Cited by 202Autophagy in Disease and TherapyHereditary Neurological DisordersGlycogen Storage Diseases and Myoclonus

Defective autophagy in neurons and astrocytes from mice deficient in PI(3,5)P2

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Ferguson, Cole J., Lenk, Guy M., Meisler, Miriam H.·2009·Human Molecular Genetics

Abstract

Mutations affecting the conversion of PI3P to the signaling lipid PI(3,5)P(2) result in spongiform degeneration of mouse brain and are associated with the human disorders Charcot-Marie-Tooth disease and amyotrophic lateral sclerosis (ALS). We now report accumulation of the proteins LC3-II, p62 and LAMP-2 in neurons and astrocytes of mice with mutations in two components of the PI(3,5)P(2) regulatory complex, Fig4 and Vac14. Cytoplasmic inclusion bodies containing p62 and ubiquinated proteins are present in regions of the mutant brain that undergo degeneration. Co-localization of p62 and LAMP-2 in affected cells indicates that formation or recycling of the autolysosome is impaired. These results establish a role for PI(3,5)P(2) in autophagy in the mammalian central nervous system (CNS) and demonstrate that mutations affecting PI(3,5)P(2) can contribute to inclusion body disease.

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Authors
Ferguson, C. J., Lenk, G. M., & Meisler, M. H.
Affiliations
University of Michigan (US)
Corresponding author
Meisler, Miriam H.
Venue
Human Molecular Genetics
Published
2009-09-29
Volume
18
Issue
24
Pages
4868-4878
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2135384508
Cited by
202
References
44
Citations by year
2026: 5 · 2025: 5 · 2024: 4 · 2023: 14 · 2022: 12 · 2021: 13 · 2020: 13 · 2019: 14 · 2018: 9 · 2017: 15 · 2016: 7 · 2015: 11 · 2014: 20 · 2013: 15 · 2012: 21
FWCI
10.07
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Human Molecular Genetics (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • Hartwell Foundation
  • National Institutes of Health
  • National Institute of General Medical Sciences (T 32 GM07863, T32GM007863, R01GM024872, R01-GM24872, T32GM008322)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
Keywords
PI(3,5)P2, autophagy, neurons, astrocytes, FIG4, VAC14, LC3-II, p62, LAMP2, autolysosomes, spongiform degeneration, Charcot-Marie-Tooth disease, amyotrophic lateral sclerosis, inclusion bodies, ubiquitinated proteins, central nervous system
MeSH terms
Phosphoinositide Phosphatases, Amyotrophic Lateral Sclerosis, Animals, Astrocytes, Autophagy, Brain, Inclusion Bodies, Charcot-Marie-Tooth Disease, DNA-Binding Proteins, Flavoproteins, Humans, Mice, Mutant Strains, Microtubule-Associated Proteins, Neurons, Transcription Factors, Up-Regulation, Phosphatidylinositol Phosphates, Ubiquitin, Mice, Transcription Factor TFIIH, Lysosomal-Associated Membrane Protein 2

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