Evidence map›Paper›PMID 18250177›Full record

ArticleInfection and immunity2008

Evidence for globally shared, cross-reacting polymorphic epitopes in the pregnancy-associated malaria vaccine candidate VAR2CSA.

Marion Avril, Bridget R Kulasekara, Severin O Gose, Chris Rowe, Madeleine Dahlbäck, Patrick E Duffy, Michal Fried, Ali Salanti, Lynda Misher, David L Narum and 1 more

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
7.6field-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

37 citing papers in PubMed, 51 citations in OpenAlex.

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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

11 authors at 3 institutions in 2 countries.

Marion AvrilSeattle Biomedical Research Institute, 307 Westlake Ave. N, Suite 500, Seattle, WA 98109-5219, USA.
Bridget R Kulasekara
Severin O Gose
Chris Rowe
Madeleine Dahlbäck
Patrick E Duffy
Michal Fried
Ali Salanti
Lynda Misher
David L Narum
Joseph D Smith
Center for Infectious Disease Research · USNational Institutes of Health · USUniversity of Copenhagen · DK

Funding

Malaria Vaccine: BSAMZIAAI001003 · NIAID · NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES · PI DUFFY, PATRICK · 2009 to 2012
$5.3M
Malaria Vaccines: BSAM-1/ALHYDROGEL + CPG 7909Z01AI001003 · NIAID · NIAID EXTRAMURAL ACTIVITIES · PI MILLER, LOUIS · 2007 to 2008
$4.6M
6 · The paper itself

Abstract

Pregnancy-associated malaria (PAM) is characterized by the placental sequestration of Plasmodium falciparum-infected erythrocytes (IEs) with the ability to bind to chondroitin sulfate A (CSA). VAR2CSA is a leading candidate for a pregnancy malaria vaccine, but its large size ( approximately 350 kDa) and extensive polymorphism may pose a challenge to vaccine development. In this study, rabbits were immunized with individual VAR2CSA Duffy binding-like (DBL) domains expressed in Pichia pastoris or var2csa plasmid DNA and sera were screened on different CSA-binding parasite lines. Rabbit antibodies to three recombinant proteins (DBL1, DBL3, and DBL6) and four plasmid DNAs (DBL1, DBL3, DBL5, and DBL6) reacted with homologous FCR3-CSA IEs. By comparison, antibodies to the DBL4 domain were unable to react with native VAR2CSA protein unless it was first partially proteolyzed with trypsin or chymotrypsin. To investigate the antigenic relationship of geographically diverse CSA-binding isolates, rabbit immune sera were screened on four heterologous CSA-binding lines from different continental origins. Antibodies did not target conserved epitopes exposed in all VAR2CSA alleles; however, antisera to several DBL domains cross-reacted on parasite isolates that had polymorphic loops in common with the homologous immunogen. This study demonstrates that VAR2CSA contains common polymorphic epitopes that are shared between geographically diverse CSA-binding lines.

Indexed as

Amino Acid SequenceAnimalsAntibodies, ProtozoanAntigens, ProtozoanCell LineCross ReactionsEpitopesFemaleHumansMalaria, FalciparumMalaria VaccinesMolecular Sequence DataPlasmodium falciparumPolymorphism, GeneticPregnancyRabbitsAntibodies, ProtozoanAntigens, ProtozoanEpitopesMalaria VaccinesRecombinant ProteinsVAR2CSA protein, Plasmodium falciparum

Identifiers

PMID18250177
PMCPMC2292848
OpenAlexW2161410547

What OpenQuestion holds

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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.