Tau protein abnormalities associated with the progression of alzheimer disease type dementia
Abstract
The degree to which neurofibrillary tangles (NFT), the hallmark lesions of Alzheimer disease (AD), contribute to the development of the cognitive symptoms of AD has been debated. NFTs are comprised of abnormally phosphorylated and conformationally altered tau proteins. Conformational changes in tau have been proposed to be among the earliest neurobiological changes in AD. This study examined whether conformational changes detected by antibodies MC1 and TG3 represent early abnormalities in the disease process by assessing their presence at different stages of dementia in multiple brain regions. Postmortem specimens from several neocortical regions were examined for conformational changes in tau by ELISA in subjects [n=81] who died at different stages of cognitive impairment. Concentrations of conformationally altered tau increased with increasing dementia severity and the levels of MC1 immunoreactivity increased in the frontal cortex of mildly demented subjects before the appearance of NFT bearing neurons, suggesting that conformational alterations in tau occur early in the course of AD and its cognitive symptoms and may precede histologically identified NFTs.
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Neuropathological studies measuring oligomeric tau (MC1+) in AD patients show that neuronal loss and cognitive deficits correlate with increased MC1 reactivity and that these changes precede NFT formation.
“This is supported by neuropathological studies measuring oligomeric tau (MC1+) in AD patients which show that neuronal loss and cognitive deficits correlate with increased MC1 reactivity and that these changes precede NFT formation32.”
From Tau Internalization is Regulated by 6-O Sulfation on Heparan Sulfate Proteoglycans (HSPGs) (2018) · cites this paper as [32]
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- Authors
- Haroutunian, V., Davies, P., Vianna, C., Buxbaum, J. D., & Purohit, D. P.
- Affiliations
- James J. Peters VA Medical Center (US)
- Albert Einstein College of Medicine (US)
- Icahn School of Medicine at Mount Sinai (US)
- Corresponding author
- Haroutunian, V.
- Venue
- Neurobiology of Aging
- Publisher
- Elsevier BV
- Published
- 2007-01
- Volume
- 28
- Issue
- 1
- Pages
- 1-7
- ISSN
- 0197-4580 (ISSN-L)
- OpenAlex
- W2102795669
- Cited by
- 86
- References
- 57
- Citations by year
- 2026: 4 · 2025: 2 · 2024: 1 · 2023: 4 · 2022: 2 · 2021: 5 · 2020: 5 · 2019: 3 · 2018: 3 · 2017: 7 · 2016: 4 · 2015: 4 · 2014: 7 · 2013: 5 · 2012: 2
- FWCI
- 1.77
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neurobiology of Aging (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute on Aging (P50AG005138, P01AG002219)
- National Center for Research Resources (M01RR000071)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Keywords
- tau protein, Alzheimer's disease, neurofibrillary tangles, dementia severity, frontal cortex, cognitive impairment, phosphorylated tau
- MeSH terms
- Aged, Aged, 80 and over, Aging, Alzheimer Disease, Brain, Brain Chemistry, Female, Humans, Male, Middle Aged, tau Proteins, Disease Progression, In Vitro Techniques
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