Preventing mutant huntingtin proteolysis and intermittent fasting promote autophagy in models of Huntington disease

Dagmar E Ehrnhoefer, Dale D O Martin, Mandi E Schmidt, Xiaofan Qiu, Safia Ladha, Nicholas S Caron, Niels H Skotte, Yen T N Nguyen, Kuljeet Vaid, Amber L Southwell, Sabine Engemann, Sonia Franciosi & Michael R Hayden
Huntington disease (HD) is caused by the expression of mutant huntingtin (mHTT) bearing a polyglutamine expansion. In HD, mHTT accumulation is accompanied by a dysfunction in basal autophagy, which manifests as specific defects in cargo loading during selective autophagy. Here we show that the expression of mHTT resistant to proteolysis at the caspase cleavage site D586 (C6R mHTT) increases autophagy, which may be due to its increased binding to the autophagy adapter p62. This is...
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