Autophagy in Huntington disease and huntingtin in autophagy

DDO Martin, S Ladha, DE Ehrnhoefer… - Trends in neurosciences, 2015 - cell.com
Trends in neurosciences, 2015cell.com
Autophagy is an important biological process that is essential for the removal of damaged
organelles and toxic or aggregated proteins by delivering them to the lysosome for
degradation. Consequently, autophagy has become a primary target for the treatment of
neurodegenerative diseases that involve aggregating proteins. In Huntington disease (HD),
an expansion of the polyglutamine (polyQ) tract in the N-terminus of the huntingtin (HTT)
protein leads to protein aggregation. However, HD is unique among the neurodegenerative …
Autophagy is an important biological process that is essential for the removal of damaged organelles and toxic or aggregated proteins by delivering them to the lysosome for degradation. Consequently, autophagy has become a primary target for the treatment of neurodegenerative diseases that involve aggregating proteins. In Huntington disease (HD), an expansion of the polyglutamine (polyQ) tract in the N-terminus of the huntingtin (HTT) protein leads to protein aggregation. However, HD is unique among the neurodegenerative proteinopathies in that autophagy is not only dysfunctional but wild type (wt) HTT also appears to play several roles in regulating the dynamics of autophagy. Herein, we attempt to integrate the recently described novel roles of wtHTT and altered autophagy in HD.
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