Evidence map›Paper›PMID 22619319›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

Plasmodium falciparum erythrocyte membrane protein 1 domain cassettes 8 and 13 are associated with severe malaria in children.

Thomas Lavstsen, Louise Turner, Fredy Saguti, Pamela Magistrado, Thomas S Rask, Jakob S Jespersen, Christian W Wang, Sanne S Berger, Vito Baraka, Andrea M Marquard and 5 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 191 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
191citing papers in PubMed, 1 pooled it
26.1field-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

191 citing papers in PubMed, 1 synthesis or guideline pooled it, 271 citations in OpenAlex.

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  18. Conserved multiepitopes inEmerging microbes & infections · 2025
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131 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 7 institutions in 3 countries.

Thomas LavstsenCentre for Medical Parasitology, Department of International Health, Immunology, and Microbiology, Faculty of Health Sciences, University of Copenhagen, Rigshospitalet, 1014 Copenhagen K, Denmark. thomasl@sund.ku.dk.
Louise Turner
Fredy Saguti
Pamela Magistrado
Thomas S Rask
Jakob S Jespersen
Christian W Wang
Sanne S Berger
Vito Baraka
Andrea M Marquard
Andaine Seguin-Orlando
Eske Willerslev
M Thomas P Gilbert
John Lusingu
Thor G Theander
University of Copenhagen · DKNational Institute for Medical Research · TZRigshospitalet · DKCopenhagen University Hospital · DKNatural History Museum Aarhus · DKTechnical University of Denmark · DKThe Francis Crick Institute · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The clinical outcome of Plasmodium falciparum infections ranges from asymptomatic parasitemia to severe malaria syndromes associated with high mortality. The virulence of P. falciparum infections is associated with the type of P. falciparum erythrocyte membrane protein 1 (PfEMP1) expressed on the surface of infected erythrocytes to anchor these to the vascular lining. Although var2csa, the var gene encoding the PfEMP1 associated with placental malaria, was discovered in 2003, the identification of the var/PfEMP1 variants associated with severe malaria in children has remained elusive. To identify var/PfEMP1 variants associated with severe disease outcome, we compared var transcript levels in parasites from 88 children with severe malaria and 40 children admitted to the hospital with uncomplicated malaria. Transcript analysis was performed by RT-quantitative PCR using a set of 42 primer pairs amplifying var subtype-specific loci covering most var/PfEMP1 subtypes. In addition, we characterized the near-full-length sequence of the most prominently expressed var genes in three patients diagnosed with severe anemia and/or cerebral malaria. The combined analysis showed that severe malaria syndromes, including severe anemia and cerebral malaria, are associated with high transcript levels of PfEMP1 domain cassette 8-encoding var genes. Transcript levels of group A var genes, including genes encoding domain cassette 13, were also significantly higher in patients with severe syndromes compared with those with uncomplicated malaria. This study specifies the var/PfEMP1 types expressed in severe malaria in children, and thereby provides unique targets for future efforts to prevent and treat severe malaria infections.

Indexed as

Genes, ProtozoanAnimalsChildHumansMalaria, FalciparumMolecular Sequence DataPlasmodium falciparumProtozoan Proteinserythrocyte membrane protein 1, Plasmodium falciparumProtozoan Proteins

Identifiers

PMID22619319
PMCPMC3387094
OpenAlexW1968708504

What OpenQuestion holds

Textmetadata
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.