Cited by 96Amyotrophic Lateral Sclerosis ResearchNF-κB Signaling PathwaysHereditary Neurological Disorders

Optineurin suppression causes neuronal cell death via NF‐κB pathway

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Akizuki, Mayumi, Yamashita, Hirofumi, Uemura, Kengo, Maruyama, Hirofumi, Kawakami, Hideshi, Ito, Hidefumi, Takahashi, Ryosuke·2013·Journal of Neurochemistry

Abstract

Mutations in more than 10 genes are reported to cause familial amyotrophic lateral sclerosis (ALS). Among these genes, optineurin (OPTN) is virtually the only gene that is considered to cause classical ALS by a loss‐of‐function mutation. Wild‐type optineurin (OPTN WT) suppresses nuclear factor‐kappa B (NF‐κB) activity, but the ALS‐causing mutant OPTN is unable to suppress NF‐κB activity. Therefore, we knocked down OPTN in neuronal cells and examined the resulting NF‐κB activity and phenotype. First, we confirmed the loss of the endogenous OPTN expression after si RNA treatment and found that NF‐κB activity was increased in OPTN‐knockdown cells. Next, we found that OPTN knockdown caused neuronal cell death. Then, overexpression of OPTN WT or OPTN E50K with intact NF‐κB‐suppressive activity, but not overexpression of ALS‐related OPTN mutants, suppressed the neuronal death induced by OPTN knockdown. This neuronal cell death was inhibited by withaferin A, which selectively inhibits NF‐κB activation. Lastly, involvement of the mitochondrial proapoptotic pathway was suggested for neuronal death induced by OPTN knockdown. Taken together, these results indicate that inappropriate NF‐κB activation is the pathogenic mechanism underlying OPTN mutation‐related ALS. image Among the genes for typical amyotrophic lateral sclerosis (ALS) phenotypes, optineurin (OPTN) is virtually the only gene in which a loss‐of‐function mutation is considered as the principal disease mechanism. We found that OPTN knockdown induced neuronal cell death via NF‐κB activation. Furthermore, proapoptotic molecules such as p53 and Bax representing downstream targets of NF‐κB are suggested to be involved in neuronal death.

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Authors
Akizuki, M., Yamashita, H., Uemura, K., Maruyama, H., Kawakami, H., Ito, H., & Takahashi, R.
Affiliations
  • Kyoto University (JP)
  • Hiroshima University (JP)
  • Department of Neurology Kyoto University Graduate School of Medicine Kyoto Japan
Corresponding author
  • Yamashita, Hirofumi
  • Ito, Hidefumi
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2013-06-17
Volume
126
Issue
6
Pages
699-704
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W1993813911
Cited by
96
References
23
Citations by year
2026: 6 · 2025: 4 · 2024: 7 · 2023: 4 · 2022: 7 · 2021: 8 · 2020: 10 · 2019: 5 · 2018: 10 · 2017: 6 · 2016: 9 · 2015: 11 · 2014: 7 · 2013: 2
FWCI
6.13
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (24300132)
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
Keywords
optineurin, amyotrophic lateral sclerosis, NF-κB activation, neuronal cell death, loss-of-function mutations, withaferin A, mitochondrial apoptosis, p53, Bax, siRNA knockdown
MeSH terms
Amyotrophic Lateral Sclerosis, Animals, Antineoplastic Agents, Phytogenic, Cell Count, Cells, Cultured, Coloring Agents, Eye Proteins, Luciferases, Mutation, Neurons, Plasmids, Transfection, Trypan Blue, Tumor Necrosis Factor-alpha, Blotting, Western, Signal Transduction, Genes, p53, NF-kappa B, Cell Death, Genes, Reporter, Cell Cycle Proteins, Membrane Transport Proteins, RNA, Small Interfering, Mice, Withanolides, Real-Time Polymerase Chain Reaction

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