Dataset Information

Immunophilin FKBP52 induces Tau-P301L filamentous assembly in vitro and modulates its activity in a model of tauopathy.

ABSTRACT: The Tau protein is the major component of intracellular filaments observed in a number of neurodegenerative diseases known as tauopathies. The pathological mutant of Tau containing a proline-to-leucine mutation at position 301 (P301L) leads to severe human tauopathy. Here, we assess the impact of FK506-binding protein with a molecular mass of ?52 kDa (FKBP52), an immunophilin protein that interacts with physiological Tau, on Tau-P301L activity. We identify a direct interaction of FKBP52 with Tau-P301L and its phosphorylated forms and demonstrate FKBP52's ability to induce the formation of Tau-P301L oligomers. EM analysis shows that Tau-P301L oligomers, induced by FKBP52, can assemble into filaments. In the transgenic zebrafish expressing the human Tau-P301L mutant, FKBP52 knockdown is sufficient to redrive defective axonal outgrowth and branching related to Tau-P301L expression in spinal primary motoneurons. This result correlates with a significant reduction of pT181 pathological phosphorylated Tau and with recovery of the stereotypic escape response behavior. Collectively, FKBP52 appears to be an endogenous candidate that directly interacts with the pathogenic Tau-P301L and modulates its function in vitro and in vivo.

SUBMITTER: Giustiniani J

PROVIDER: S-EPMC3970538 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

Immunophilin FKBP52 induces Tau-P301L filamentous assembly in vitro and modulates its activity in a model of tauopathy.

Giustiniani Julien J Chambraud Béatrice B Sardin Elodie E Dounane Omar O Guillemeau Kevin K Nakatani Hiroko H Paquet Dominik D Kamah Amina A Landrieu Isabelle I Lippens Guy G Baulieu Etienne-Emile EE Tawk Marcel M

Proceedings of the National Academy of Sciences of the United States of America 20140312 12

The Tau protein is the major component of intracellular filaments observed in a number of neurodegenerative diseases known as tauopathies. The pathological mutant of Tau containing a proline-to-leucine mutation at position 301 (P301L) leads to severe human tauopathy. Here, we assess the impact of FK506-binding protein with a molecular mass of ∼52 kDa (FKBP52), an immunophilin protein that interacts with physiological Tau, on Tau-P301L activity. We identify a direct interaction of FKBP52 with Tau ...[more]

PMID: 24623856

Similar Datasets

Project description: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 MAPTP301S transgenic mice affected the function of the autophagy-lysosomal system under MAPT induced proteotoxic stress conditions. We show that acute MAPT accumulation in SH-SY5Y cells induced perinuclear clustering of lysosomes, triggered FKBP4 localization around the clusters and its colocalization with MAPT and MAP1LC3/LC3-positive autophagic vesicles; a similar FKBP4 localization was detected in some AD brain neurons. We demonstrate that FKBP4 decrease altered lysosomal clustering along with MAPT and MAP1LC3 secretion increase. Although ectopic FKBP4 expression could not induce autophagy under our experimental conditions, it prevented MAPT secretion after MAPT accumulation in SH-SY5Y cells implying a regulatory role of FKBP4 on MAPT secretion. Finally, we observe that FKBP4 deficiency decreased MAP1LC3-II expression and provoked MAPT accumulation during long-term stress in mouse DRG neurons. We hypothesize that the abnormal FKBP4 decrease observed in AD brain neurons might hinder autophagy efficiency and contribute to the progression of the tauopathy by modulating MAPT secretion and accumulation during MAPT pathogenesis.Abbreviations: AD: Alzheimer disease; AKT/protein kinase B: AKT serine/threonine kinase; ALP: Autophagy-lysosomal pathway; ATG: autophagy-related; BafA1: bafilomycin A1; CQ: chloroquine; CTSD: cathepsin D; DIV: days in vitro; DRG: dorsal root ganglion neurons; Dox: doxycycline; DNAJC5: DnaJ heat shock protein family (Hsp40) member C5; EL: empty lentiviral vectors; ENO2/NSE: enolase 2, gamma neuronal; FKBP4/FKBP52: FKBP prolyl isomerase 4; FTLD-Tau: frontotemporal lobar degeneration with Tau pathology; GFP: green fluorescent protein; LAMP1: lysosomal associated membrane protein 1; LDH: lactate dehydrogenase; MAP1LC3/LC3: microtubule associated protein 1 light chain 3; MAPT/Tau: microtubule associated protein tau; MTT: tetrazolium salt; NFTs: neurofibrillary tangles; RPE-1: retinal pigment epithelial cells; shRNA: small-hairpin ribonucleic acid; SQSTM1/p62: sequestosome 1; SD: standard deviation; SEM: standard error of the mean; SH-SY5Y: human neuroblastoma cells; Sh1 or Sh2: Lentiviral shRNA vectors inducing FKBP4 decrease; SH-52GFP: MAPT/Tau-inducible SH-SY5Y cell line constitutively expressing FKBP4-GFP; TUBB3/βIII tubulin: tubulin beta 3 class III; UPS: ubiquitin-proteasome system.

Dataset Information

Immunophilin FKBP52 induces Tau-P301L filamentous assembly in vitro and modulates its activity in a model of tauopathy.

Publications

Immunophilin FKBP52 induces Tau-P301L filamentous assembly in vitro and modulates its activity in a model of tauopathy.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets