Cited by 228Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchComplement system in diseases

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

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Brouwers, N, Van Cauwenberghe, C, Engelborghs, S, Lambert, J-C, Bettens, K, Le Bastard, N, Pasquier, F, Montoya, A Gil +8 more·2012·Molecular Psychiatry

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.

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Authors
Brouwers, N., Van Cauwenberghe, C., Engelborghs, S., Lambert, J.-C., Bettens, K., Le Bastard, N., Pasquier, F., Montoya, A. G., Peeters, K., Mattheijssens, M., Vandenberghe, R., De Deyn, P. P., Cruts, M., Amouyel, P., Sleegers, K., & Van Broeckhoven, C.
Affiliations
  • VIB-UAntwerp Center for Molecular Neurology (BE)
  • University of Antwerp (BE)
  • Inserm (FR)
  • Centre Hospitalier Universitaire de Lille (FR)
  • KU Leuven (BE)
Venue
Molecular Psychiatry
Published
2011-03-15
Volume
17
Issue
2
Pages
223-233
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W2153240577
Cited by
227
References
39
Citations by year
2026: 8 · 2025: 11 · 2024: 17 · 2023: 13 · 2022: 9 · 2021: 23 · 2020: 15 · 2019: 16 · 2018: 9 · 2017: 11 · 2016: 13 · 2015: 20 · 2014: 13 · 2013: 16 · 2012: 27
FWCI
13.52
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
  • Trinity's Access to Research Output (TARA) (Trinity College Dublin) (submittedVersion)
  • VUBIR (Vrije Universiteit Brussel) (submittedVersion)
Funders
  • Institut National de la Santé et de la Recherche Médicale
  • Belgian Federal Science Policy Office
  • Fonds Wetenschappelijk Onderzoek (P6/43)
  • Universiteit Antwerpen
  • Vlaamse regering
  • Instituut Born-Bunge
  • Bijzonder Onderzoeksfonds UGent
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Immunology and Microbiology › Immunology › Complement system in diseases
Keywords
Alzheimer's disease, complement receptor 1, copy number variation, complement system, APOE ε4, amyloid-beta, cerebrospinal fluid biomarkers, risk haplotype, genetic risk
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Female, Gene Frequency, Genotype, Humans, Male, Peptide Fragments, Receptors, Complement, Meta-Analysis as Topic, Cohort Studies, Logistic Models, Odds Ratio, Amyloid beta-Peptides, tau Proteins, Complement Factor I, Polymorphism, Single Nucleotide, Apolipoprotein E4, Genome-Wide Association Study, DNA Copy Number Variations, Segmental Duplications, Genomic

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