Initiation and modulation of Tau protein phase separation by the drug suramin.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
09 03 2023
09 03 2023
Historique:
received:
03
08
2022
accepted:
10
02
2023
entrez:
9
3
2023
pubmed:
10
3
2023
medline:
14
3
2023
Statut:
epublish
Résumé
Tau is an intrinsically disordered neuronal protein in the central nervous system. Aggregated Tau is the main component of neurofibrillary tangles observed in Alzheimer's disease. In vitro, Tau aggregation can be triggered by polyanionic co-factors, like RNA or heparin. At different concentration ratios, the same polyanions can induce Tau condensates via liquid-liquid phase separation (LLPS), which over time develop pathological aggregation seeding potential. Data obtained by time resolved Dynamic Light Scattering experiments (trDLS), light and electron microscopy show that intermolecular electrostatic interactions between Tau and the negatively charged drug suramin induce Tau condensation and compete with the interactions driving and stabilizing the formation of Tau:heparin and Tau:RNA coacervates, thus, reducing their potential to induce cellular Tau aggregation. Tau:suramin condensates do not seed Tau aggregation in a HEK cell model for Tau aggregation, even after extended incubation. These observations indicate that electrostatically driven Tau condensation can occur without pathological aggregation when initiated by small anionic molecules. Our results provide a novel avenue for therapeutic intervention of aberrant Tau phase separation, utilizing small anionic compounds.
Identifiants
pubmed: 36894559
doi: 10.1038/s41598-023-29846-9
pii: 10.1038/s41598-023-29846-9
pmc: PMC9997437
doi:
Substances chimiques
tau Proteins
0
Suramin
6032D45BEM
Heparin
9005-49-6
RNA
63231-63-0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
3963Informations de copyright
© 2023. The Author(s).
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