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• W3201596890 abstract "Limb-girdle muscular dystrophy D2 (LGMDD2) is an ultrarare autosomal dominant myopathy caused by mutation of the normal stop codon of the TNPO3 nuclear importin. The mutant protein carries a 15 amino acid C-terminal extension associated with pathogenicity. Here we report the first animal model of the disease by expressing the human mutant TNPO3 gene in Drosophila musculature or motor neurons and concomitantly silencing the endogenous expression of the fly protein ortholog. A similar genotype expressing wildtype TNPO3 served as a control. Phenotypes characterization revealed that mutant TNPO3 expression targeted at muscles or motor neurons caused LGMDD2-like phenotypes such as muscle degeneration and atrophy, and reduced locomotor ability. Notably, LGMDD2 mutation increase TNPO3 at the transcript and protein level in the Drosophila model Upregulated muscle autophagy observed in LGMDD2 patients was also confirmed in the fly model, in which the anti-autophagic drug chloroquine was able to rescue histologic and functional phenotypes. Overall, we provide a proof of concept of autophagy as a target to treat disease phenotypes and propose a neurogenic component to explain mutant TNPO3 pathogenicity in diseased muscles." @default.
• W3201596890 created "2021-09-27" @default.
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• W3201596890 date "2021-09-21" @default.
• W3201596890 modified "2023-09-25" @default.
• W3201596890 title "Inhibition of autophagy rescues muscle atrophy in a LGMDD2 <i>Drosophila</i> model" @default.
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• W3201596890 doi "https://doi.org/10.1096/fj.202100539rr" @default.
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• W3201596890 hasPublicationYear "2021" @default.
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