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Updated: Oct 27, 2025

Fractionation for Resolution of Soluble and Insoluble Huntingtin Species
Published on: February 27, 2018
SQSTM1/p62 droplet -mediated autophagosome formation:insights into Huntington disease
Junsheng Yang1, Xiaoli Chen1, Huilin Xu1
1Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China.
Abstract:
Huntington disease (HD) manifests a unique macroautophagy/autophagy defect: the presense of cytosolic autophagosomes without substrates or so-called "empty" autophagosomes. It was proposed that mutant HTT (huntingtin; mHTT) disrupts cargo recognition by the selective autophagy receptor SQSTM1/p62 thus leading to the failure of cargo sequestration by phagophores, the precursors to autophagosomes. Here we looked at recent discoveries that liquid-like SQSTM1 droplets can serve as platforms for autophagosome formation, and discussed possible alternative mechanisms for "empty" autophagosome formation in HD inspired by these findings.
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