Evidence map›Paper›PMID 21817955›Full record

ArticleThe Pediatric infectious disease journal2011

Antibodies to Plasmodium falciparum erythrocyte-binding antigen-175 are associated with protection from clinical malaria.

Matthew B McCarra, George Ayodo, Peter O Sumba, James W Kazura, Ann M Moormann, David L Narum, Chandy C John

Abstract read
In one paragraph

Article in The Pediatric infectious disease journal, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
5.0field-weighted citation impact, top 5% 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

23 citing papers in PubMed, 35 citations in OpenAlex.

  1. Trial
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  5. Antibody Correlates of Protection from ClinicalThe American journal of tropical medicine and hygiene · 2020
    Review
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  11. Acquisition of Functional Antibodies That Block the Binding of Erythrocyte-Binding Antigen 175 and Protection Against Plasmodium falciparum Malaria in Children.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2015
    Article
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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

7 authors at 5 institutions in 2 countries.

Matthew B McCarraDivision of Global Pediatrics, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN 55414, USA.
George Ayodo
Peter O Sumba
James W Kazura
Ann M Moormann
David L Narum
Chandy C John
Kenya Medical Research Institute · KECase Western Reserve University · USNational Institutes of Health · USUniversity of Massachusetts Boston · USUniversity of Minnesota Medical Center · US

Funding

MALARIA VACCINE PRODUCTION &SUPPORT SERVICESN01AI005421 · NIAID · SCIENCE APPLICATIONS INTERNATIONAL CORP · PI BANCROFT, WILLIAM H. · 2000 to 2000
$6.1M
Human immunity to MSP-1 in Western KenyaR01AI043906 · NIAID · CASE WESTERN RESERVE UNIVERSITY · PI KAZURA, JAMES WALTER · 2004 to 2008
$3.0M
Malaria transmission and immunity in highland KenyaU01AI056270 · NIAID · UNIVERSITY OF MINNESOTA TWIN CITIES · PI JOHN, CHANDY C. · 2005 to 2009
$2.9M
Translational Research in Malaria Transmission and Immunity in KenyaD43TW008085 · FIC · UNIVERSITY OF MINNESOTA · PI JOHN, CHANDY C. · 2008 to 2012
$752k
FIC NIH HHS D43 TW008085Intramural NIH HHSNIAID NIH HHS N01 AI005421NIAID NIH HHS R01 AI043906NIAID NIH HHS R01AI043906NIAID NIH HHS U01 AI056270
6 · The paper itself

Abstract

backgroundAntibodies to blood-stage Plasmodium falciparum antigens have been associated with protection against clinical malaria in some studies but not others. Many of these studies have not assessed whether high-titer antibodies are associated with protection and have not adjusted for differences in malaria exposure.

methodsThe presence of high-titer antibodies to apical membrane antigen-1, erythrocyte-binding antigen-175 (EBA-175), and merozoite surface protein-1₁₉ (MSP-1₁₉) was assessed in 87 children living in a malaria holoendemic area of Kenya. The children were prospectively assessed during 1 year for clinical malaria.

resultsIn unadjusted analyses, high-titer antibodies to MSP-1₁₉, but not EBA-175 or apical membrane antigen-1, were associated with protection from clinical malaria. However, after adjustment for exposure, only high-titer antibodies to EBA-175 were associated with protection from clinical malaria (hazard ratio, 0.48; 95% confidence interval [CI], 0.24, 0.95; P = 0.03), and with reduced episodes of clinical malaria (incidence rate ratio, 0.50; 95% CI, 0.31, 0.81; P = 0.005). A trend toward increased protection from clinical malaria in children was seen with antibodies to both EBA-175 and MSP-1₁₉ (hazard ratio, 0.26; 95% CI, 0.03, 1.94; P = 0.18).

conclusionsHigh-titer antibodies to EBA-175 are associated with protection from clinical malaria in children in a malaria holoendemic area of Kenya. Accurate estimates of antibody-associated protection from clinical malaria require adjustment for malaria exposure.

Indexed as

Antibodies, ProtozoanAntigens, ProtozoanChildChild, PreschoolChi-Square DistributionHumansImmunoglobulin GInfantKaplan-Meier EstimateKenyaMalaria, FalciparumMembrane ProteinsMerozoite Surface Protein 1Plasmodium falciparumProtozoan ProteinsRisk FactorsAntibodies, ProtozoanAntigens, Protozoanapical membrane antigen I, Plasmodiumerythrocyte-binding antigen 175, PlasmodiumImmunoglobulin GMembrane ProteinsMerozoite Surface Protein 1Protozoan Proteins

Identifiers

PMID21817955
PMCPMC3222715
OpenAlexW1987517914

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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.