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• W4360599884 abstract "Amyotrophic lateral sclerosis (ALS) is characterised by a progressive loss of upper and lower motor neurons leading to muscle weakness and eventually death. Frontotemporal dementia (FTD) presents clinically with significant behavioural decline. Approximately 10% of cases have a known family history, and disease-linked mutations in multiple genes have been identified in FTD and ALS. More recently, ALS and FTD-linked variants have been identified in the CCNF gene, which accounts for an estimated 0.6% to over 3% of familial ALS cases.In this study, we developed the first mouse models expressing either wild-type (WT) human CCNF or its mutant pathogenic variant S621G to recapitulate key clinical and neuropathological features of ALS and FTD linked to CCNF disease variants. We expressed human CCNF WT or CCNFS621G throughout the murine brain by intracranial delivery of adeno-associated virus (AAV) to achieve widespread delivery via somatic brain transgenesis.These mice developed behavioural abnormalities, similar to the clinical symptoms of FTD patients, as early as 3 months of age, including hyperactivity and disinhibition, which progressively deteriorated to include memory deficits by 8 months of age. Brains of mutant CCNF_S621G mice displayed an accumulation of ubiquitinated proteins with elevated levels of phosphorylated TDP-43 present in both CCNF_WT and mutant CCNF_S621G mice. We also investigated the effects of CCNF expression on interaction targets of CCNF and found elevated levels of insoluble splicing factor proline and glutamine-rich (SFPQ). Furthermore, cytoplasmic TDP-43 inclusions were found in both CCNF_WT and mutant CCNF_S621G mice, recapitulating the key hallmark of FTD/ALS pathology.In summary, CCNF expression in mice reproduces clinical presentations of ALS, including functional deficits and TDP-43 neuropathology with altered CCNF-mediated pathways contributing to the pathology observed." @default.
• W4360599884 created "2023-03-24" @default.
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• W4360599884 date "2023-04-01" @default.
• W4360599884 modified "2023-10-15" @default.
• W4360599884 title "TDP‐43 pathology and functional deficits in wild‐type and ALS/FTD mutant cyclin F mouse models" @default.
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• W4360599884 doi "https://doi.org/10.1111/nan.12902" @default.
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