Evidence map›Paper›PMID 36825534›Full record

ArticleGlia2023

Complement receptor 1 is expressed on brain cells and in the human brain.

Nikoleta Daskoulidou, Bethany Shaw, Megan Torvell, Lewis Watkins, Emma L Cope, Sarah M Carpanini, Nicholas D Allen, B Paul Morgan

Open access · hybridAbstract read
In one paragraph

Article in Glia, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
5.6field-weighted citation impact, top 3% 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

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.

  1. Pooled it
  2. Clusterin is enriched in plaque-associated astrocytes and localizes to synapses in Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Complement in brain and eye disease: shared mechanisms, convergent pathologies, and common therapeutic opportunities.Mammalian genome : official journal of the International Mammalian Genome Society · 2026
    Review
  8. Review
  9. Microglial phagocytosis in Alzheimer disease.Nature reviews. Neurology · 2026
    Review
  10. PreoperativeFrontiers in bioinformatics · 2026
    Review
  11. Review
  12. Review
  13. Review
  14. 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
  15. Review
  16. Review
  17. Article
  18. Review
  19. Article
  20. The complement system in neurodegenerative diseases.Clinical science (London, England : 1979) · 2024
    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

8 authors at 2 institutions in 1 country.

Nikoleta DaskoulidouUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0002-7782-1232
Bethany ShawUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0002-7092-3420
Megan TorvellUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0003-3789-1452
Lewis WatkinsUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0001-8901-8458
Emma L CopeSchool of Biosciences, Cardiff University, Cardiff, UK.ORCID 0000-0001-9722-1085
Sarah M CarpaniniUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0002-7609-7529
Nicholas D AllenUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0003-4009-186X
B Paul MorganUK Dementia Research Institute, Cardiff University, Cardiff, UK.ORCID 0000-0003-4075-7676
UK Dementia Research Institute · GBCardiff University · GB

Funding

Medical Research Council MC_EX_MR/N50192X/1
6 · The paper itself

Abstract

Genome wide association studies (GWAS) have highlighted the importance of the complement cascade in pathogenesis of Alzheimer's disease (AD). Complement receptor 1 (CR1; CD35) is among the top GWAS hits. The long variant of CR1 is associated with increased risk for AD; however, roles of CR1 in brain health and disease are poorly understood. A critical confounder is that brain expression of CR1 is controversial; failure to demonstrate brain expression has provoked the suggestion that peripherally expressed CR1 influences AD risk. We took a multi-pronged approach to establish whether CR1 is expressed in brain. Expression of CR1 at the protein and mRNA level was assessed in human microglial lines, induced pluripotent stem cell (iPSC)-derived microglia from two sources and brain tissue from AD and control donors. CR1 protein was detected in microglial lines and iPSC-derived microglia expressing different CR1 variants when immunostained with a validated panel of CR1-specific antibodies; cell extracts were positive for CR1 protein and mRNA. CR1 protein was detected in control and AD brains, co-localizing with astrocytes and microglia, and expression was significantly increased in AD compared to controls. CR1 mRNA expression was detected in all AD and control brain samples tested; expression was significantly increased in AD. The data unequivocally demonstrate that the CR1 transcript and protein are expressed in human microglia ex vivo and on microglia and astrocytes in situ in the human brain; the findings support the hypothesis that CR1 variants affect AD risk by directly impacting glial functions.

Indexed as

Alzheimer DiseaseGenome-Wide Association StudyBrainHumansMicrogliaReceptors, Complement 3bCR1 protein, humanReceptors, Complement 3bAlzheimer'scomplementCR1microglia

Identifiers

PMID36825534
PMCPMC10953339
OpenAlexW4321748550

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.