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- W3148740062 abstract "Spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease (MJD), is a polyglutamine expansion disease arising from a trinucleotide CAG repeat expansion in exon 10 of the gene ATXN3. There are no effective pharmacological treatments for MJD, thus the identification of new pathogenic mechanisms, and the development of novel therapeutics is urgently needed. In this study, we performed a comprehensive, blind drug screen of 3942 compounds (many FDA approved) and identified small molecules that rescued the motor-deficient phenotype in transgenic ATXN3 Caenorhabditis elegans strain. Out of this screen, five lead compounds restoring motility, protecting against neurodegeneration, and increasing the lifespan in ATXN3-CAG89 mutant worms were identified. These compounds were alfacalcidol, chenodiol, cyclophosphamide, fenbufen, and sulfaphenazole. We then investigated how these molecules might exert their neuroprotective properties. We found that three of these compounds, chenodiol, fenbufen, and sulfaphenazole, act as modulators for TFEB/HLH-30, a key transcriptional regulator of the autophagy process, and require this gene for their neuroprotective activities. These genetic-chemical approaches, using genetic C. elegans models for MJD and the screening, are promising tools to understand the mechanisms and pathways causing neurodegeneration, leading to MJD. Positively acting compounds may be promising candidates for investigation in mammalian models of MJD and preclinical applications in the treatment of this disease." @default.
- W3148740062 created "2021-04-13" @default.
- W3148740062 creator A5011237270 @default.
- W3148740062 creator A5026565665 @default.
- W3148740062 creator A5055407155 @default.
- W3148740062 date "2021-03-29" @default.
- W3148740062 modified "2023-10-02" @default.
- W3148740062 title "Small Molecule Rescue of ATXN3 Toxicity in C. elegans via TFEB/HLH-30" @default.
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- W3148740062 doi "https://doi.org/10.1007/s13311-020-00993-5" @default.
- W3148740062 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8423969" @default.
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- W3148740062 hasPublicationYear "2021" @default.
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