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- W1529196913 abstract "Mutant genes that underlie Mendelian forms of amyotrophic lateral sclerosis (ALS) and biochemical investigations of genetic disease models point to potential driver pathophysiological events involving endoplasmic reticulum (ER) stress and autophagy. Several steps in these cell biological processes are known to be controlled physiologically by small ADP-ribosylation factor (ARF) signaling. Here, we investigated the role of ARF guanine nucleotide exchange factors (GEFs), cytohesins, in models of ALS. Genetic or pharmacological inhibition of cytohesins protects motor neurons <i>in vitro</i> from proteotoxic insults and rescues locomotor defects in a <i>Caenorhabditis elegans</i> model of disease. Cytohesins form a complex with mutant superoxide dismutase 1 (SOD1), a known cause of familial ALS, but this is not associated with a change in GEF activity or ARF activation. ER stress evoked by mutant SOD1 expression is alleviated by antagonism of cytohesin activity. In the setting of mutant SOD1 toxicity, inhibition of cytohesin activity enhances autophagic flux and reduces the burden of misfolded SOD1. These observations suggest that targeting cytohesins may have potential benefits for the treatment of ALS." @default.
- W1529196913 created "2016-06-24" @default.
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- W1529196913 date "2015-06-17" @default.
- W1529196913 modified "2023-10-10" @default.
- W1529196913 title "Inhibition of Cytohesins Protects against Genetic Models of Motor Neuron Disease" @default.
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- W1529196913 doi "https://doi.org/10.1523/jneurosci.5032-13.2015" @default.