Evidence map›Paper›PMID 23977965›Full record

ArticleMalaria journal2013

High levels of IgG3 anti ICB2-5 in Plasmodium vivax-infected individuals who did not develop symptoms.

Fernanda G Versiani, Maria E M Almeida, Gisely C Melo, Francivaldo O L Versiani, Patrícia P Orlandi, Luís André M Mariúba, Leidiane A Soares, Luciana P Souza, Antonio A da Silva Balieiro, Wuelton M Monteiro and 4 more

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 5 pooled it
6.8field-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

25 citing papers in PubMed, 5 syntheses or guidelines pooled it, 36 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

14 authors at 5 institutions in 2 countries.

Fernanda G VersianiInstituto Leônidas e Maria Deane - Fiocruz, Rua Teresina 476, 69057-070 Manaus, AM, Brazil. paulonogueira@amazonia.fiocruz.br.
Maria E M Almeida
Gisely C Melo
Francivaldo O L Versiani
Patrícia P Orlandi
Luís André M Mariúba
Leidiane A Soares
Luciana P Souza
Antonio A da Silva Balieiro
Wuelton M Monteiro
Fabio T M Costa
Hernando A del Portillo
Marcus V G Lacerda
Paulo A Nogueira
Fundação Oswaldo Cruz · BRUniversidade Federal do Amazonas · BRInstitució Catalana de Recerca i Estudis Avançats · ESUniversidade do Estado do Amazonas · BRUniversidade Estadual de Campinas (UNICAMP) · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPlasmodium vivax has the potential to infect 2.85 billion individuals worldwide. Nevertheless, the limited number of studies investigating the immune status of individuals living in malaria-endemic areas, as well as the lack of reports investigating serological markers associated with clinical protection, has hampered development of vaccines for P. vivax. It was previously demonstrated that naturally total IgG against the N-terminus of P. vivax merozoite surface protein 1 (Pv-MSP1) was associated with reduced risk of malarial infection.

methodsImmune response against Pv-MSP1 (N-terminus) of 313 residents of the Rio Pardo rural settlement (Amazonas State, Brazil) was evaluated in a cross-sectional and longitudinal follow up over two months (on site) wherein gold standard diagnosis by thick blood smear and rRNA gene-based nested real-time PCR were used to discriminate symptomless Plasmodium vivax-infected individuals who did not develop clinical symptoms during a 2-months from those uninfected ones or who have had acute malaria. The acquisition of antibodies against Pv-MSP1 was also evaluated as survival analysis by prospective study over a year collecting information of new malaria infections in surveillance database.

resultsThe majority of P. vivax-infected individuals (52-67%) showed immune recognition of the N-terminus of Pv-MSP1. Interesting data on infected individuals who have not developed symptoms, total IgG levels against the N-terminus Pv-MSP1 were age-dependent and the IgG3 levels were significantly higher than levels of subjects had acute malaria or those uninfected ones. The total IgG anti ICB2-5 was detected to be an important factor of protection against new malaria vivax attacks in survival analysis in a prospective survey (p = 0.029).

conclusionsThe study findings illustrate the importance of IgG3 associated to 2-months of symptomless in P. vivax infected individuals and open perspectives for the rationale of malaria vaccine designs capable to sustain high levels of IgG3 against polymorphic malaria antigens.

Indexed as

AdolescentAdultAntibodies, ProtozoanAsymptomatic DiseasesBrazilChildChild, PreschoolCross-Sectional StudiesFemaleHumansImmunoglobulin GInfantInfant, NewbornLongitudinal StudiesMalaria, VivaxMaleAntibodies, ProtozoanImmunoglobulin GMerozoite Surface Protein 1

Identifiers

PMID23977965
PMCPMC3844576
OpenAlexW2156052556

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.