Cited by 129Alzheimer's disease research and treatmentsAutophagy in Disease and TherapyParkinson's Disease Mechanisms and Treatments

NH2-truncated human tau induces deregulated mitophagy in neurons by aberrant recruitment of Parkin and UCHL-1: implications in Alzheimer's disease

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Corsetti, V., Florenzano, F., Atlante, A., Bobba, A., Ciotti, M.T., Natale, F., Della Valle, F., Borreca, A. +10 more·2015·Human Molecular Genetics

Abstract

Disarrangement in functions and quality control of mitochondria at synapses are early events in Alzheimer's disease (AD) pathobiology. We reported that a 20-22 kDa NH2-tau fragment mapping between 26 and 230 amino acids of the longest human tau isoform (aka NH2htau): (i) is detectable in cellular and animal AD models, as well in synaptic mitochondria and cerebrospinal fluids (CSF) from human AD subjects; (ii) is neurotoxic in primary hippocampal neurons; (iii) compromises the mitochondrial biology both directly, by inhibiting the ANT-1-dependent ADP/ATP exchange, and indirectly, by impairing their selective autophagic clearance (mitophagy). Here, we show that the extensive Parkin-dependent turnover of mitochondria occurring in NH2htau-expressing post-mitotic neurons plays a pro-death role and that UCHL-1, the cytosolic Ubiquitin-C-terminal hydrolase L1 which directs the physiological remodeling of synapses by controlling ubiquitin homeostasis, critically contributes to mitochondrial and synaptic failure in this in vitro AD model. Pharmacological or genetic suppression of improper mitophagy, either by inhibition of mitochondrial targeting to autophagosomes or by shRNA-mediated silencing of Parkin or UCHL-1 gene expression, restores synaptic and mitochondrial content providing partial but significant protection against the NH2htau-induced neuronal death. Moreover, in mitochondria from human AD synapses, the endogenous NH2htau is stably associated with Parkin and with UCHL-1. Taken together, our studies show a causative link between the excessive mitochondrial turnover and the NH2htau-induced in vitro neuronal death, suggesting that pathogenetic tau truncation may contribute to synaptic deterioration in AD by aberrant recruitment of Parkin and UCHL-1 to mitochondria making them more prone to detrimental autophagic clearance.

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Authors
Corsetti, V., Florenzano, F., Atlante, A., Bobba, A., Ciotti, M. T., Natale, F., Della Valle, F., Borreca, A., Manca, A., Meli, G., Ferraina, C., Feligioni, M., D'Aguanno, S., Bussani, R., Ammassari-Teule, M., Nicolin, V., Calissano, P., & Amadoro, G.
Affiliations
  • Istituto di Farmacologia Traslazionale (IT)
  • European Brain Research Institute (IT)
  • Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies (IT)
  • Fondazione Santa Lucia (IT)
  • Ospedale di Cattinara (IT)
  • University of Trieste (IT)
Corresponding author
Amadoro, G.
Venue
Human Molecular Genetics
Published
2015-02-15
Volume
24
Issue
11
Pages
3058-3081
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2110862168
Cited by
129
References
161
Citations by year
2026: 9 · 2025: 7 · 2024: 11 · 2023: 12 · 2022: 14 · 2021: 22 · 2020: 14 · 2019: 10 · 2018: 10 · 2017: 9 · 2016: 7 · 2015: 4
FWCI
7.36
Type
journal article
Language
en
Open access
Locations
  • Human Molecular Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • ArTS Archivio della ricerca di Trieste (University of Trieste https://www.units.it/) (submittedVersion, other-oa)
Funders
  • Fondazione Roma (2010M2JARJ-003)
  • Directorate for Biological Sciences
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
Keywords
tau truncation, Alzheimer's disease, mitophagy, Parkin, UCHL1, synaptic mitochondria, neuronal cell death, mitochondrial quality control, autophagy, ubiquitin homeostasis, ADP/ATP exchange, hippocampal neurons, cerebrospinal fluid biomarkers
MeSH terms
Alzheimer Disease, Animals, HeLa Cells, Humans, Mice, Inbred C57BL, Mice, Transgenic, Neurons, tau Proteins, Rats, Wistar, Protein Transport, Mitochondrial Proteins, Ubiquitin Thiolesterase, Ubiquitin-Protein Ligases, Mitophagy

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