Autophagic receptor p62 protects against glycation-derived toxicity and enhances viability

Gemma Aragonès, Kalavathi Dasuri, Opeoluwa Olukorede, Sarah G. Francisco, Carol Renneburg, Caroline Kumsta, Malene Hansen, Shun Kageyama, Masaaki Komatsu, Sheldon Rowan, Jonathan Volkin, Michael Workman, Wenxin Yang, Paula Daza, Diego Ruano, Helena Dominguez-Martín, José Antonio Rodríguez-Navarro, Xue Liang Du, Michael A. Brownlee, Eloy BejaranoAllen Taylor

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Diabetes and metabolic syndrome are associated with the typical American high glycemia diet and result in accumulation of high levels of advanced glycation end products (AGEs), particularly upon aging. AGEs form when sugars or their metabolites react with proteins. Associated with a myriad of age-related diseases, AGEs accumulate in many tissues and are cytotoxic. To date, efforts to limit glycation pharmacologically have failed in human trials. Thus, it is crucial to identify systems that remove AGEs, but such research is scanty. Here, we determined if and how AGEs might be cleared by autophagy. Our in vivo mouse and C. elegans models, in which we altered proteolysis or glycative burden, as well as experiments in five types of cells, revealed more than six criteria indicating that p62-dependent autophagy is a conserved pathway that plays a critical role in the removal of AGEs. Activation of autophagic removal of AGEs requires p62, and blocking this pathway results in accumulation of AGEs and compromised viability. Deficiency of p62 accelerates accumulation of AGEs in soluble and insoluble fractions. p62 itself is subject to glycative inactivation and accumulates as high mass species. Accumulation of p62 in retinal pigment epithelium is reversed by switching to a lower glycemia diet. Since diminution of glycative damage is associated with reduced risk for age-related diseases, including age-related macular degeneration, cardiovascular disease, diabetes, Alzheimer's, and Parkinson's, discovery of methods to limit AGEs or enhance p62-dependent autophagy offers novel potential therapeutic targets to treat AGEs-related pathologies.

Original languageEnglish (US)
Article numbere13257
JournalAging cell
Volume19
Issue number11
DOIs
StatePublished - Nov 2020
Externally publishedYes

Keywords

  • aging
  • autophagy
  • glycative stress
  • p62
  • proteotoxicity

ASJC Scopus subject areas

  • Aging
  • Cell Biology

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