Evidence map›Paper›PMID 20824088›Full record

ArticlePLoS pathogens2010

Surface co-expression of two different PfEMP1 antigens on single plasmodium falciparum-infected erythrocytes facilitates binding to ICAM1 and PECAM1.

Louise Joergensen, Dominique C Bengtsson, Anja Bengtsson, Elena Ronander, Sanne S Berger, Louise Turner, Michael B Dalgaard, Gerald K K Cham, Michala E Victor, Thomas Lavstsen and 3 more

Open access · goldAbstract read
In one paragraph

Article in PLoS pathogens, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed
12.8field-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

73 citing papers in PubMed, 132 citations in OpenAlex.

  1. Trial
  2. Article
  3. Epigenetics and chromatin structure regulatebioRxiv : the preprint server for biology · 2026
    Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Surface Plasmon Resonance Analysis of PfEMP1 Interaction with Receptors.Methods in molecular biology (Clifton, N.J.) · 2022
    Article
  20. Production of anti-PfEMP1 Polyclonal Antisera in Rats and Mice.Methods in molecular biology (Clifton, N.J.) · 2022
    Article

13 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

13 authors at 3 institutions in 2 countries.

Louise JoergensenCentre for Medical Parasitology, Department of International Health, Immunology & Microbiology, Faculty of Health Sciences, University of Copenhagen and Department of Infectious Diseases, Copenhagen University Hospital (Rigshospitalet), Copenhagen, Denmark.
Dominique C Bengtsson
Anja Bengtsson
Elena Ronander
Sanne S Berger
Louise Turner
Michael B Dalgaard
Gerald K K Cham
Michala E Victor
Thomas Lavstsen
Thor G Theander
David E Arnot
Anja T R Jensen
Copenhagen University Hospital · DKUniversity of Copenhagen · DKRigshospitalet · DK

Funding

Howard Hughes Medical Institute 55005511
6 · The paper itself

Abstract

The Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) antigens play a major role in cytoadhesion of infected erythrocytes (IE), antigenic variation, and immunity to malaria. The current consensus on control of variant surface antigen expression is that only one PfEMP1 encoded by one var gene is expressed per cell at a time. We measured var mRNA transcript levels by real-time Q-PCR, analysed var gene transcripts by single-cell FISH and directly compared these with PfEMP1 antigen surface expression and cytoadhesion in three different antibody-selected P. falciparum 3D7 sub-lines using live confocal microscopy, flow cytometry and in vitro adhesion assays. We found that one selected parasite sub-line simultaneously expressed two different var genes as surface antigens, on single IE. Importantly, and of physiological relevance to adhesion and malaria pathogenesis, this parasite sub-line was found to bind both CD31/PECAM1 and CD54/ICAM1 and to adhere twice as efficiently to human endothelial cells, compared to infected cells having only one PfEMP1 variant on the surface. These new results on PfEMP1 antigen expression indicate that a re-evaluation of the molecular mechanisms involved in P. falciparum adhesion and of the accepted paradigm of absolutely mutually exclusive var gene transcription is required.

Indexed as

Antigenic VariationAntigens, SurfaceBlotting, NorthernBlotting, WesternCell AdhesionCell MovementEnzyme-Linked Immunosorbent AssayErythrocytesFlow CytometryHumansImmunoenzyme TechniquesIn Situ Hybridization, FluorescenceIntercellular Adhesion Molecule-1Malaria, FalciparumPlasmodium falciparumPlatelet Endothelial Cell Adhesion Molecule-1Antigens, Surfaceerythrocyte membrane protein 1, Plasmodium falciparumIntercellular Adhesion Molecule-1Platelet Endothelial Cell Adhesion Molecule-1Protozoan ProteinsRNA, Messenger

Identifiers

PMID20824088
PMCPMC2932717
OpenAlexW2094545320

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.