Cited by 84Amyotrophic Lateral Sclerosis ResearchAlzheimer's disease research and treatmentsHereditary Neurological Disorders

Heterozygous Tbk1 loss has opposing effects in early and late stages of ALS in mice

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Brenner, David, Sieverding, Kirsten, Bruno, Clara, Lüningschrör, Patrick, Buck, Eva, Mungwa, Simon, Fischer, Lena, Brockmann, Sarah J. +13 more·2019·Journal of Experimental Medicine

Abstract

Heterozygous loss-of-function mutations of TANK-binding kinase 1 (TBK1) cause familial ALS, yet downstream mechanisms of TBK1 mutations remained elusive. TBK1 is a pleiotropic kinase involved in the regulation of selective autophagy and inflammation. We show that heterozygous Tbk1 deletion alone does not lead to signs of motoneuron degeneration or disturbed autophagy in mice during a 200-d observation period. Surprisingly, however, hemizygous deletion of Tbk1 inversely modulates early and late disease phases in mice additionally overexpressing ALS-linked SOD1G93A, which represents a “second hit” that induces both neuroinflammation and proteostatic dysregulation. At the early stage, heterozygous Tbk1 deletion impairs autophagy in motoneurons and prepones both the clinical onset and muscular denervation in SOD1G93A/Tbk1+/− mice. At the late disease stage, however, it significantly alleviates microglial neuroinflammation, decelerates disease progression, and extends survival. Our results indicate a profound effect of TBK1 on brain inflammatory cells under pro-inflammatory conditions and point to a complex, two-edged role of TBK1 in SOD1-linked ALS.

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  • Tbk1 haploinsufficiency impairs motor neuron autophagy and accelerates clinical phenotypes as well as the accumulation of mutant SOD1 in transgenic ALS mouse models.

    “Tbk1 haploinsufficiency impairs motor neuron autophagy and accelerates clinical phenotypes as well as the accumulation of mutant SOD1 in transgenic ALS mouse models [214,215].”
  • In the setting of the SOD1G93A mutation, loss of TBK1 or pathogenic TBK1 mutations accentuate several pathologic features of ALS (disease onset, muscle denervation) while ameliorating others (inflammation, early death).

    “in the setting of the SOD1G93A mutation, loss of TBK1 or pathogenic TBK1 mutations accentuate several pathologic features of ALS (disease onset, muscle denervation) while ameliorating others (inflammation, early death) [214].”
  • Ubiquitous expression of ALS-related TBK1 mutations, heterozygous TBK1 deletion, or motor neuron-specific TBK1 deletion result in loss of function phenotypes but are insufficient to produce ALS-related neurodegeneration in mice.

    “Ubiquitous expression of ALS-related TBK1 mutations, heterozygous TBK1 deletion, or motor neuron-specific TBK1 deletion result in loss of function phenotypes but are insufficient to produce ALS-related neurodegeneration in mice [214,215].”
  • Impaired autophagy sensitizes the nervous system to key pathogenic events occurring early in ALS pathogenesis.

    “These findings not only suggest that impaired autophagy sensitizes the nervous system to key pathogenic events occurring early in ALS pathogenesis”

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Authors
Brenner, D., Sieverding, K., Bruno, C., Lüningschrör, P., Buck, E., Mungwa, S., Fischer, L., Brockmann, S. J., Ulmer, J., Bliederhäuser, C., Philibert, C. E., Satoh, T., Akira, S., Boillée, S., Mayer, B., Sendtner, M., Ludolph, A. C., Danzer, K. M., Lobsiger, C. S., Freischmidt, A., & Weishaupt, J. H.
Affiliations
  • Department of Neurology, University of Ulm, Ulm, Germany 1
  • Universität Ulm (DE)
  • Universitätsklinikum Würzburg (DE)
  • Centre National de la Recherche Scientifique (FR)
  • Research Institute for Microbial Diseases, The University of Osaka (JP)
Corresponding author
Weishaupt, Jochen H.
Venue
Journal of Experimental Medicine
Published
2019-01-11
Volume
216
Issue
2
Pages
267-278
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2909420674
Cited by
83
References
44
Citations by year
2026: 7 · 2025: 14 · 2024: 11 · 2023: 7 · 2022: 11 · 2021: 15 · 2020: 14 · 2019: 4
FWCI
7.44
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by-nc-sa)
Funders
  • The Bruno and Ilse Frick Foundation for ALS Research
  • Association pour la Recherche sur la Sclérose latérale amyotrophique et autres maladies du motoneurone
  • l’Aide à la Recherche des Maladies du Cerveau
  • University of Ulm
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
Keywords
TBK1, amyotrophic lateral sclerosis, SOD1 G93A, selective autophagy, motor neuron degeneration, neuroinflammation, microglia, proteostasis, disease progression, second hit
MeSH terms
Superoxide Dismutase-1, Loss of Function Mutation, Autophagic Cell Death, Amyotrophic Lateral Sclerosis, Animals, Brain, Disease Models, Animal, Motor Neurons, Superoxide Dismutase, Protein Serine-Threonine Kinases, Gene Deletion, Microglia, Mice, Knockout, Mice

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