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Autophagy. 2021 Nov;17(11):3491-3510. doi: 10.1080/15548627.2021.1875611. Epub 2021 Jan 25.

Decrease of neuronal FKBP4/FKBP52 modulates perinuclear lysosomal positioning and MAPT/Tau behavior during MAPT/Tau-induced proteotoxic stress.

Autophagy

Béatrice Chambraud, Corentin Daguinot, Kevin Guillemeau, Melanie Genet, Omar Dounane, Geri Meduri, Christian Poüs, Etienne Emile Baulieu, Julien Giustiniani

Affiliations

  1. INSERM U1195, Université Paris-Saclay, Kremlin-Bicêtre, France.
  2. INSERM UMR-S-1193, Université Paris-Saclay, Châtenay-Malabry, France.
  3. Biochimie-Hormonologie , AP-HP Université Paris-Saclay, Site Antoine Béclère, Clamart, France.

PMID: 33459145 PMCID: PMC8632305 DOI: 10.1080/15548627.2021.1875611

Abstract

Defects of autophagy-lysosomal protein degradation are thought to contribute to the pathogenesis of several neurodegenerative diseases, and the accumulation of aggregation prone proteins such as MAPT/Tau in Alzheimer disease (AD). We previously showed the localization of the immunophilin FKBP4/FKBP52 in the lysosomal system of healthy human neurons suggesting its possible role in lysosome function. We also showed that decreased FKBP4 levels in AD brain neurons correlate with abnormal MAPT accumulation and aggregation. In this study, we demonstrate that FKBP4 decrease in a human neuronal cell line (SH-SY5Y) and in dorsal root ganglion (DRG) neurons from human MAPT

Keywords: Alzheimer disease; FKBP52; Tau; autophagy; lysosomes; proteotoxic stress

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