Signaling, polyubiquitination, trafficking, and inclusions: sequestosome 1/p62's role in neurodegenerative disease.

TLDR: In this paper, the role of p62's role in signaling, aggregation, and inclusion formation, and specifically as a possible contributor to Alzheimer's disease, is reviewed and p62 is used as a potential target for the development of therapeutics and as a disease biomarker.

Abstract: Aggregated misfolded proteins are hallmarks of most neurodegenerative diseases In a chronic disease state, including pathologic situations of oxidative stress, these proteins are sequestered into inclusions Accumulation of aggregated proteins can be prevented by chaperones, or by targeting their degradation to the UPS If the accumulation of these proteins exceeds their degradation, they may impair the function of the proteasome Alternatively, the function of the proteasome may be preserved by directing aggregated proteins to the autophagy-lysosome pathway for degradation Sequestosome 1/p62 has recently been shown to interact with polyubiquitinated proteins through its UBA domain and may direct proteins to either the UPS or autophagosome P62 is present in neuronal inclusions of individuals with Alzheimer's disease and other neurodegenerative diseases Herein, we review p62's role in signaling, aggregation, and inclusion formation, and specifically as a possible contributor to Alzheimer's disease The use of p62 as a potential target for the development of therapeutics and as a disease biomarker is also discussed