Plasma Phosphorylated Tau at Threonine 181 and Neuropsychiatric Symptoms in Preclinical and Prodromal Alzheimer Disease.


Journal

Neurology
ISSN: 1526-632X
Titre abrégé: Neurology
Pays: United States
ID NLM: 0401060

Informations de publication

Date de publication:
14 02 2023
Historique:
received: 31 05 2022
accepted: 20 09 2022
pubmed: 3 11 2022
medline: 16 2 2023
entrez: 2 11 2022
Statut: ppublish

Résumé

Plasma phosphorylated tau at threonine 181 (p-tau181), a well-validated marker of Alzheimer disease (AD) pathologic change, could be a more efficient way to diagnose AD than invasive or expensive biomarkers requiring CSF or PET. In some individuals, neuropsychiatric symptoms (NPS) are the earliest manifestation of AD, observed in advance of clear cognitive decline. However, the few studies assessing AD biomarkers in association with NPS have often had imprecision in capturing behavioral symptoms that represent sequelae of neurodegenerative disease. Thus, the mild behavioral impairment (MBI) construct was developed, framing NPS in a way to improve the precision of risk estimates for disease. MBI core criteria stipulate that NPS emerge de novo in later life and persist for at least 6 months. Here, cross-sectionally and longitudinally, we investigated associations of MBI with p-tau181, neuropsychological test performance, and incident AD. Cognitively unimpaired and mild cognitive impairment (MCI) Alzheimer's Disease Neuroimaging Initiative participants were selected. MBI status was derived from the Neuropsychiatric Inventory (NPI) using a published algorithm. NPI total scores at baseline and year 1 visits were used to operationalize MBI (score >0 at both visits), NPS not meeting the MBI criteria (NPS-not-MBI, score >0 at only 1 visit), and no NPS (score = 0 at both visits). Linear regressions were fitted for cross-sectional analyses; multilevel linear mixed-effects and Cox proportional hazards models were implemented to examine the longitudinal associations of MBI with changes in p-tau181 and cognition and incident dementia. The sample included 571 participants (age 72.2 years, 46.8% female, 64.8% MCI). Cross-sectionally (β = 8.1%, 95% CI 1.4%-15.2%, These findings extend the evidence base that MBI is associated with elevated risk of cognitive decline and dementia and a sequela of emerging Alzheimer-related proteinopathies. MBI offers a substantial improvement over current approaches that explore behavior as a proxy marker for Alzheimer-related proteinopathies, with both clinical and AD trial enrichment implications.

Sections du résumé

BACKGROUND AND OBJECTIVES
Plasma phosphorylated tau at threonine 181 (p-tau181), a well-validated marker of Alzheimer disease (AD) pathologic change, could be a more efficient way to diagnose AD than invasive or expensive biomarkers requiring CSF or PET. In some individuals, neuropsychiatric symptoms (NPS) are the earliest manifestation of AD, observed in advance of clear cognitive decline. However, the few studies assessing AD biomarkers in association with NPS have often had imprecision in capturing behavioral symptoms that represent sequelae of neurodegenerative disease. Thus, the mild behavioral impairment (MBI) construct was developed, framing NPS in a way to improve the precision of risk estimates for disease. MBI core criteria stipulate that NPS emerge de novo in later life and persist for at least 6 months. Here, cross-sectionally and longitudinally, we investigated associations of MBI with p-tau181, neuropsychological test performance, and incident AD.
METHODS
Cognitively unimpaired and mild cognitive impairment (MCI) Alzheimer's Disease Neuroimaging Initiative participants were selected. MBI status was derived from the Neuropsychiatric Inventory (NPI) using a published algorithm. NPI total scores at baseline and year 1 visits were used to operationalize MBI (score >0 at both visits), NPS not meeting the MBI criteria (NPS-not-MBI, score >0 at only 1 visit), and no NPS (score = 0 at both visits). Linear regressions were fitted for cross-sectional analyses; multilevel linear mixed-effects and Cox proportional hazards models were implemented to examine the longitudinal associations of MBI with changes in p-tau181 and cognition and incident dementia.
RESULTS
The sample included 571 participants (age 72.2 years, 46.8% female, 64.8% MCI). Cross-sectionally (β = 8.1%, 95% CI 1.4%-15.2%,
DISCUSSION
These findings extend the evidence base that MBI is associated with elevated risk of cognitive decline and dementia and a sequela of emerging Alzheimer-related proteinopathies. MBI offers a substantial improvement over current approaches that explore behavior as a proxy marker for Alzheimer-related proteinopathies, with both clinical and AD trial enrichment implications.

Identifiants

pubmed: 36323521
pii: WNL.0000000000201517
doi: 10.1212/WNL.0000000000201517
pmc: PMC9969916
doi:

Substances chimiques

tau Proteins 0
Biomarkers 0
Amyloid beta-Peptides 0

Types de publication

Journal Article Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Langues

eng

Sous-ensembles de citation

IM

Pagination

e683-e693

Subventions

Organisme : NIA NIH HHS
ID : U01 AG024904
Pays : United States

Informations de copyright

© 2022 American Academy of Neurology.

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Auteurs

Maryam Ghahremani (M)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom.

Meng Wang (M)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom.

Hung-Yu Chen (HY)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom.

Henrik Zetterberg (H)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom.

Eric Smith (E)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom.

Zahinoor Ismail (Z)

From the Department of Psychiatry (M.G., H.-Y.C., Z.I.), Hotchkiss Brain Institute (M.G., M.W., H.-Y.C., E.S., Z.I.), Department of Clinical Neurosciences (M.W., E.S., Z.I.), Cumming School of Medicine, and Department of Community Health Sciences (M.W., E.S., Z.I.), University of Calgary, Alberta, Canada; Department of Psychiatry and Neurochemistry (H.Z.), Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg; Clinical Neurochemistry Laboratory (H.Z.), Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease (H.Z.), UCL Institute of Neurology, Queen Square; UK Dementia Research Institute at UCL (H.Z.); Hong Kong Center for Neurodegenerative Diseases (H.Z.), China; Mathison Centre for Mental Health Research & Education (Z.I.), University of Calgary, Alberta, Canada; and College of Medicine and Health (Z.I.), University of Exeter, United Kingdom. ismailz@ucalgary.ca.

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