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A functional interaction between TDP-43 and USP10 reveals USP10 dysfunction in TDP-43 proteinopathies

Marrero-Gagliardi, A.; Noda, J.; Zanovello, M.; Gerenu, G.; Armas, J. M. B.; Bampton, A.; Torres, P.; Hernandez-Eguiazu, H.; Moragon, S.; Pellegrini, F.; Perez, C.; Fumagallo, F.; Taoro, L.; Alfaro, R. A. M. d. B.; Brown, A. L.; Quinet, G.; Andres-Benito, P.; Ferrer, I.; Acebes, A.; Freire, R.; Smits, V. A. J.; Keuss, M.; Portero-Otin, M.; Lashley, T.; Fratta, P.; Acevedo-Arozena, A.; Gil-Bea, F.

2025-09-01 neuroscience
10.1101/2024.01.23.576828 bioRxiv
Show abstract

Amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) are fatal neurodegenerative disorders characterised by the progressive degeneration of specific neurons, that are defined by the appearance of TDP-43 pathology leading to TDP-43 cytoplasmic aggregation coupled with its nuclear loss. Although the causes of TDP-43 pathology in TDP-43 proteinopathies remain unclear, stress response may play a significant role, with some TDP-43 co-localizing with stress granules (SG). The ubiquitin-specific protease 10 (USP10) is a critical inhibitor of SG assembly. Here, we identify a new functional interaction between TDP-43 and USP10, with both proteins modulating different key aspects of the biology of the other. Adding to their functional connection, we assign a new function to USP10 as a modulator of alternative splicing, sharing a subset of splicing targets with TDP-43. Critically, we found that USP10 levels can increase in postmortem tissue from ALS and FTD patients and that USP10 can ameliorate TDP-43 mediated toxicity in vivo in an animal model, overall suggesting a new role for USP10 in TDP-43 proteinopathies.

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