Evidence map›Paper›PMID 25305316›Full record

ArticleJournal of immunology (Baltimore, Md. : 1950)2014

Identification of factor H-like protein 1 as the predominant complement regulator in Bruch's membrane: implications for age-related macular degeneration.

Simon J Clark, Christoph Q Schmidt, Anne M White, Svetlana Hakobyan, B Paul Morgan, Paul N Bishop

Open access · bronzeAbstract read
In one paragraph

Article in Journal of immunology (Baltimore, Md. : 1950), 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed
9.7field-weighted citation impact, top 2% 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

78 citing papers in PubMed, 113 citations in OpenAlex.

  1. Article
  2. Review
  3. Review
  4. Review
  5. Article
  6. Complement system in cancer: friend or foe of immunotherapy.Journal for immunotherapy of cancer · 2026
    Review
  7. Review
  8. 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
  9. Review
  10. Evidence for the Pathogenicity of aMedicina (Kaunas, Lithuania) · 2025
    Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. The human factor H protein family - an update.Frontiers in immunology · 2024
    Review
  16. Review
  17. Review
  18. Article
  19. Article
  20. Review

18 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

6 authors at 3 institutions in 3 countries.

Simon J ClarkCentre for Hearing and Vision Research, Institute of Human Development, University of Manchester, Manchester M13 9PT, United Kingdom; Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester and Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, United Kingdom; simon.clark-3@manchester.ac.uk.ORCID http://orcid.org/0000-0001-8394-8355
Christoph Q SchmidtInstitute of Pharmacology of Natural Products and Clinical Pharmacology, Ulm University, 89081 Ulm, Germany;
Anne M WhiteCentre for Hearing and Vision Research, Institute of Human Development, University of Manchester, Manchester M13 9PT, United Kingdom; Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester and Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, United Kingdom;
Svetlana HakobyanComplement Biology Group, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; and.
B Paul MorganComplement Biology Group, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; and.
Paul N BishopCentre for Hearing and Vision Research, Institute of Human Development, University of Manchester, Manchester M13 9PT, United Kingdom; Centre for Advanced Discovery and Experimental Therapeutics, University of Manchester and Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester M13 9WL, United Kingdom; Manchester Royal Eye Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester M13 9WL, United Kingdom.
Manchester Academic Health Science Centre · GBInstitute of Infection and Immunity · CAUniversität Ulm · DE

Funding

Biotechnology and Biological Sciences Research CouncilMedical Research Council G0900538Medical Research Council G0900592Medical Research Council MR/K004441/1Medical Research Council MR/K024418/1Wellcome Trust
6 · The paper itself

Abstract

The tight regulation of innate immunity on extracellular matrix (ECM) is a vital part of immune homeostasis throughout the human body, and disruption to this regulation in the eye is thought to contribute directly to the progression of age-related macular degeneration (AMD). The plasma complement regulator factor H (FH) is thought to be the main regulator that protects ECM against damaging complement activation. However, in the present study we demonstrate that a truncated form of FH, called FH-like protein 1 (FHL-1), is the main regulatory protein in the layer of ECM under human retina, called Bruch's membrane. Bruch's membrane is a major site of AMD disease pathogenesis and where drusen, the hallmark lesions of AMD, form. We show that FHL-1 can passively diffuse through Bruch's membrane, whereas the full sized, glycosylated, FH cannot. FHL-1 is largely bound to Bruch's membrane through interactions with heparan sulfate, and we show that the common Y402H polymorphism in the CFH gene, associated with an increased risk of AMD, reduces the binding of FHL-1 to this heparan sulfate. We also show that FHL-1 is retained in drusen whereas FH coats the periphery of the lesions, perhaps inhibiting their clearance. Our results identify a novel mechanism of complement regulation in the human eye, which highlights potential new avenues for therapeutic strategies.

Indexed as

Bruch MembraneComplement ActivationComplement C3b Inactivator ProteinsComplement Factor HExtracellular MatrixGene Expression RegulationGlycosylationHeparan SulfateHomeostasisHumansImmunity, InnateMacular DegenerationProtein BindingProtein TransportRetinaRetinal DrusenCFHR1 protein, humanComplement C3b Inactivator ProteinsComplement Factor HHeparan Sulfate

Identifiers

PMID25305316
PMCPMC4225158
OpenAlexW1871202872

What OpenQuestion holds

Textmetadata
LicenceTDM
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.