Cited by 89Parkinson's Disease Mechanisms and TreatmentsAutophagy in Disease and TherapyCalcium signaling and nucleotide metabolism

BAX channel activity mediates lysosomal disruption linked to Parkinson disease

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Bové, Jordi, Martínez-Vicente, Marta, Dehay, Benjamin, Perier, Celine, Recasens, Ariadna, Bombrun, Agnes, Antonsson, Bruno, Vila, Miquel·2014·Autophagy

Abstract

Lysosomal disruption is increasingly regarded as a major pathogenic event in Parkinson disease (PD). A reduced number of intraneuronal lysosomes, decreased levels of lysosomal-associated proteins and accumulation of undegraded autophagosomes (AP) are observed in PD-derived samples, including fibroblasts, induced pluripotent stem cell-derived dopaminergic neurons, and post-mortem brain tissue. Mechanistic studies in toxic and genetic rodent PD models attribute PD-related lysosomal breakdown to abnormal lysosomal membrane permeabilization (LMP). However, the molecular mechanisms underlying PD-linked LMP and subsequent lysosomal defects remain virtually unknown, thereby precluding their potential therapeutic targeting. Here we show that the pro-apoptotic protein BAX (BCL2-associated X protein), which permeabilizes mitochondrial membranes in PD models and is activated in PD patients, translocates and internalizes into lysosomal membranes early following treatment with the parkinsonian neurotoxin MPTP, both in vitro and in vivo, within a time-frame correlating with LMP, lysosomal disruption, and autophagosome accumulation and preceding mitochondrial permeabilization and dopaminergic neurodegeneration. Supporting a direct permeabilizing effect of BAX on lysosomal membranes, recombinant BAX is able to induce LMP in purified mouse brain lysosomes and the latter can be prevented by pharmacological blockade of BAX channel activity. Furthermore, pharmacological BAX channel inhibition is able to prevent LMP, restore lysosomal levels, reverse AP accumulation, and attenuate mitochondrial permeabilization and overall nigrostriatal degeneration caused by MPTP, both in vitro and in vivo. Overall, our results reveal that PD-linked lysosomal impairment relies on BAX-induced LMP, and point to small molecules able to block BAX channel activity as potentially beneficial to attenuate both lysosomal defects and neurodegeneration occurring in PD.

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Authors
Bové, J., Martínez-Vicente, M., Dehay, B., Perier, C., Recasens, A., Bombrun, A., Antonsson, B., & Vila, M.
Affiliations
  • Biomedical Research Networking Center on Neurodegenerative Diseases (ES)
  • Merck Serono S.A. (Switzerland) (CH)
  • Institució Catalana de Recerca i Estudis Avançats (ES)
Corresponding author
Vila, Miquel
Venue
Autophagy
Published
2014-03-26
Volume
10
Issue
5
Pages
889-900
ISSN
  • 1554-8627 (ISSN-L)
  • 1554-8635
OpenAlex
W1978412530
Cited by
89
References
42
Citations by year
2026: 6 · 2025: 4 · 2024: 3 · 2023: 4 · 2022: 11 · 2021: 10 · 2020: 10 · 2019: 7 · 2018: 9 · 2017: 10 · 2016: 6 · 2015: 7 · 2014: 2
FWCI
5.44
Type
journal article
Language
en
Open access
Locations
  • Autophagy (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • HAL (submittedVersion)
  • Figshare (cc-by)
Funders
  • European Commission
  • Instituto de Salud Carlos III
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
Parkinson's disease, Bax, lysosomal membrane permeabilization, lysosomal disruption, autophagosome accumulation, MPTP, mitochondrial membrane permeabilization, dopaminergic neuron loss, Bcl-2 family proteins, nigrostriatal degeneration
MeSH terms
Animals, Brain, Cells, Cultured, Humans, Intracellular Membranes, Ion Channels, Lysosomes, Male, Mice, Inbred C57BL, Parkinson Disease, Permeability, 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine, Protein Transport, bcl-2-Associated X Protein, Mice

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