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@ARTICLE{Hu:270416,
author = {Hu, Yiying and Hruscha, Alexander and Pan, Chenchen and
Schifferer, Martina and Schmidt, Michael K and Nuscher,
Brigitte and Giera, Martin and Kostidis, Sarantos and
Burhan, Özge and van Bebber, Frauke and Edbauer, Dieter and
Arzberger, Thomas and Haass, Christian and Schmid, Bettina},
title = {{M}is-localization of endogenous {TDP}-43 leads to
{ALS}-like early-stage metabolic dysfunction and progressive
motor deficits.},
journal = {Molecular neurodegeneration},
volume = {19},
number = {1},
issn = {1750-1326},
address = {London},
publisher = {Biomed Central},
reportid = {DZNE-2024-00796},
pages = {50},
year = {2024},
abstract = {The key pathological signature of ALS/ FTLD is the
mis-localization of endogenous TDP-43 from the nucleus to
the cytoplasm. However, TDP-43 gain of function in the
cytoplasm is still poorly understood since TDP-43 animal
models recapitulating mis-localization of endogenous TDP-43
from the nucleus to the cytoplasm are missing.CRISPR/Cas9
technology was used to generate a zebrafish line (called
CytoTDP), that mis-locates endogenous TDP-43 from the
nucleus to the cytoplasm. Phenotypic characterization of
motor neurons and the neuromuscular junction was performed
by immunostaining, microglia were immunohistochemically
localized by whole-mount tissue clearing and muscle
ultrastructure was analyzed by scanning electron microscopy.
Behavior was investigated by video tracking and quantitative
analysis of swimming parameters. RNA sequencing was used to
identify mis-regulated pathways with validation by molecular
analysis.CytoTDP fish have early larval phenotypes
resembling clinical features of ALS such as progressive
motor defects, neurodegeneration and muscle atrophy. Taking
advantage of zebrafish's embryonic development that solely
relys on yolk usage until 5 days post fertilization, we
demonstrated that microglia proliferation and activation in
the hypothalamus is independent from food intake. By
comparing CytoTDP to a previously generated TDP-43 knockout
line, transcriptomic analyses revealed that mis-localization
of endogenous TDP-43, rather than TDP-43 nuclear loss of
function, leads to early onset metabolic dysfunction.The new
TDP-43 model mimics the ALS/FTLD hallmark of progressive
motor dysfunction. Our results suggest that functional
deficits of the hypothalamus, the metabolic regulatory
center, might be the primary cause of weight loss in ALS
patients. Cytoplasmic gain of function of endogenous TDP-43
leads to metabolic dysfunction in vivo that are reminiscent
of early ALS clinical non-motor metabolic alterations. Thus,
the CytoTDP zebrafish model offers a unique opportunity to
identify mis-regulated targets for therapeutic intervention
early in disease progression.},
keywords = {Animals / Zebrafish / Amyotrophic Lateral Sclerosis:
metabolism / Amyotrophic Lateral Sclerosis: pathology /
Amyotrophic Lateral Sclerosis: genetics / DNA-Binding
Proteins: metabolism / DNA-Binding Proteins: genetics /
Disease Models, Animal / Motor Neurons: metabolism / Motor
Neurons: pathology / Zebrafish Proteins: metabolism /
Zebrafish Proteins: genetics / Animals, Genetically Modified
/ Neuromuscular Junction: metabolism / Neuromuscular
Junction: pathology / ALS (Other) / Animal model (Other) /
Hypothalamus (Other) / Metabolic dysfunction (Other) /
Neurodegeneration (Other) / TDP-43 (Other) / Zebrafish
(Other) / DNA-Binding Proteins (NLM Chemicals) / Zebrafish
Proteins (NLM Chemicals) / Tardbp protein, zebrafish (NLM
Chemicals)},
cin = {AG Schmid / AG Misgeld / AG Edbauer / AG Haass},
ddc = {570},
cid = {I:(DE-2719)1140002 / I:(DE-2719)1110000-4 /
I:(DE-2719)1110004 / I:(DE-2719)1110007},
pnm = {352 - Disease Mechanisms (POF4-352) / 351 - Brain Function
(POF4-351)},
pid = {G:(DE-HGF)POF4-352 / G:(DE-HGF)POF4-351},
typ = {PUB:(DE-HGF)16},
pmc = {pmc:PMC11188230},
pubmed = {pmid:38902734},
doi = {10.1186/s13024-024-00735-7},
url = {https://pub.dzne.de/record/270416},
}