Evidence map›Paper›PMID 35659054›Full record

ArticleAlzheimer's research & therapy2022

The relationship between retinal layers and brain areas in asymptomatic first-degree relatives of sporadic forms of Alzheimer's disease: an exploratory analysis.

Inés López-Cuenca, Alberto Marcos-Dolado, Miguel Yus-Fuertes, Elena Salobrar-García, Lorena Elvira-Hurtado, José A Fernández-Albarral, Juan J Salazar, Ana I Ramírez, Lidia Sánchez-Puebla, Manuel Enrique Fuentes-Ferrer and 7 more

Open access · goldAbstract read
In one paragraph

Article in Alzheimer's research & therapy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 2 pooled it
3.4field-weighted citation impact, top 6% 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

19 citing papers in PubMed, 2 syntheses or guidelines pooled it, 30 citations in OpenAlex.

  1. Pooled it
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  19. Alzheimer's & dementia (New York, N. Y.)
    Article
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

17 authors at 3 institutions in 1 country.

Inés López-Cuenca *Ramon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Alberto Marcos-Dolado *Health Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Miguel Yus-Fuertes *Health Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Elena Salobrar-GarcíaRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Lorena Elvira-HurtadoRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
José A Fernández-AlbarralRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Juan J SalazarRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Ana I RamírezRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Lidia Sánchez-PueblaRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain.
Manuel Enrique Fuentes-FerrerHealth Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Ana BarabashHealth Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Federico Ramírez-TorañoLaboratory of Cognitive and Computational Neuroscience, Center for Biomedical Technology, Technical University of Madrid, Madrid, 28223, Spain.
Lidia Gil-MartínezFoundation for Biomedical Research at Hospital Clínico San Carlos (FIBHCSC), Hospital Clínico San Carlos, Madrid, 28040, Spain.
Juan Arrazola-GarcíaHealth Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Pedro GilHealth Research Institute of the Hospital Clínico San Carlos (IdISSC), Madrid, 28040, Spain.
Rosa de HozRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain. rdehoz@med.ucm.es.
José M RamírezRamon Castroviejo Institute of Ophthalmologic Research, Complutense University of Madrid, Madrid, 28040, Spain. ramirezs@med.ucm.es.ORCID 0000-0002-5145-5094
Universidad Complutense de Madrid · ESHospital Clínico San Carlos · ESInstituto de Salud Carlos III · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTwo main genetic risks for sporadic Alzheimer's disease (AD) are a family history and ɛ4 allele of apolipoprotein E. The brain and retina are part of the central nervous system and share pathophysiological mechanisms in AD.

methodsWe performed a cross-sectional study with 30 participants without a family history of sporadic AD (FH-) and noncarriers of ApoE ɛ4 (ApoE ɛ4-) as a control group and 34 participants with a family history of sporadic AD (FH+) and carriers of at least one ɛ4 allele (ApoE ɛ4+). We analyzed the correlations between macular volumes of retinal layers and thickness of the peripapillary retinal nerve fiber layer (pRNFL) measured by optical coherence tomography (OCT) with the brain area parameters measured by magnetic resonance imaging (MRI) in participants at high genetic risk of developing AD (FH+ ApoE ɛ4+).

resultsWe observed a significant volume reduction in the FH+ ApoE ɛ4+ group compared with the control group in some macular areas of (i) macular RNFL (mRNFL), (ii) inner plexiform layer (IPL), (iii) inner nuclear layer (INL), and (iv) outer plexiform layer (OPL). Furthermore, in the FH+ ApoE ɛ4+ group, the retinal sectors that showed statistically significant volume decrease correlated with brain areas that are affected in the early stages of AD. In the same group, the peripapillary retinal nerve fiber layer (pRNFL) did not show statistically significant changes in thickness compared with the control group. However, correlations of these sectors with the brain areas involved in this disease were also found.

conclusionsIn cognitively healthy participants at high genetic risk of developing sporadic forms of AD, there are significant correlations between retinal changes and brain areas closely related to AD such as the entorhinal cortex, the lingual gyrus, and the hippocampus.

Indexed as

Alzheimer DiseaseApolipoproteins EBrainCross-Sectional StudiesHumansRetinaTomography, Optical CoherenceApolipoproteins EAlzheimer’s diseaseApoE ɛ4BrainFamily historyMRIOCTRetina

Identifiers

PMID35659054
PMCPMC9166601
OpenAlexW4281749400

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.