Abstract:
:Autophagy can degrade cargos with the help of selective autophagy receptors such as p62/SQSTM1, which facilitates the degradation of ubiquitinated cargo. While the process of autophagy has been linked to aging, the impact of selective autophagy in lifespan regulation remains unclear. We have recently shown in Caenorhabditis elegans that transcript levels of sqst-1/p62 increase upon a hormetic heat shock, suggesting a role of SQST-1/p62 in stress response and aging. Here, we find that sqst-1/p62 is required for hormetic benefits of heat shock, including longevity, improved neuronal proteostasis, and autophagy induction. Furthermore, overexpression of SQST-1/p62 is sufficient to induce autophagy in distinct tissues, extend lifespan, and improve the fitness of mutants with defects in proteostasis in an autophagy-dependent manner. Collectively, these findings illustrate that increased expression of a selective autophagy receptor is sufficient to induce autophagy, enhance proteostasis and extend longevity, and demonstrate an important role for sqst-1/p62 in proteotoxic stress responses.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kumsta C,Chang JT,Lee R,Tan EP,Yang Y,Loureiro R,Choy EH,Lim SHY,Saez I,Springhorn A,Hoppe T,Vilchez D,Hansen Mdoi
10.1038/s41467-019-13540-4subject
Has Abstractpub_date
2019-12-11 00:00:00pages
5648issue
1issn
2041-1723pii
10.1038/s41467-019-13540-4journal_volume
10pub_type
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