Evidence map›Paper›PMID 18433451›Full record

ArticleMolecular microbiology2008

Plasmodium falciparum antigenic variation. Mapping mosaic var gene sequences onto a network of shared, highly polymorphic sequence blocks.

Peter C Bull, Caroline O Buckee, Sue Kyes, Moses M Kortok, Vandana Thathy, Bernard Guyah, José A Stoute, Chris I Newbold, Kevin Marsh

Open access · greenAbstract readComparative Study
In one paragraph

Article in Molecular microbiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
7.9field-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

64 citing papers in PubMed, 100 citations in OpenAlex.

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4 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

9 authors at 3 institutions in 2 countries.

Peter C BullKenya Medical Research Institute, Centre for Geographic Medicine Research, Coast, Kilifi, Kenya. pbull@kilifi.kemri-wellcome.org
Caroline O Buckee
Sue Kyes
Moses M Kortok
Vandana Thathy
Bernard Guyah
José A Stoute
Chris I Newbold
Kevin Marsh
John Radcliffe Hospital · GBUnited States Army Medical Research Directorate - Africa · KEKenya Medical Research Institute · KE

Funding

Pediatric malaria research fellowship training programD43TW006239 · FIC · WALTER REED ARMY INSTITUTE OF RESEARCH · PI STOUTE, JOSE ANTONIO · 2003 to 2006
$398k
FIC NIH HHS 1 D43 TW06239FIC NIH HHS D43 TW006239NHLBI NIH HHS R01 HL 7502Wellcome TrustWellcome Trust 060678Wellcome Trust 076030
6 · The paper itself

Abstract

Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) is a potentially important family of immune targets, encoded by an extremely diverse gene family called var. Understanding of the genetic organization of var genes is hampered by sequence mosaicism that results from a long history of non-homologous recombination. Here we have used software designed to analyse social networks to visualize the relationships between large collections of short var sequences tags sampled from clinical parasite isolates. In this approach, two sequences are connected if they share one or more highly polymorphic sequence blocks. The results show that the majority of analysed sequences including several var-like sequences from the chimpanzee parasite Plasmodium reichenowi can be either directly or indirectly linked together in a single unbroken network. However, the network is highly structured and contains putative subgroups of recombining sequences. The major subgroup contains the previously described group A var genes, previously proposed to be genetically distinct. Another subgroup contains sequences found to be associated with rosetting, a parasite virulence phenotype. The mosaic structure of the sequences and their division into subgroups may reflect the conflicting problems of maximizing antigenic diversity and minimizing epitope sharing between variants while maintaining their host cell binding functions.

Indexed as

Antigenic VariationPolymorphism, GeneticRecombination, GeneticAmino Acid SequenceAnimalsAntigens, ProtozoanChildConserved SequenceHumansMalaria, FalciparumPlasmodium falciparumProtozoan ProteinsSequence AlignmentAntigens, Protozoanerythrocyte membrane protein 1, Plasmodium falciparumProtozoan Proteins

Identifiers

PMID18433451
PMCPMC2440560
OpenAlexW2020489688

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.