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@ARTICLE{Raas:277532,
author = {Raas, Quentin and Haouy, Gregoire and de Calbiac, Hortense
and Pasho, Elena and Marian, Anca and Guerrera, Ida Chiara
and Rosello, Marion and Oeckl, Patrick and Del Bene, Filippo
and Catanese, Alberto and Ciura, Sorana and Kabashi, Edor},
title = {{TBK}1 is involved in programmed cell death and
{ALS}-related pathways in novel zebrafish models.},
journal = {Cell death discovery},
volume = {11},
number = {1},
issn = {2058-7716},
address = {London},
publisher = {Nature Publishing Group},
reportid = {DZNE-2025-00428},
pages = {98},
year = {2025},
abstract = {Pathogenic mutations within the TBK1 gene leading to
haploinsufficiency are causative of amyotrophic lateral
sclerosis (ALS). This gene is linked to autophagy and
inflammation, two cellular mechanisms reported to be
dysregulated in ALS patients, although its functional role
in the pathogenesis could involve other players. We targeted
the TBK1 ortholog in zebrafish, an optimal vertebrate model
for investigating genetic defects in neurological disorders.
We generated zebrafish models with invalidating tbk1
mutations using CRISPR-Cas9 or tbk1 knockdown models using
antisense morpholino oligonucleotide (AMO). The early motor
phenotype of zebrafish injected with tbk1 AMO beginning at 2
days post fertilization (dpf) is associated with the
degeneration of motor neurons. In parallel, CRISPR-induced
tbk1 mutants exhibit impaired motor function beginning at 5
dpf and increased lethality beginning at 9 dpf. A
metabolomic analysis showed an association between tbk1 loss
and severe dysregulation of nicotinamide metabolism, and
incubation with nicotinamide riboside rescued the motor
behavior of tbk1 mutant zebrafish. Furthermore, a proteomic
analysis revealed increased levels of inflammatory markers
and dysregulation of programmed cell death pathways.
Necroptosis appeared to be strongly activated in TBK1 fish,
and larvae treated with the necroptosis inhibitor
necrosulfonamide exhibited improved survival. Finally, a
combined analysis of mutant zebrafish and TBK1-mutant human
motor neurons revealed dysregulation of the KEGG pathway
'ALS', with disrupted nuclear-cytoplasmic transport and
increased expression of STAT1. These findings point toward a
major role for necroptosis in the degenerative features and
premature lethality observed in tbk1 mutant zebrafish.
Overall, the novel tbk1-deficient zebrafish models offer a
great opportunity to better understand the cascade of events
leading from the loss of tbk1 expression to the onset of
motor deficits, with involvement of a metabolic defect and
increased cell death, and for the development of novel
therapeutic avenues for ALS and related neuromuscular
diseases.},
cin = {AG Öckl},
ddc = {610},
cid = {I:(DE-2719)5000073},
pnm = {353 - Clinical and Health Care Research (POF4-353)},
pid = {G:(DE-HGF)POF4-353},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40075110},
doi = {10.1038/s41420-025-02374-3},
url = {https://pub.dzne.de/record/277532},
}