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Tau PET positivity in individuals with and without cognitive impairment varies with age, amyloid-β status, APOE genotype and sex.

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Title: Tau PET positivity in individuals with and without cognitive impairment varies with age, amyloid-β status, APOE genotype and sex.
Authors: Ossenkoppele, Rik (AUTHOR), Coomans, Emma M. (AUTHOR), Apostolova, Liana G. (AUTHOR), Baker, Suzanne L. (AUTHOR), Barthel, Henryk (AUTHOR), Beach, Thomas G. (AUTHOR), Benzinger, Tammy L. S. (AUTHOR), Betthauser, Tobey (AUTHOR), Bischof, Gérard N. (AUTHOR), Bottlaender, Michel (AUTHOR), Bourgeat, Pierick (AUTHOR), den Braber, Anouk (AUTHOR), Brendel, Matthias (AUTHOR), Brickman, Adam M. (AUTHOR), Cash, David M. (AUTHOR), Carrillo, Maria C. (AUTHOR), Coath, William (AUTHOR), Christian, Bradley T. (AUTHOR), Dickerson, Brad C. (AUTHOR), Dore, Vincent (AUTHOR)
Source: Nature Neuroscience. Aug2025, Vol. 28 Issue 8, p1610-1621. 12p.
Abstract: Tau positron emission tomography (PET) imaging allows in vivo detection of tau proteinopathy in Alzheimer's disease, which is associated with neurodegeneration and cognitive decline. Understanding how demographic, clinical and genetic factors relate to tau PET positivity will facilitate its use for clinical practice and research. Here we conducted an analysis of 42 cohorts worldwide (N = 12,048), including 7,394 cognitively unimpaired (CU) participants, 2,177 participants with mild cognitive impairment (MCI) and 2,477 participants with dementia. We found that from age 60 years to 80 years, tau PET positivity in a temporal composite region increased from 1.1% to 4.4% among CU amyloid-β (Aβ)-negative participants and from 17.4% to 22.2% among CU Aβ-positive participants. Across the same age span, tau PET positivity decreased from 68.0% to 52.9% in participants with MCI and from 91.5% to 74.6% in participants with dementia. Age, Aβ status, APOE ε4 carriership and female sex were all associated with a higher prevalence of tau PET positivity across groups. APOE ε4 carriership in CU individuals lowered the age at onset of both Aβ positivity and tau positivity by decades. Finally, we replicated these associations in an independent autopsy dataset (N = 5,072 from 3 cohorts). Ossenkoppele, Coomans and colleagues analyzed the tau PET data of 12,048 individuals from 42 cohorts worldwide. They found that age, amyloid-β status, presence of an APOE ε4 allele and female sex are key contributors to tau PET positivity, which should aid clinical decision-making and trial designs. [ABSTRACT FROM AUTHOR]
Copyright of Nature Neuroscience is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Tau PET positivity in individuals with and without cognitive impairment varies with age, amyloid-β status, APOE genotype and sex.
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  Data: Tau positron emission tomography (PET) imaging allows in vivo detection of tau proteinopathy in Alzheimer's disease, which is associated with neurodegeneration and cognitive decline. Understanding how demographic, clinical and genetic factors relate to tau PET positivity will facilitate its use for clinical practice and research. Here we conducted an analysis of 42 cohorts worldwide (N = 12,048), including 7,394 cognitively unimpaired (CU) participants, 2,177 participants with mild cognitive impairment (MCI) and 2,477 participants with dementia. We found that from age 60 years to 80 years, tau PET positivity in a temporal composite region increased from 1.1% to 4.4% among CU amyloid-β (Aβ)-negative participants and from 17.4% to 22.2% among CU Aβ-positive participants. Across the same age span, tau PET positivity decreased from 68.0% to 52.9% in participants with MCI and from 91.5% to 74.6% in participants with dementia. Age, Aβ status, APOE ε4 carriership and female sex were all associated with a higher prevalence of tau PET positivity across groups. APOE ε4 carriership in CU individuals lowered the age at onset of both Aβ positivity and tau positivity by decades. Finally, we replicated these associations in an independent autopsy dataset (N = 5,072 from 3 cohorts). Ossenkoppele, Coomans and colleagues analyzed the tau PET data of 12,048 individuals from 42 cohorts worldwide. They found that age, amyloid-β status, presence of an APOE ε4 allele and female sex are key contributors to tau PET positivity, which should aid clinical decision-making and trial designs. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Nature Neuroscience is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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