Mutant FUS triggers age-dependent synaptic impairment in presymptomatic ALS-FUS mice (RNA-seq part2)
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB43134 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR5310970.fastq.gz | Fastqsanger.gz | |||
| ERR5310980.fastq.gz | Fastqsanger.gz | |||
| ERR5310990.fastq.gz | Fastqsanger.gz | |||
| ERR5311000.fastq.gz | Fastqsanger.gz | |||
| ERR5311010.fastq.gz | Fastqsanger.gz |
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Project description:FUS is a primarily nuclear RNA-binding protein with important roles in RNA processing and transport. FUS mutations disrupting its nuclear localization characterize a subset of amyotrophic lateral sclerosis (ALS-FUS) patients, through an unidentified pathological mechanism. FUS regulates nuclear RNA, but its role at the synapse is poorly understood. Here, we used super-resolution imaging to determine the physiological localization of extranuclear, neuronal FUS and found it predominantly near the vesicle reserve pool of presynaptic sites. Using CLIP-seq on synaptoneurosome preparations, we identified synaptic RNA targets of FUS that are associated with synapse organization and plasticity. Synaptic FUS was significantly increased in a knock-in mouse model of ALS-FUS, at presymptomatic stages. Despite apparently unaltered synaptic organization, RNA-seq of synaptoneurosomes highlighted age-dependent dysregulation of glutamatergic and GABAergic synapses. Our study indicates that FUS relocalization to the synapse in early stages of ALS-FUS results in synaptic impairment, potentially representing an initial trigger of neurodegeneration.
2021-03-05 | E-MTAB-10104 | biostudies-arrayexpress
Project description:FUS is a primarily nuclear RNA-binding protein with important roles in RNA processing and transport. FUS mutations disrupting its nuclear localization characterize a subset of amyotrophic lateral sclerosis (ALS-FUS) patients, through an unidentified pathological mechanism. FUS regulates nuclear RNA, but its role at the synapse is poorly understood. Here, we used super-resolution imaging to determine the physiological localization of extranuclear, neuronal FUS and found it predominantly near the vesicle reserve pool of presynaptic sites. Using CLIP-seq on synaptoneurosome preparations, we identified synaptic RNA targets of FUS that are associated with synapse organization and plasticity. Synaptic FUS was significantly increased in a knock-in mouse model of ALS-FUS, at presymptomatic stages. Despite apparently unaltered synaptic organization, RNA-seq of synaptoneurosomes highlighted age-dependent dysregulation of glutamatergic and GABAergic synapses. Our study indicates that FUS relocalization to the synapse in early stages of ALS-FUS results in synaptic impairment, potentially representing an initial trigger of neurodegeneration.
2021-03-05 | E-MTAB-9211 | biostudies-arrayexpress
Project description:FUS is a primarily nuclear RNA-binding protein with important roles in RNA processing and transport. FUS mutations disrupting its nuclear localization characterize a subset of amyotrophic lateral sclerosis (ALS-FUS) patients, through an unidentified pathological mechanism. FUS regulates nuclear RNA, but its role at the synapse is poorly understood. Here, we used super-resolution imaging to determine the physiological localization of extranuclear, neuronal FUS and found it predominantly near the vesicle reserve pool of presynaptic sites. Using CLIP-seq on synaptoneurosome preparations, we identified synaptic RNA targets of FUS that are associated with synapse organization and plasticity. Synaptic FUS was significantly increased in a knock-in mouse model of ALS-FUS, at presymptomatic stages. Despite apparently unaltered synaptic organization, RNA-seq of synaptoneurosomes highlighted age-dependent dysregulation of glutamatergic and GABAergic synapses. Our study indicates that FUS relocalization to the synapse in early stages of ALS-FUS results in synaptic impairment, potentially representing an initial trigger of neurodegeneration.
2021-03-05 | E-MTAB-9212 | biostudies-arrayexpress
Project description:Mutant FUS triggers age-dependent synaptic impairment in presymptomatic ALS-FUS mice (RNA-seq)
| PRJEB38950 | ENA
Project description:Mutant FUS triggers age-dependent synaptic impairment in presymptomatic ALS-FUS mice (RNA-seq)
| PRJEB38852 | ENA
Project description:Mutations disrupting the nuclear localization of the RNA-binding protein FUS characterize a subset of amyotrophic lateral sclerosis patients (ALS-FUS). FUS regulates nuclear RNAs, but its role at the synapse is poorly understood. Using super-resolution imaging we determined that the localization of FUS within synapses occurs predominantly near the vesicle reserve pool of presynaptic sites. Using CLIP-seq on synaptoneurosomes, we identified synaptic FUS RNA targets, encoding proteins associated with synapse organization and plasticity. Significant increase of synaptic FUS during early disease in a knock-in mouse model of ALS-FUS was accompanied by alterations in density and size of GABAergic synapses. mRNAs abnormally accumulated at the synapses of 6-month-old ALS-FUS mice were enriched for FUS targets and correlated with those depicting increased short-term mRNA stability via binding primarily on multiple exonic sites. Our study indicates that synaptic FUS accumulation in early disease leads to synaptic impairment, potentially representing an initial trigger of neurodegeneration.
2021-05-05 | PXD024075 | Pride
Project description:Mutations in the RNA-binding protein FUS cause aggressive, early-onset forms of amyotrophic lateral sclerosis (ALS), leading to the progressive degeneration of the neuromuscular system. These mutations drive nuclear depletion and cytoplasmic mislocalisation of FUS, resulting in both loss and gain of function. We investigated these mechanisms and their impact on key pathophysiological processes in vivo, using a novel FUS-ALS mouse model. Adult mice presented widespread transcriptomic alterations consistent with nuclear loss of function, while translatome analysis revealed specific deficits associated with aberrant FUS-dependent cytoplasmic partitioning and gain of function. Mutant FUS expression selectively impaired neuromuscular junction (NMJ) innervation in FUS-ALS females. However, NMJ reinnervation following sciatic nerve crush was equally perturbed in homozygous mutants of both sexes, indicating impaired regeneration and damage responses. Additionally, we observed cargo-specific alterations in axonal transport, a process critical for neuronal function and maintenance; in vivo mitochondrial transport was impaired in homozygous FUS-ALS mice, whereas the retrograde transport of signalling endosomes was again only affected in mutant females, strengthening the link between endosomal transport impairment and NMJ denervation in ALS. Altogether, our findings establish FUS-ALS homozygous mice as a valuable model for investigating early cellular impairments driving ALS pathology, and identify broader and sex-dependent motor neuron dysfunction in FUS-ALS pathogenesis.
2025-05-29 | GSE298457 | GEO
Project description:Mutations in the RNA-binding protein FUS cause aggressive, early-onset forms of amyotrophic lateral sclerosis (ALS), leading to the progressive degeneration of the neuromuscular system. These mutations drive nuclear depletion and cytoplasmic mislocalisation of FUS, resulting in both loss and gain of function. We investigated these mechanisms and their impact on key pathophysiological processes in vivo, using a novel FUS-ALS mouse model. Adult mice presented widespread transcriptomic alterations consistent with nuclear loss of function, while translatome analysis revealed specific deficits associated with aberrant FUS-dependent cytoplasmic partitioning and gain of function. Mutant FUS expression selectively impaired neuromuscular junction (NMJ) innervation in FUS-ALS females. However, NMJ reinnervation following sciatic nerve crush was equally perturbed in homozygous mutants of both sexes, indicating impaired regeneration and damage responses. Additionally, we observed cargo-specific alterations in axonal transport, a process critical for neuronal function and maintenance; in vivo mitochondrial transport was impaired in homozygous FUS-ALS mice, whereas the retrograde transport of signalling endosomes was again only affected in mutant females, strengthening the link between endosomal transport impairment and NMJ denervation in ALS. Altogether, our findings establish FUS-ALS homozygous mice as a valuable model for investigating early cellular impairments driving ALS pathology, and identify broader and sex-dependent motor neuron dysfunction in FUS-ALS pathogenesis.
2025-05-29 | GSE298456 | GEO
Project description:Mutant FUS triggers age-dependent synaptic impairment in presymptomatic ALS-FUS mice (RNA-seq part2)
2023-06-15 | E-MTAB-10104 | ExpressionAtlas
Project description:Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease due to gradual motorneurons (MN) degeneration. Among the processes associated to ALS pathogenesis, there is the formation of cytoplasmic inclusions produced by mutant protein aggregation, among which the RNA binding protein FUS. In this work we show that such inclusions are significantly reduced in number and dissolve faster when the RNA m6A content is diminished as a consequence of the m6A writer METTL3 knock-down. These effects were obtained observed both in neuronal cell lines and in iPSC-derived human motor neurons expressing mutant FUS. Importantly, stress granules formed in mutant conditionswhen mutant FUS is expressed/ALS condition showed a distinctive transcriptome with respect to control cells; interestingly, after METTL3 downregulation, it reverted to similar to control. Finally, we show that FUS inclusions are reduced also in patient-derived fibroblasts treated with STM-2457, a well characterized inhibitor of METTL3 activity, paving the way for its possible use for counteracting aggregate formation in ALS.
2024-05-06 | GSE256070 | GEO