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  1. Article ; Online: Prevalence of orofacial pain in individuals with mild cognitive impairment or dementia: A systematic review and meta-analysis.

    Macedo, Arthur C / Bitencourt, Fernando Valentim / Faria, André Oliveira Vilela de / Bizzi, Isabella Harb / Durço, Daniella de Freitas Pereira Ângelo / Azevedo, Claudia Britto / Morris, Martin / Ferreira, Karen Dos Santos / De Souza, Leonardo Cruz / Velly, Ana Miriam

    Gerodontology

    2024  

    Abstract: Background: This systematic review investigated the prevalence of orofacial pain in patients with mild cognitive impairment (MCI) or dementia.: Materials and methods: The search was conducted in five databases (Medline (Ovid), Embase (Ovid), CINAHL, ... ...

    Abstract Background: This systematic review investigated the prevalence of orofacial pain in patients with mild cognitive impairment (MCI) or dementia.
    Materials and methods: The search was conducted in five databases (Medline (Ovid), Embase (Ovid), CINAHL, Scopus and LILACS), in three grey literature sources and in included articles' reference lists. Three independent reviewers performed study selection, quality appraisal and data extraction. The risk of bias was assessed with the National Institutes of Health tool. Prevalence was calculated using the random-effects model. Subgroup analysis and meta-regression were used to explore the heterogeneity of results.
    Results: The database and grey literature search led to 12 246 results, from which nine studies were included; a further four were selected through citation searching. The total sample comprised 6115 patients with dementia and 84 with MCI. All studies had high risk of bias. The overall estimated pooled prevalence of orofacial pain among dementia participants was 19.0% (95% CI, 11.0%-27.0%; I
    Conclusions: The pooled data from the primary studies revealed that 2 out of 10 patients with dementia have orofacial pain. Further research is needed to clarify the magnitude in individuals with MCI.
    Language English
    Publishing date 2024-01-21
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 604810-9
    ISSN 1741-2358 ; 0734-0664
    ISSN (online) 1741-2358
    ISSN 0734-0664
    DOI 10.1111/ger.12740
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Use of Tau PET to Stage Alzheimer Disease According to the Braak Staging Framework.

    Macedo, Arthur C / Tissot, Cécile / Therriault, Joseph / Servaes, Stijn / Wang, Yi-Ting / Fernandez-Arias, Jaime / Rahmouni, Nesrine / Lussier, Firoza Z / Vermeiren, Marie / Bezgin, Gleb / Vitali, Paolo / Ng, Kok Pin / Zimmer, Eduardo R / Guiot, Marie-Christine / Pascoal, Tharick A / Gauthier, Serge / Rosa-Neto, Pedro

    Journal of nuclear medicine : official publication, Society of Nuclear Medicine

    2023  Volume 64, Issue 8, Page(s) 1171–1178

    Abstract: Amyloid-β plaques and neurofibrillary tangles (NFTs) are the 2 histopathologic hallmarks of Alzheimer disease (AD). On the basis of the pattern of NFT distribution in the brain, Braak and Braak proposed a histopathologic staging system for AD. Braak ... ...

    Abstract Amyloid-β plaques and neurofibrillary tangles (NFTs) are the 2 histopathologic hallmarks of Alzheimer disease (AD). On the basis of the pattern of NFT distribution in the brain, Braak and Braak proposed a histopathologic staging system for AD. Braak staging provides a compelling framework for staging and monitoring of NFT progression in vivo using PET imaging. Because AD staging remains based on clinical features, there is an unmet need to translate neuropathologic staging to a biologic clinical staging system. Such a biomarker staging system might play a role in staging preclinical AD or in improving recruitment strategies for clinical trials. Here, we review the literature regarding AD staging with the Braak framework using tau PET imaging, here called PET-based Braak staging. Our aim is to summarize the efforts of implementing Braak staging using PET and assess correspondence with the Braak histopathologic descriptions and with AD biomarkers.
    MeSH term(s) Humans ; Alzheimer Disease/diagnostic imaging ; Alzheimer Disease/pathology ; Reproducibility of Results ; tau Proteins ; Neurofibrillary Tangles ; Amyloid beta-Peptides ; Positron-Emission Tomography ; Plaque, Amyloid
    Chemical Substances tau Proteins ; Amyloid beta-Peptides
    Language English
    Publishing date 2023-06-15
    Publishing country United States
    Document type Review ; Journal Article
    ZDB-ID 80272-4
    ISSN 1535-5667 ; 0097-9058 ; 0161-5505 ; 0022-3123
    ISSN (online) 1535-5667
    ISSN 0097-9058 ; 0161-5505 ; 0022-3123
    DOI 10.2967/jnumed.122.265200
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Predicting functional decline in aging and Alzheimer's disease with PET-based Braak staging.

    Macedo, Arthur C / Therriault, Joseph / Tissot, Cécile / Fernandez-Arias, Jaime / Ferreira, Pamela C L / Vitali, Paolo / Servaes, Stijn / Rahmouni, Nesrine / Vermeiren, Marie / Bezgin, Gleb / Lussier, Firoza Z / Stevenson, Jenna / Wang, Yi-Ting / Socualaya, Kely Quispialaya / Kunach, Peter / Nazneen, Tahnia / Hosseini, Seyyed Ali / Pallen, Vanessa / Stevenson, Alyssa /
    Ferrari-Souza, João Pedro / Bellaver, Bruna / Leffa, Douglas Teixeira / Ng, Kok Pin / Zimmer, Eduardo R / Pascoal, Tharick A / Gauthier, Serge / Rosa-Neto, Pedro

    Brain communications

    2024  Volume 6, Issue 2, Page(s) fcae043

    Abstract: The progression of PET-based Braak stages correlates with cognitive deterioration in aging and Alzheimer's disease. Here, we investigate the association between PET-based Braak stages and functional impairment and assess whether PET-based Braak staging ... ...

    Abstract The progression of PET-based Braak stages correlates with cognitive deterioration in aging and Alzheimer's disease. Here, we investigate the association between PET-based Braak stages and functional impairment and assess whether PET-based Braak staging predicts a longitudinal decline in the performance of activities of daily living. In this cohort study, we evaluated cognitively unimpaired individuals and individuals with mild cognitive impairment or Alzheimer's disease dementia. Participants underwent [
    Language English
    Publishing date 2024-02-26
    Publishing country England
    Document type Journal Article
    ISSN 2632-1297
    ISSN (online) 2632-1297
    DOI 10.1093/braincomms/fcae043
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  4. Article ; Online: Comparison of immunoassay- with mass spectrometry-derived p-tau quantification for the detection of Alzheimer's disease pathology.

    Therriault, Joseph / Woo, Marcel S / Salvadó, Gemma / Gobom, Johan / Karikari, Thomas K / Janelidze, Shorena / Servaes, Stijn / Rahmouni, Nesrine / Tissot, Cécile / Ashton, Nicholas J / Benedet, Andréa Lessa / Montoliu-Gaya, Laia / Macedo, Arthur C / Lussier, Firoza Z / Stevenson, Jenna / Vitali, Paolo / Friese, Manuel A / Massarweh, Gassan / Soucy, Jean-Paul /
    Pascoal, Tharick A / Stomrud, Erik / Palmqvist, Sebastian / Mattsson-Carlgren, Niklas / Gauthier, Serge / Zetterberg, Henrik / Hansson, Oskar / Blennow, Kaj / Rosa-Neto, Pedro

    Molecular neurodegeneration

    2024  Volume 19, Issue 1, Page(s) 2

    Abstract: Background: Antibody-based immunoassays have enabled quantification of very low concentrations of phosphorylated tau (p-tau) protein forms in cerebrospinal fluid (CSF), aiding in the diagnosis of AD. Mass spectrometry enables absolute quantification of ... ...

    Abstract Background: Antibody-based immunoassays have enabled quantification of very low concentrations of phosphorylated tau (p-tau) protein forms in cerebrospinal fluid (CSF), aiding in the diagnosis of AD. Mass spectrometry enables absolute quantification of multiple p-tau variants within a single run. The goal of this study was to compare the performance of mass spectrometry assessments of p-tau
    Methods: We measured p-tau
    Results: Mass spectrometry and immunoassays of p-tau
    Conclusions: Our results suggest that while similar overall, immunoassay-based p-tau biomarkers are slightly superior to antibody-free mass spectrometry-based p-tau biomarkers. Future work is needed to determine whether the potential to evaluate multiple biomarkers within a single run offsets the slightly lower performance of antibody-free mass spectrometry-based p-tau quantification.
    MeSH term(s) Humans ; Alzheimer Disease/diagnosis ; Amyloidogenic Proteins ; Immunoassay ; Mass Spectrometry ; Biomarkers
    Chemical Substances Amyloidogenic Proteins ; Biomarkers
    Language English
    Publishing date 2024-01-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2244557-2
    ISSN 1750-1326 ; 1750-1326
    ISSN (online) 1750-1326
    ISSN 1750-1326
    DOI 10.1186/s13024-023-00689-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Plasma and CSF concentrations of N-terminal tau fragments associate with in vivo neurofibrillary tangle burden.

    Lantero-Rodriguez, Juan / Tissot, Cécile / Snellman, Anniina / Servaes, Stijn / Benedet, Andrea L / Rahmouni, Nesrine / Montoliu-Gaya, Laia / Therriault, Joseph / Brum, Wagner S / Stevenson, Jenna / Lussier, Firoza Z / Bezgin, Gleb / Macedo, Arthur C / Chamoun, Mira / Mathotaarachi, Sulantha S / Pascoal, Tharick A / Ashton, Nicholas J / Zetterberg, Henrik / Neto, Pedro Rosa /
    Blennow, Kaj

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 19, Issue 12, Page(s) 5343–5354

    Abstract: Introduction: Fluid biomarkers capable of specifically tracking tau tangle pathology in vivo are greatly needed.: Methods: We measured cerebrospinal fluid (CSF) and plasma concentrations of N-terminal tau fragments (NTA-tau), using a novel ... ...

    Abstract Introduction: Fluid biomarkers capable of specifically tracking tau tangle pathology in vivo are greatly needed.
    Methods: We measured cerebrospinal fluid (CSF) and plasma concentrations of N-terminal tau fragments (NTA-tau), using a novel immunoassay (NTA) in the TRIAD cohort, consisting of 272 individuals assessed with amyloid beta (Aβ) positron emission tomography (PET), tau PET, magnetic resonance imaging (MRI) and cognitive assessments.
    Results: CSF and plasma NTA-tau concentrations were specifically increased in cognitively impaired Aβ-positive groups. CSF and plasma NTA-tau concentrations displayed stronger correlations with tau PET than with Aβ PET and MRI, both in global uptake and at the voxel level. Regression models demonstrated that both CSF and plasma NTA-tau are preferentially associated with tau pathology. Moreover, plasma NTA-tau was associated with longitudinal tau PET accumulation across the aging and Alzheimer's disease (AD) spectrum.
    Discussion: NTA-tau is a biomarker closely associated with in vivo tau deposition in the AD continuum and has potential as a tau tangle biomarker in clinical settings and trials.
    Highlights: An assay for detecting N-terminal tau fragments (NTA-tau) in plasma and CSF was evaluated. NTA-tau is more closely associated with tau PET than amyloid PET or neurodegeneration. NTA-tau can successfully track in vivo tau deposition across the AD continuum. Plasma NTA-tau increased over time only in cognitively impaired amyloid-β positive individuals.
    MeSH term(s) Humans ; Neurofibrillary Tangles/pathology ; Amyloid beta-Peptides/cerebrospinal fluid ; tau Proteins/cerebrospinal fluid ; Alzheimer Disease/diagnosis ; Positron-Emission Tomography/methods ; Biomarkers/cerebrospinal fluid ; Cognitive Dysfunction/diagnosis
    Chemical Substances Amyloid beta-Peptides ; tau Proteins ; Biomarkers
    Language English
    Publishing date 2023-05-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13119
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: 14-3-3 [Formula: see text]-reported early synaptic injury in Alzheimer's disease is independently mediated by sTREM2.

    Woo, Marcel S / Nilsson, Johanna / Therriault, Joseph / Rahmouni, Nesrine / Brinkmalm, Ann / Benedet, Andrea L / Ashton, Nicholas J / Macedo, Arthur C / Servaes, Stijn / Wang, Yi-Ting / Tissot, Cécile / Arias, Jaime Fernandez / Hosseini, Seyyed Ali / Chamoun, Mira / Lussier, Firoza Z / Karikari, Thomas K / Stevenson, Jenna / Mayer, Christina / Ferrari-Souza, João Pedro /
    Kobayashi, Eliane / Massarweh, Gassan / Friese, Manuel A / Pascoal, Tharick A / Gauthier, Serge / Zetterberg, Henrik / Blennow, Kaj / Rosa-Neto, Pedro

    Journal of neuroinflammation

    2023  Volume 20, Issue 1, Page(s) 278

    Abstract: Introduction: Synaptic loss is closely associated with tau aggregation and microglia activation in later stages of Alzheimer's disease (AD). However, synaptic damage happens early in AD at the very early stages of tau accumulation. It remains unclear ... ...

    Abstract Introduction: Synaptic loss is closely associated with tau aggregation and microglia activation in later stages of Alzheimer's disease (AD). However, synaptic damage happens early in AD at the very early stages of tau accumulation. It remains unclear whether microglia activation independently causes synaptic cleavage before tau aggregation appears.
    Methods: We investigated 104 participants across the AD continuum by measuring 14-3-3 zeta/delta ([Formula: see text]) as a cerebrospinal fluid biomarker for synaptic degradation, and fluid and imaging biomarkers of tau, amyloidosis, astrogliosis, neurodegeneration, and inflammation. We performed correlation analyses in cognitively unimpaired and impaired participants and used structural equation models to estimate the impact of microglia activation on synaptic injury in different disease stages.
    Results: 14-3-3 [Formula: see text] was increased in participants with amyloid pathology at the early stages of tau aggregation before hippocampal volume loss was detectable. 14-3-3 [Formula: see text] correlated with amyloidosis and tau load in all participants but only with biomarkers of neurodegeneration and memory deficits in cognitively unimpaired participants. This early synaptic damage was independently mediated by sTREM2. At later disease stages, tau and astrogliosis additionally mediated synaptic loss.
    Conclusions: Our results advertise that sTREM2 is mediating synaptic injury at the early stages of tau accumulation, underlining the importance of microglia activation for AD disease propagation.
    MeSH term(s) Humans ; Alzheimer Disease/pathology ; Amyloid beta-Peptides/cerebrospinal fluid ; Amyloidosis ; Biomarkers/cerebrospinal fluid ; Gliosis ; tau Proteins/metabolism ; 14-3-3 Proteins
    Chemical Substances Amyloid beta-Peptides ; Biomarkers ; tau Proteins ; 14-3-3 Proteins ; TREM2 protein, human
    Language English
    Publishing date 2023-11-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2156455-3
    ISSN 1742-2094 ; 1742-2094
    ISSN (online) 1742-2094
    ISSN 1742-2094
    DOI 10.1186/s12974-023-02962-z
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  7. Article ; Online: Equivalence of plasma p-tau217 with cerebrospinal fluid in the diagnosis of Alzheimer's disease.

    Therriault, Joseph / Servaes, Stijn / Tissot, Cécile / Rahmouni, Nesrine / Ashton, Nicholas J / Benedet, Andréa Lessa / Karikari, Thomas K / Macedo, Arthur C / Lussier, Firoza Z / Stevenson, Jenna / Wang, Yi-Ting / Fernandez-Arias, Jaime / Stevenson, Alyssa / Socualaya, Kely Quispialaya / Haeger, Arlette / Nazneen, Tahnia / Aumont, Étienne / Hosseini, Ali / Rej, Soham /
    Vitali, Paolo / Triana-Baltzer, Gallen / Kolb, Hartmuth C / Soucy, Jean-Paul / Pascoal, Tharick A / Gauthier, Serge / Zetterberg, Henrik / Blennow, Kaj / Rosa-Neto, Pedro

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 19, Issue 11, Page(s) 4967–4977

    Abstract: Introduction: Plasma biomarkers are promising tools for Alzheimer's disease (AD) diagnosis, but comparisons with more established biomarkers are needed.: Methods: We assessed the diagnostic performance of p-tau: Results: Plasma p-tau biomarkers ... ...

    Abstract Introduction: Plasma biomarkers are promising tools for Alzheimer's disease (AD) diagnosis, but comparisons with more established biomarkers are needed.
    Methods: We assessed the diagnostic performance of p-tau
    Results: Plasma p-tau biomarkers had lower dynamic ranges and effect sizes compared to CSF p-tau. Plasma p-tau
    Discussion: Plasma and CSF p-tau
    Highlights: p-tau
    MeSH term(s) Humans ; Alzheimer Disease/diagnosis ; Spinal Puncture ; Amyloidogenic Proteins ; Plasma ; Biomarkers ; tau Proteins ; Amyloid beta-Peptides
    Chemical Substances Amyloidogenic Proteins ; Biomarkers ; tau Proteins ; Amyloid beta-Peptides
    Language English
    Publishing date 2023-04-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Plasma pTau-217 and N-terminal tau (NTA) enhance sensitivity to identify tau PET positivity in amyloid-β positive individuals.

    Woo, Marcel S / Tissot, Cécile / Lantero-Rodriguez, Juan / Snellman, Anniina / Therriault, Joseph / Rahmouni, Nesrine / Macedo, Arthur C / Servaes, Stijn / Wang, Yi-Ting / Arias, Jaime Fernandez / Hosseini, Seyyed Ali / Chamoun, Mira / Lussier, Firoza Z / Benedet, Andrea L / Ashton, Nicholas J / Karikari, Thomas K / Triana-Baltzer, Gallen / Kolb, Hartmuth C / Stevenson, Jenna /
    Mayer, Christina / Kobayashi, Eliane / Massarweh, Gassan / Friese, Manuel A / Pascoal, Tharick A / Gauthier, Serge / Zetterberg, Henrik / Blennow, Kaj / Rosa-Neto, Pedro

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 20, Issue 2, Page(s) 1166–1174

    Abstract: Introduction: We set out to identify tau PET-positive (A+T+) individuals among amyloid-beta (Aβ) positive participants using plasma biomarkers.: Methods: In this cross-sectional study we assessed 234 participants across the AD continuum who were ... ...

    Abstract Introduction: We set out to identify tau PET-positive (A+T+) individuals among amyloid-beta (Aβ) positive participants using plasma biomarkers.
    Methods: In this cross-sectional study we assessed 234 participants across the AD continuum who were evaluated by amyloid PET with [
    Results: Highest associations with tau positivity in Aβ+ individuals were found for plasma pTau-217 (AUC [CI
    Discussion: The potential for identifying tau accumulation in later Braak stages will be useful for patient stratification and prognostication in treatment trials and in clinical practice.
    Highlights: We found that in a cohort without pre-selection pTau-181, pTau-217, and NTA-tau showed the highest association with tau PET positivity. We found that in Aβ+ individuals pTau-217 and NTA-tau showed the highest association with tau PET positivity. Combining pTau-217 and NTA-tau resulted in the strongest agreement with the tau PET-based classification.
    MeSH term(s) Humans ; Alzheimer Disease ; tau Proteins ; Cross-Sectional Studies ; Amyloid beta-Peptides ; Biomarkers ; Positron-Emission Tomography
    Chemical Substances tau Proteins ; Amyloid beta-Peptides ; Biomarkers
    Language English
    Publishing date 2023-11-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13528
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  9. Article ; Online: Plasma p-tau231 and p-tau217 inform on tau tangles aggregation in cognitively impaired individuals.

    Ferreira, Pamela C L / Therriault, Joseph / Tissot, Cécile / Ferrari-Souza, João Pedro / Benedet, Andréa L / Povala, Guilherme / Bellaver, Bruna / Leffa, Douglas T / Brum, Wagner S / Lussier, Firoza Z / Bezgin, Gleb / Servaes, Stijn / Vermeiren, Marie / Macedo, Arthur C / Cabrera, Arlec / Stevenson, Jenna / Triana-Baltzer, Gallen / Kolb, Hartmuth / Rahmouni, Nesrine /
    Klunk, William E / Lopez, Oscar L / Villemagne, Victor L / Cohen, Ann / Tudorascu, Dana L / Zimmer, Eduardo R / Karikari, Thomas K / Ashton, Nicholas J / Zetterberg, Henrik / Blennow, Kaj / Gauthier, Serge / Rosa-Neto, Pedro / Pascoal, Tharick A

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 19, Issue 10, Page(s) 4463–4474

    Abstract: Introduction: Phosphorylated tau (p-tau) biomarkers have been recently proposed to represent brain amyloid-β (Aβ) pathology. Here, we evaluated the plasma biomarkers' contribution beyond the information provided by demographics (age and sex) to identify ...

    Abstract Introduction: Phosphorylated tau (p-tau) biomarkers have been recently proposed to represent brain amyloid-β (Aβ) pathology. Here, we evaluated the plasma biomarkers' contribution beyond the information provided by demographics (age and sex) to identify Aβ and tau pathologies in individuals segregated as cognitively unimpaired (CU) and impaired (CI).
    Methods: We assessed 138 CU and 87 CI with available plasma p-tau231, 217
    Results: In CU, only plasma p-tau231 and p-tau217
    Discussion: Our results support plasma p-tau231 and p-tau217
    Highlights: It is still unclear how much plasma biomarkers contribute to identification of AD pathology across the AD spectrum beyond the information already provided by demographics (age + sex). Plasma p-tau231 and p-tau217
    MeSH term(s) Humans ; Amyloid beta-Peptides ; Plasma ; Biomarkers ; Alzheimer Disease ; tau Proteins ; Positron-Emission Tomography
    Chemical Substances Amyloid beta-Peptides ; Biomarkers ; tau Proteins
    Language English
    Publishing date 2023-08-03
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13393
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  10. Article ; Online: Blood-brain barrier integrity impacts the use of plasma amyloid-β as a proxy of brain amyloid-β pathology.

    Bellaver, Bruna / Puig-Pijoan, Albert / Ferrari-Souza, João Pedro / Leffa, Douglas T / Lussier, Firoza Z / Ferreira, Pamela C L / Tissot, Cécile / Povala, Guilherme / Therriault, Joseph / Benedet, Andréa L / Ashton, Nicholas J / Servaes, Stijn / Chamoun, Mira / Stevenson, Jenna / Rahmouni, Nesrine / Vermeiren, Marie / Macedo, Arthur C / Fernández-Lebrero, Aida / García-Escobar, Greta /
    Navalpotro-Gómez, Irene / Lopez, Oscar / Tudorascu, Dana L / Cohen, Ann / Villemagne, Victor L / Klunk, William E / Gauthier, Serge / Zimmer, Eduardo R / Karikari, Thomas K / Blennow, Kaj / Zetterberg, Henrik / Suárez-Calvet, Marc / Rosa-Neto, Pedro / Pascoal, Tharick A

    Alzheimer's & dementia : the journal of the Alzheimer's Association

    2023  Volume 19, Issue 9, Page(s) 3815–3825

    Abstract: Introduction: Amyloid-β (Aβ) and tau can be quantified in blood. However, biological factors can influence the levels of brain-derived proteins in the blood. The blood-brain barrier (BBB) regulates protein transport between cerebrospinal fluid (CSF) and ...

    Abstract Introduction: Amyloid-β (Aβ) and tau can be quantified in blood. However, biological factors can influence the levels of brain-derived proteins in the blood. The blood-brain barrier (BBB) regulates protein transport between cerebrospinal fluid (CSF) and blood. BBB altered permeability might affect the relationship between brain and blood biomarkers.
    Methods: We assessed 224 participants in research (TRIAD, n = 96) and clinical (BIODEGMAR, n = 128) cohorts with plasma and CSF/positron emission tomography Aβ, p-tau, and albumin measures.
    Results: Plasma Aβ
    Discussion: These findings suggest that BBB integrity may influence the performance of plasma Aβ, but not p-tau, biomarkers in research and clinical settings.
    Highlights: BBB permeability affects the association between brain and plasma Aβ levels. BBB integrity does not affect the association between brain and plasma p-tau levels. Plasma Aβ was most affected by BBB permeability in AD-related brain regions. BBB permeability increases with age but not according to cognitive status.
    MeSH term(s) Humans ; Alzheimer Disease/metabolism ; Blood-Brain Barrier/metabolism ; tau Proteins/cerebrospinal fluid ; Amyloid beta-Peptides/metabolism ; Brain/pathology ; Positron-Emission Tomography ; Biomarkers/cerebrospinal fluid ; Peptide Fragments/cerebrospinal fluid
    Chemical Substances tau Proteins ; Amyloid beta-Peptides ; Biomarkers ; Peptide Fragments
    Language English
    Publishing date 2023-03-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural
    ZDB-ID 2211627-8
    ISSN 1552-5279 ; 1552-5260
    ISSN (online) 1552-5279
    ISSN 1552-5260
    DOI 10.1002/alz.13014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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