additionally, dyclonine also inhibited the activity of histone methyltransferase G9a, known to methylate histone H3K9 to silence FA chromatin. Chronic dosing in a FA mouse model prevented a performance decline in balance beam studies. A human clinical proof-of-concept study was completed in eight FA patients dosed twice daily using a 1% dyclonine rinse for 1 week. Six of the eight patients showed an increase in buccal cell FXN levels, and fold induction was significantly correlated with disease severity. Dyclonine represents a novel therapeutic strategy that can potentially be repurposed for the treatment of FA." @default.
- W2116633214 created "2016-06-24" @default.
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- W2116633214 date "2014-08-11" @default.
- W2116633214 modified "2023-10-01" @default.
- W2116633214 title "Dyclonine rescues frataxin deficiency in animal models and buccal cells of patients with Friedreich's ataxia" @default.
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- W2116633214 doi "https://doi.org/10.1093/hmg/ddu408" @default.
- W2116633214 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4245046" @default.
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- W2116633214 hasPublicationYear "2014" @default.
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