Evidence map›Paper›PMID 26626275›Full record

ArticleMalaria journal2015

Comparison of the specificity of antibodies to VAR2CSA in Cameroonian multigravidae with and without placental malaria: a retrospective case-control study.

Anna Babakhanyan, Rui Fang, Andrew Wey, Ali Salanti, Grace Sama, Canisia Efundem, Robert J I Leke, John J Chen, Rose G F Leke, Diane W Taylor

Open access · goldAbstract readComparative Study
In one paragraph

Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 13% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 27 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

10 authors at 3 institutions in 3 countries.

Anna BabakhanyanDepartment of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, BSB 320, Honolulu, HI, 96813, USA. annab8@hawaii.edu.
Rui FangDepartment of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, BSB 320, Honolulu, HI, 96813, USA. fangr@hawaii.edu.
Andrew WeyDepartment of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, BSB 320, Honolulu, HI, 96813, USA. awey@hawaii.edu.
Ali SalantiDepartment of Immunology and Microbiology, Centre for Medical Parasitology, University of Copenhagen, Copenhagen, Denmark. salanti@sund.ku.dk.
Grace SamaFaculty of Medicine and Biomedical Research, Biotechnology Centre, University of Yaounde 1, Yaounde, Cameroon. menyensg@yahoo.com.
Canisia EfundemFaculty of Medicine and Biomedical Research, Biotechnology Centre, University of Yaounde 1, Yaounde, Cameroon. caniciaearthlink@yahoo.com.
Robert J I LekeFaculty of Medicine and Biomedical Research, Biotechnology Centre, University of Yaounde 1, Yaounde, Cameroon. robertjleker@yahoo.fr.
John J ChenDepartment of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, BSB 320, Honolulu, HI, 96813, USA. jjchen@hawaii.edu.
Rose G F LekeFaculty of Medicine and Biomedical Research, Biotechnology Centre, University of Yaounde 1, Yaounde, Cameroon. roseleke@yahoo.com.
Diane W TaylorDepartment of Tropical Medicine, Medical Microbiology and Pharmacology, John A Burns School of Medicine, University of Hawaii at Manoa, 651 Ilalo Street, BSB 320, Honolulu, HI, 96813, USA. dwtaylor@hawaii.edu.
University of Hawaiʻi at Mānoa · USUniversité de Yaoundé I · CMUniversity of Copenhagen · DK

Funding

RESEARCH DESIGN AND BIOSTATISTICS COREU54MD007584 · NIMHD · UNIVERSITY OF HAWAII AT MANOA · PI HEDGES, JERRIS ROBERT, MOKUAU, NOREEN · 2012 to 2018
$21.1M
RESEARCH DESIGN, BIOSTATISTICS AND RESEARCH ETHICS COREG12MD007601 · NIMHD · UNIVERSITY OF HAWAII AT MANOA · PI BERRY, MARLA J · 2012 to 2016
$13.0M
Northern/Pacific Universities Global Health Research Training ConsortiumR25TW009345 · FIC · UNIVERSITY OF WASHINGTON · PI KOLARS, JOSEPH C., NERURKAR, VIVEK RAMCHANDRA · 2012 to 2016
$5.9M
Malarial Immunity in Pregnant Cameroonian WomenR01AI071160 · NIAID · UNIVERSITY OF HAWAII AT MANOA · PI TAYLOR, DIANE WALLACE · 2007 to 2011
$3.0M
TH2 BIAS EFFECT ON MALARIAL IMMUNITY IN CAMEROONU01AI043888 · NIAID · GEORGETOWN UNIVERSITY · PI TAYLOR, DIANE WALLACE · 1998 to 2002
$2.7M
Defining Immunity to Placental Malaria using a Multi-assay Predictive ModelR21AI105286 · NIAID · UNIVERSITY OF HAWAII AT MANOA · PI CHEN, JOHN J, TAYLOR, DIANE WALLACE · 2014 to 2015
$418k
FIC NIH HHS R25 TW009345NIAID NIH HHS R01 AI071160NIAID NIH HHS R01AI071160NIAID NIH HHS R21 AI105286NIAID NIH HHS R21AI105286-01NIAID NIH HHS U01 AI043888NIAID NIH HHS UO1AI43888NIMHD NIH HHS G12 MD007601NIMHD NIH HHS G12MD007601NIMHD NIH HHS U54 MD007584NIMHD NIH HHS U54MD007584
6 · The paper itself

Abstract

backgroundAntibodies (Ab) to VAR2CSA prevent Plasmodium falciparum-infected erythrocytes from sequestrating in the placenta, i.e., prevent placental malaria (PM). The specificity of Ab to VAR2CSA associated with absence of PM is unknown. Accordingly, differences in the specificity of Ab to VAR2CSA were compared between multigravidae with and without PM who had Ab to VAR2CSA.

methodsIn a retrospective case-control study, plasma collected from Cameroonian multigravidae with (n = 96) and without (n = 324) PM were screened in 21 assays that measured antibody levels to full length VAR2CSA (FV2), individual VAR2CSA DBL domains, VAR2CSA domains from different genetic backgrounds (variants), as well as proportion of high avidity Ab to FV2.

resultsMultigravidae with and without PM had similar levels of Ab to FV2, the six VAR2CSA DBL domains and different variants, while the proportion of high avidity Ab to FV2 was significantly higher in women without PM at delivery (p = 0.0030) compared to women with PM. In a logistic regression model adjusted for gravidity and age, the percentage of high avidity Ab to FV2 was associated with reduced likelihood of PM in multigravidae. A 5 % increase in proportion of high avidity Ab to FV2 was associated with a nearly 15 % lower likelihood of PM.

conclusionAb avidity to FV2 may be an important indicator of immunity to PM.

Indexed as

Antibody AffinityAdultAntibodies, ProtozoanAntigens, ProtozoanCameroonCase-Control StudiesFemaleHumansMalaria, FalciparumMalePlacenta DiseasesPregnancyPregnancy Complications, InfectiousRetrospective StudiesYoung AdultAntibodies, ProtozoanAntigens, ProtozoanVAR2CSA protein, Plasmodium falciparum

Identifiers

PMID26626275
PMCPMC4666123
OpenAlexW2182280323

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Registered trials

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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.