Evidence map›Paper›PMID 27911290›Full record

ArticleJournal of Alzheimer's disease : JAD2017

Rare Genetic Variant in SORL1 May Increase Penetrance of Alzheimer's Disease in a Family with Several Generations of APOE-ɛ4 Homozygosity.

Eva Louwersheimer, Petra E Cohn-Hokke, Yolande A L Pijnenburg, Marjan M Weiss, Erik A Sistermans, Annemieke J Rozemuller, Marc Hulsman, John C van Swieten, Cock M van Duijn, Frederik Barkhof and 4 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of Alzheimer's disease : JAD, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
2.9field-weighted citation impact, top 9% 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

23 citing papers in PubMed, 1 synthesis or guideline pooled it, 38 citations in OpenAlex.

  1. Pooled it
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  6. TheProceedings of the National Academy of Sciences of the United States of America · 2024
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  11. Heterozygous and Homozygous Variants inInternational journal of molecular sciences · 2022
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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

14 authors at 3 institutions in 2 countries.

Eva LouwersheimerAlzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
Petra E Cohn-HokkeDepartment of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
Yolande A L PijnenburgAlzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
Marjan M WeissDepartment of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
Erik A SistermansDepartment of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
Annemieke J RozemullerDepartment of Pathology, VU University Medical Center, Amsterdam, The Netherlands.
Marc HulsmanDepartment of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
John C van SwietenDepartment of Clinical Genetics, VU University Medical Center, Amsterdam, The Netherlands.
Cock M van DuijnGenetic Epidemiology Unit, Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.
Frederik BarkhofDepartment of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands.
Teddy KoeneAlzheimer Center & Department of Medical Psychology, VU University Medical Center, Amsterdam, The Netherlands.
Philip ScheltensAlzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
Wiesje M Van der FlierAlzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
Henne HolstegeAlzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
Amsterdam UMC Location VUmc · NLAmsterdam Neuroscience · NLErasmus MC · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe major genetic risk factor for late onset Alzheimer's disease (AD) is the APOE-ɛ4 allele. However, APOE-ɛ4 homozygosity is not fully penetrant, suggesting co-occurrence of additional genetic variants.

objectiveTo identify genetic factors that, next to APOE-ɛ4 homozygosity, contribute to the development of AD.

methodsWe identified a family with nine AD patients spanning four generations, with an inheritance pattern suggestive of autosomal dominant AD, with no variants in PSEN1, PSEN2, or APP. We collected DNA from four affected and seven unaffected family members and performed exome sequencing on DNA from three affected and one unaffected family members.

resultsAll affected family members were homozygous for the APOE-ɛ4 allele. Statistical analysis revealed that AD onset in this family was significantly earlier than could be expected based on APOE genotype and gender. Next to APOE-ɛ4 homozygosity, we found that all four affected family members carried a rare variant in the VPS10 domain of the SORL1 gene, associated with AβPP processing and AD risk. Furthermore, three of four affected family members carried a rare variant in the TSHZ3 gene, also associated with AβPP processing. Affected family members presented between 61 and 74 years, with variable presence of microbleeds/cerebral amyloid angiopathy and electroencephalographic abnormalities.

conclusionWe hypothesize that next to APOE-ɛ4 homozygosity, impaired SORL1 protein function, and possibly impaired TSHZ3 function, further disturbed Aβ processing. The convergence of these genetic factors over several generations might clarify the increased AD penetrance and the autosomal dominant-like inheritance pattern of AD as observed in this family.

Indexed as

Family HealthAgedAlzheimer DiseaseAmyloid beta-Protein PrecursorApolipoprotein E4FemaleGenetic Predisposition to DiseaseGenotypeHomeodomain ProteinsHumansMaleMiddle AgedMutationNociceptin ReceptorPresenilin-1Presenilin-2Amyloid beta-Protein PrecursorApolipoprotein E4Homeodomain ProteinsNociceptin ReceptorOPRL1 protein, humanPresenilin-1Presenilin-2PSEN1 protein, humanPSEN2 protein, humanReceptors, OpioidTSHZ3 protein, humanAlzheimer’s diseaseAPOEgeneticspenetranceSORL1

Identifiers

PMID27911290
PMCPMC5240543
OpenAlexW2559259678

What OpenQuestion holds

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LicenceCC BY-NC
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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.