Neurodegenerative Disease-Associated TDP-43 Fragments Are Extracellularly Secreted with CASA Complex Proteins

Autor: Elena Casarotto, Daisy Sproviero, Eleonora Corridori, Maria Cristina Gagliani, Marta Cozzi, Marta Chierichetti, Riccardo Cristofani, Veronica Ferrari, Mariarita Galbiati, Francesco Mina, Margherita Piccolella, Paola Rusmini, Barbara Tedesco, Stella Gagliardi, Katia Cortese, Cristina Cereda, Angelo Poletti, Valeria Crippa
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Cells, Vol 11, Iss 3, p 516 (2022)
Druh dokumentu: article
ISSN: 2073-4409
DOI: 10.3390/cells11030516
Popis: Extracellular vesicles (EVs) play a central role in neurodegenerative diseases (NDs) since they may either spread the pathology or contribute to the intracellular protein quality control (PQC) system for the cellular clearance of NDs-associated proteins. Here, we investigated the crosstalk between large (LVs) and small (SVs) EVs and PQC in the disposal of TDP-43 and its FTLD and ALS-associated C-terminal fragments (TDP-35 and TDP-25). By taking advantage of neuronal cells (NSC-34 cells), we demonstrated that both EVs types, but particularly LVs, contained TDP-43, TDP-35 and TDP-25. When the PQC system was inhibited, as it occurs in NDs, we found that TDP-35 and TDP-25 secretion via EVs increased. In line with this observation, we specifically detected TDP-35 in EVs derived from plasma of FTLD patients. Moreover, we demonstrated that both neuronal and plasma-derived EVs transported components of the chaperone-assisted selective autophagy (CASA) complex (HSP70, BAG3 and HSPB8). Neuronal EVs also contained the autophagy-related MAP1LC3B-II protein. Notably, we found that, under PQC inhibition, HSPB8, BAG3 and MAP1LC3B-II secretion paralleled that of TDP-43 species. Taken together, our data highlight the role of EVs, particularly of LVs, in the disposal of disease-associated TDP-43 species, and suggest a possible new role for the CASA complex in NDs.
Databáze: Directory of Open Access Journals
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