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• W3174546572 abstract "Amyotrophic lateral sclerosis (ALS) is defined by the destruction of upper- and lower motor neurons. Post-mortem, nearly all ALS cases are positive for cytoplasmic aggregates containing the DNA/RNA binding protein TDP-43. Recent studies indicate that this pathogenic mislocalization of TDP-43 may participate in generating hyperexcitability of the upper motor neurons, the earliest detectable change in ALS patients, yet the mechanisms driving this remain unclear. We investigated how mislocalisation of TDP-43 could initiate network dysfunction in ALS. We employed a tetracycline inducible system to express either human wildtype TDP-43 (TDP-43WT) or human TDP-43 that cannot enter the nucleus (TDP-43ΔNLS) in excitatory neurons (Camk2α promoter), crossed Thy1-YFPH mice to visualize dendritic spines, the major site of excitatory synapses. In comparison to both TDP-43WT and controls, TDP-43ΔNLS drove a robust loss in spine density in all the dendrite regions of the upper motor neurons, most affecting thin spines. This indicates that TDP-43 is involved in the generation of network dysfunction in ALS likely through impacting the formation or durability of excitatory synapses. These findings are relevant to the vast majority of ALS cases, and provides further evidence that upper motor neurons may need to be protected from TDP-43 mediated synaptic excitatory changes early in disease." @default.
• W3174546572 created "2021-07-05" @default.
• W3174546572 creator A5000428113 @default.
• W3174546572 creator A5061379223 @default.
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• W3174546572 date "2021-06-30" @default.
• W3174546572 modified "2023-10-05" @default.
• W3174546572 title "Cytoplasmic Human TDP-43 Mislocalization Induces Widespread Dendritic Spine Loss in Mouse Upper Motor Neurons" @default.
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• W3174546572 doi "https://doi.org/10.3390/brainsci11070883" @default.
• W3174546572 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8301870" @default.
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• W3174546572 hasPublicationYear "2021" @default.
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