Cited by 547Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchCholinesterase and Neurodegenerative Diseases

Selective inhibition of Alzheimer disease-like tau aggregation by phenothiazines.

Open access
Wischik, C M, Edwards, P C, Lai, R Y, Roth, M, Harrington, C R·1996·Proceedings of the National Academy of Sciences

Abstract

In Alzheimer disease (AD) the microtubule-associated protein tau is redistributed exponentially into paired helical filaments (PHFs) forming neurofibrillary tangles, which correlate with pyramidal cell destruction and dementia. Amorphous neuronal deposits and PHFs in AD are characterized by aggregation through the repeat domain and C-terminal truncation at Glu-391 by endogenous proteases. We show that a similar proteolytically stable complex can be generated in vitro following the self-aggregation of tau protein through a high-affinity binding site in the repeat domain. Once started, tau capture can be propagated by seeding the further accumulation of truncated tau in the presence of proteases. We have identified a nonneuroleptic phenothiazine previously used in man (methylene blue, MB), which reverses the proteolytic stability of protease-resistant PHFs by blocking the tau-tau binding interaction through the repeat domain. Although MB is inhibitory at a higher concentration than may be achieved clinically, the tau-tau binding assay was used to identify desmethyl derivatives of MB that have Ki values in the nanomolar range. Neuroleptic phenothiazines are inactive. Tau aggregation inhibitors do not affect the tau-tubulin interaction, which also occurs through the repeat domain. Our findings demonstrate that biologically selective pharmaceutical agents could be developed to facilitate the proteolytic degradation of tau aggregates and prevent the further propagation of tau capture in AD.

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Crossref · 10.1073/pnas.93.20.11213

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  • Any putative benefit of methylene blue has been thought secondary to reduced tau fibrillization and aggregation and induction of autophagy, leading to reduced tau pathology and neuron death in mouse tauopathy models.

    “Any putative benefit attributed to methylene blue has been thought to be secondary to reduced tau fibrillization and aggregation and induction of autophagy, which leads to reduced tau pathology and neuron death in mouse models of tauopathy (Congdon et al., 2012; Crowe et al., 2013; Wischik et al., 1996).”

    From Alzheimer Disease: An Update on Pathobiology and Treatment Strategies (2019) · cites this paper as Wischik et al., 1996

  • Methylene blue blocks the polymerization of tau in vitro by trapping tau monomers in an aggregation-incompetent conformation.

    “Methylene blue blocks the polymerization of tau in vitro by trapping the tau monomers in an aggregation-incompetent conformation137,138.”

    From Tau-targeting therapies for Alzheimer disease (2018) · cites this paper as [138]

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Research works printed but not linked: 8

  1. [1]Wischik, C. M., Novak, M., Thogersen, H. C., Edwards, P. C., Runswick, M. J., Jakes, R., Walker, J. E., Milstein, C., Roth, M. & Klug, A. (1988) Proc. Natl. Acad. Sci. USA 85, 4506–4510.
  2. [2]Harrington, C. R., Mukaetova-Ladinska, E. B., Hills, R., Edwards, P. C., Montejo de Garcini, E., Novak, M. & Wischik, C. M. (1991) Proc. Natl. Acad. Sci. USA 88, 5842–5846.
  3. [24]Schweers, O., Mandelkow, E.-M., Biernat, J. & Mandelkow, E. (1995) Proc. Natl. Acad. Sci. USA 92, 8463–8467.
  4. [28]Wischik, C. M., Novak, M., Edwards, P. C., Klug, A., Tichelaar, W. & Crowther, R. A. (1988) Proc. Natl. Acad. Sci. USA 85, 4884-4888.
  5. [29]Novak, M., Jakes, R., Edwards, P. C., Milstein, C. & Wischik, C. M. (1991) Proc. Natl. Acad. Sci. USA 88, 5837–5841.
  6. [31]Goedert, M., Wischik, C. M., Crowther, R. A., Walker, J. E. & Klug, A. (1988) Proc. Natl. Acad. Sci. USA 85, 4051–4055.
  7. [36]Lai, R. Y. K. (1995) Ph.D. thesis (Univ. of Cambridge, Cambridge, U.K.).
  8. [39]Goedert, M., Jakes, R., Spillantini, M.-G. & Crowther, R. A. (1994) in Microtubules, eds. Hyams, J. S. & Lloyd, C. W. (Wiley/ Liss, New York), pp. 183–200.

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Authors
Wischik, C. M., Edwards, P. C., Lai, R. Y., Roth, M., & Harrington, C. R.
Affiliations
  • MRC Laboratory of Molecular Biology (GB)
  • University of Cambridge (GB)
Venue
Proceedings of the National Academy of Sciences
Published
1996-10
Volume
93
Issue
20
Pages
11213-11218
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2167818155
Cited by
547
References
43
Citations by year
2026: 14 · 2025: 13 · 2024: 18 · 2023: 21 · 2022: 25 · 2021: 38 · 2020: 41 · 2019: 35 · 2018: 31 · 2017: 36 · 2016: 30 · 2015: 25 · 2014: 34 · 2013: 36 · 2012: 31
FWCI
0.67
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Pharmacology › Cholinesterase and Neurodegenerative Diseases
Keywords
Alzheimer's disease, tau protein, tau aggregation, phenothiazines, methylene blue, paired helical filaments, neurofibrillary tangles, repeat domain, aggregation inhibitors, antipsychotic drugs
MeSH terms
Alzheimer Disease, Humans, Methylene Blue, Peptide Fragments, Phenothiazines, Pronase, Protein Binding, tau Proteins, Macromolecular Substances

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