Evidence map›Paper›PMID 20398182›Full record

ArticleParasite immunology2010

Allele-specific antibodies to Plasmodium falciparum merozoite surface protein-2 and protection against clinical malaria.

F H A Osier, L M Murungi, G Fegan, J Tuju, K K Tetteh, P C Bull, D J Conway, K Marsh

Open access · greenAbstract read
In one paragraph

Article in Parasite immunology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

22 citing papers in PubMed, 33 citations in OpenAlex.

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  7. Inclusion of an OptimizedJournal of immunology (Baltimore, Md. : 1950) · 2021
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  15. Observational
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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

8 authors at 2 institutions in 3 countries.

F H A OsierKEMRI-Centre for Geographic Medicine Research, Coast, Kilifi, Kenya. fosier@kilifi.kemri-wellcome.org
L M Murungi
G Fegan
J Tuju
K K Tetteh
P C Bull
D J Conway
K Marsh
Kenya Medical Research Institute · KELondon School of Hygiene & Tropical Medicine · GB

Funding

Wellcome TrustWellcome Trust 073591
6 · The paper itself

Abstract

IgG and IgG3 antibodies to merozoite surface protein-2 (MSP-2) of Plasmodium falciparum have been associated with protection from clinical malaria in independent studies. We determined whether this protection was allele-specific by testing whether children who developed clinical malaria lacked IgG/IgG3 antibodies specific to the dominant msp2 parasite genotypes detected during clinical episodes. We analysed pre-existing IgG and IgG1/IgG3 antibodies to antigens representing the major dimorphic types of MSP-2 by ELISA. We used quantitative real-time PCR to determine the dominant msp2 alleles in parasites detected in clinical episodes. Over half (55%, 80/146) of infections contained both allelic types. Single or dominant IC1- and FC27-like alleles were detected in 46% and 42% of infections respectively, and both types were equally dominant in 12%. High levels of IgG/IgG3 antibodies to the FC27-like antigen were not significantly associated with a lower likelihood of clinical episodes caused by parasites bearing FC27-like compared to IC1-like alleles, and vice versa for IgG/IgG3 antibodies to the IC1-like antigen. These findings were supported by competition ELISAs which demonstrated the presence of IgG antibodies to allele-specific epitopes within both antigens. Thus, even for this well-studied antigen, the importance of an allele-specific component of naturally acquired protective immunity to malaria remains to be confirmed.

Indexed as

AllelesAnimalsAntibodies, ProtozoanAntigens, ProtozoanChild, PreschoolDNA, ProtozoanEnzyme-Linked Immunosorbent AssayHumansImmunoglobulin GInfantMalaria, FalciparumPlasmodium falciparumPolymerase Chain ReactionProtozoan ProteinsAntibodies, ProtozoanAntigens, ProtozoanDNA, ProtozoanImmunoglobulin Gmerozoite surface protein 2, PlasmodiumProtozoan Proteins

Identifiers

PMID20398182
PMCPMC2847195
OpenAlexW2039105733

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.