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Chandupatla, R.R.* ; Flatley, A. ; Feederle, R. ; Mandelkow, E.M.* ; Kaniyappan, S.*

Novel antibody against low-n oligomers of tau protein promotes clearance of tau in cells via lysosomes.

Alzheimers Dement. 6:e12097 (2020)

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Introduction: Tau, a natively unfolded soluble protein, forms abnormal oligomers and insoluble filaments in several neurodegenerative diseases, including Alzheimer disease (AD). Tau-induced toxicity is mainly due to oligomers rather than monomers or fibrils. Methods: We have developed monoclonal antibodies against purified low-n tau oligomers of the tau repeat domain as a tool to neutralize tau aggregation and toxicity. In vitro aggregation inhibition was tested by thioflavin S, dynamic light scattering (DLS), and atomic force microscopy (AFM). Using a split-luciferase complementation assay and fluorescence-activated cell sorting (FACS), the inhibition of aggregation was analyzed in an N2a cell model of tauopathy. Results: Antibodies inhibited tau aggregation in vitro up to ~90% by blocking tau at an oligomeric state. Some antibodies were able to block tau dimerization/oligomerization in cells, as measured by a split-luciferase complementation assay. Antibodies applied extracellularly were internalized and led to sequestration of tau into lysosomes for degradation. Discussion: Novel low-n tau oligomer specific monoclonal antibody inhibits Tau oligomerization in cells and promotes toxic tau clearance.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Aggregation ; Antibody ; N2a Cells ; Screening ; Tau

ISSN (print) / ISBN 1552-5260

e-ISSN 1552-5279

Journal Alzheimer's & Dementia

Quellenangaben Volume: 6, Issue: 1, Article Number: e12097

Publisher Elsevier

Publishing Place New York, NY [u.a.]

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) CF Monoclonal Antibodies (CF-MAB)