Evidence map›Paper›PMID 34218796›Full record

ArticleJournal of neuroinflammation2021

Cognitive and brain cytokine profile of non-demented individuals with cerebral amyloid-beta deposition.

Lisi Flores-Aguilar, M Florencia Iulita, Chiara Orciani, Neil Tanna, Jingyun Yang, David A Bennett, A Claudio Cuello

Open access · goldAbstract read
In one paragraph

Article in Journal of neuroinflammation, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
3.1field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed, 19 citations in OpenAlex.

  1. Article
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  7. Alteration of Blood Immune Biomarkers in MCI Patients with DifferentInternational journal of molecular sciences · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 4 countries.

Lisi Flores-AguilarDepartment of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada.
M Florencia IulitaSant Pau Memory Unit, Department of Neurology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain.
Chiara OrcianiDepartment of Neurology and Neurosurgery, McGill University, Montreal, Canada.
Neil TannaDepartment of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada.
Jingyun YangRush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA.
David A BennettRush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA.
A Claudio CuelloDepartment of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada. claudio.cuello@mcgill.ca.ORCID http://orcid.org/0000-0003-2143-2745
McGill University · CARush University Medical Center · USUniversitat Autònoma de Barcelona · ESUniversity of Oxford · GB

Funding

SUPPLEMENT TO RUSH ALZHEIMERS DISEASE CENTER COREP30AG010161 · NIA · RUSH UNIVERSITY MEDICAL CENTER · PI BENNETT, DAVID ALAN · 1991 to 2020
$49.1M
RISK FACTORS, PATHOLOGY, AND CLINICAL EXPRESSIONS OF ADR01AG015819 · NIA · RUSH UNIVERSITY MEDICAL CENTER · PI BENNETT, DAVID ALAN · 1998 to 2024
$21.4M
CIHR 201603PJT 364544NIA NIH HHS P30 AG010161NIA NIH HHS P30AG10161NIA NIH HHS R01 AG015819NIA NIH HHS R01AG15819
6 · The paper itself

Abstract

backgroundBrain inflammation has been increasingly associated with early amyloid accumulation in Alzheimer's disease models; however, evidence of its occurrence in humans remains scarce. To elucidate whether amyloid deposition is associated with neuroinflammation and cognitive deficits, we studied brain inflammatory cytokine expression and cognitive decline in non-demented elderly individuals with and without cerebral amyloid-beta deposition.

methodsGlobal cognition, episodic, working, and semantic memory, perceptual speed, visuospatial ability, and longitudinal decline (5.7 ± 3.6 years) in each cognitive domain were compared between elderly individuals (66-79 years) with and without cerebral amyloid-beta deposition. The expression of 20 inflammatory cytokines was analyzed in frozen temporal, parietal, and frontal cortices and compared between older individuals with and without amyloid-beta deposition in each brain region. Correlation analyses were performed to analyze associations between amyloid-beta load, cytokine expression, and cognitive decline.

resultsIndividuals with cortical amyloid-beta deposition displayed deficits and a faster rate of cognitive decline in perceptual speed as compared with those individuals without amyloid-beta. This decline was positively associated with cortical amyloid-beta levels. Elderly individuals with amyloid-beta deposition had higher levels of IL-1β, IL-6, and eotaxin-3 in the temporal cortex accompanied by an increase in MCP-1 and IL-1β in the parietal cortex and a trend towards higher levels of IL-1β and MCP-1 in the frontal cortex as compared with age-matched amyloid-free individuals. Brain IL-1β levels displayed a positive association with cortical amyloid burden in each brain region. Finally, differential cytokine expression in each cortical region was associated with cognitive decline.

conclusionsElderly individuals with amyloid-beta neuropathology but no symptomatic manifestation of dementia, exhibit cognitive decline and increased brain cytokine expression. Such observations suggest that increased cytokine expression might be an early event in the Alzheimer's continuum.

Indexed as

AgedAmyloid beta-PeptidesBrainCognitive DysfunctionCytokinesFemaleHumansInflammation MediatorsLongitudinal StudiesMaleAmyloid beta-PeptidesCytokinesInflammation MediatorsAlzheimer’s diseaseAmyloid-betaCognitionCytokinesNeuroinflammationNo cognitive impairmentPerceptual speed

Identifiers

PMID34218796
PMCPMC8254948
OpenAlexW3183120271

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.