Evidence map›Paper›PMID 21403675›Full record

ArticleMolecular psychiatry2012

Alzheimer risk associated with a copy number variation in the complement receptor 1 increasing C3b/C4b binding sites.

N Brouwers, C Van Cauwenberghe, S Engelborghs, J-C Lambert, K Bettens, N Le Bastard, F Pasquier, A Gil Montoya, K Peeters, M Mattheijssens and 6 more

Open access · hybridAbstract read
In one paragraph

Article in Molecular psychiatry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 140 papers, 9 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
140citing papers in PubMed, 9 pooled it
10.7field-weighted citation impact, top 1% 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

140 citing papers in PubMed, 9 syntheses or guidelines pooled it, 231 citations in OpenAlex.

  1. Pooled it
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  5. Pooled it
  6. Copy Number Variants in Alzheimer's Disease.Journal of Alzheimer's disease : JAD · 2017
    Pooled it
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  10. Article
  11. Review
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  17. fSuSiE enables fine-mapping of QTLs from genome-scale molecular profiles.bioRxiv : the preprint server for biology · 2025
    Article
  18. Article
  19. The Alzheimer's disease-associated complement receptor 1 variant confers risk by impacting glial phagocytosis.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Article
  20. Review

80 more citing papers are in PubMed but not listed here.

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

16 authors at 7 institutions in 2 countries.

N BrouwersNeurodegenerative Brain Diseases Group, Department of Molecular Genetics, VIB, Antwerpen, Belgium.
C Van Cauwenberghe
S Engelborghs
J-C Lambert
K Bettens
N Le Bastard
F Pasquier
A Gil Montoya
K Peeters
M Mattheijssens
R Vandenberghe
P P De Deyn
M Cruts
P Amouyel
K Sleegers
C Van Broeckhoven
VIB-UAntwerp Center for Molecular Neurology · BEUniversity of Antwerp · BEInserm · FRKU Leuven · BEUniversité de Lille · FRUniversité Lille Nord de France · FRZNA Middelheim Hospital · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Two multicentre genome-wide association (GWA) studies provided substantial evidence, implicating the complement receptor 1 gene (CR1) in Alzheimer disease (AD) genetic etiology. CR1 encodes a large transmembrane receptor with a crucial role in the immune complement cascade. We performed a genetic follow-up of the GWA CR1 association in a Flanders-Belgian cohort (n=1883), and investigated the effect of single-nucleotide polymorphisms (SNPs) located in the CR1 locus on AD risk and cerebrospinal fluid (CSF) biomarker levels. We obtained significant association (P(adj)<0.03; odds ratio (OR)=1.24 (95% confidence interval (CI): 1.02-1.51)) for one CR1 risk haplotype, and haplotype association was strongest in individuals carrying apolipoprotein E (APOE) ɛ4 alleles (P(adj)<0.006; OR=1.50 (95% CI: 1.08-2.09)). Also, four SNPs correlated with increased CSF amyloid Aβ₁₋₄₂ levels, suggesting a role for the CR1 protein in Aβ metabolism. Moreover, we quantified a low-copy repeat (LCR)-associated copy number variation (CNV) in CR1, producing different CR1 isoforms, CR1-F and CR1-S, and obtained significant association in carriers of CR1-S. We replicated the CR1 CNV association finding in a French cohort (n=2003) and calculated in the combined cohorts, an OR of 1.32; 95% CI: 1.10-1.59 (P=0.0025). Our data showed that the common AD risk association may well be explained by the presence of CR1-S increasing the number of C3b/C4b and cofactor activity sites and AD risk with 30% in CR1-S carriers. How precisely the different functional role of CR1-S in the immune complement cascade contributes to AD pathogenesis will need additional functional studies.

Indexed as

AgedAged, 80 and overAlzheimer DiseaseAmyloid beta-PeptidesApolipoprotein E4Cohort StudiesComplement Factor IDNA Copy Number VariationsFemaleGene FrequencyGenome-Wide Association StudyGenotypeHumansLogistic ModelsMaleMeta-Analysis as TopicAmyloid beta-Peptidesamyloid beta-protein (1-42)Apolipoprotein E4Complement Factor IPeptide FragmentsReceptors, Complementtau Proteins

Identifiers

PMID21403675
PMCPMC3265835
OpenAlexW2153240577

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.