The DOI matches its Crossref record; 61 of the 62 references it cites were found in a registry or an index.
Selective Destruction of Stable Microtubules and Axons by Inhibitors of Protein Serine/Threonine Phosphatases in Cultured Human Neurons (NT2N Cells)
Open accessAbstract
Paired helical filaments (PHFs) in the neurofibrillary tangles (NFTs) in Alzheimer’s disease (AD) brains are composed of highly phosphorylated isoforms of tau (PHFtau) that fail to bind microtubules (MTs), and the levels of MT-binding competent tau are decreased in AD brains with abundant PHFtau. Because this loss of MT binding could compromise the viability of tangle-bearing AD neurons by destabilizing MTs, we asked whether these events could be initiated by inhibiting protein phosphatase 1 (PP1) and PP2A in cultured human neurons (NT2N cells) using okadaic acid (OK) and calyculin-A (CL-A). The treatment of NT2N cells with OK and CL-A increased tau phosphorylation, decreased the binding of tau to MTs, and selectively depolymerized the more stable detyrosinated MTs but not the more labile tyrosinated MTs. Significantly, this led to the rapid degeneration of axons, which are enriched in the more stable detyrosinated MTs, and PP2A was implicated in the initiation of this cascade of events because PP2A but not PP1 was closely associated with MTs in the NT2N cells. These studies imply that inactivation of PP2A in vulnerable neurons of the AD brain may play a mechanistic role in the conversion of normal tau into PHFtau, in the depolymerization of stable MTs, and in the degeneration of axons emanating from tangle-bearing neurons.
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“However, under pathological conditions, various highly increased post-translational modifications, such as hyperphosphorylation, destabilize the interaction of tau with microtubules [33] and enhance the capacity of tau to accumulate in the cytoplasm [34], leading to microtubule instability and transport dysfunction.”
From Tau and neuroinflammation in Alzheimer’s disease: interplay mechanisms and clinical translation (2023) · cites this paper as [33]
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Metadata
- Authors
- Merrick, S. E., Trojanowski, J. Q., & Lee, V. M.-Y.
- Affiliations
- University of Pennsylvania (US)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 1997-08-01
- Volume
- 17
- Issue
- 15
- Pages
- 5726-5737
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6573204
- OpenAlex
- W1674770932
- Semantic Scholar
- ac79a6d58482597051dd8a2a3f551f09044640f7
- Cited by
- 143
- References
- 62
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 5 · 2019: 2 · 2018: 2 · 2017: 2 · 2016: 7 · 2015: 1 · 2014: 4 · 2013: 4 · 2012: 4
- FWCI
- 4.27
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health
- National Institute on Aging
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Keywords
- Alzheimer's disease, neurofibrillary tangles, paired helical filaments, tau phosphorylation, protein phosphatase 2A, protein phosphatase 1, okadaic acid, calyculin A, microtubule depolymerization, axonal degeneration
- MeSH terms
- Axons, Enzyme Inhibitors, Humans, Marine Toxins, Microtubules, Neurons, Oxazoles, Serine, Threonine, Tumor Cells, Cultured, Okadaic Acid
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