Evidence map›Paper›PMID 20165550›Full record

ArticleScience translational medicine2009

Extreme polymorphism in a vaccine antigen and risk of clinical malaria: implications for vaccine development.

Shannon L Takala, Drissa Coulibaly, Mahamadou A Thera, Adrian H Batchelor, Michael P Cummings, Ananias A Escalante, Amed Ouattara, Karim Traoré, Amadou Niangaly, Abdoulaye A Djimdé and 2 more

Open access · greenAbstract read
In one paragraph

Article in Science translational medicine, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 128 papers.

0numbers the graph read from it
0cells of the map it votes in
128citing papers in PubMed
11.1field-weighted citation impact, top 1% 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

128 citing papers in PubMed, 198 citations in OpenAlex.

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  6. A field trial to assess a blood-stage malaria vaccine.The New England journal of medicine · 2011
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  10. Antibody Responses to the ConservedPathogens (Basel, Switzerland) · 2026
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68 more citing papers are in PubMed but not listed here.

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

12 authors at 3 institutions in 1 country.

Shannon L TakalaHoward Hughes Medical Institute and Center for Vaccine Development, University of Maryland School of Medicine, 685 West Baltimore Street, Baltimore, MD 21201, USA.
Drissa Coulibaly
Mahamadou A Thera
Adrian H Batchelor
Michael P Cummings
Ananias A Escalante
Amed Ouattara
Karim Traoré
Amadou Niangaly
Abdoulaye A Djimdé
Ogobara K Doumbo
Christopher V Plowe
Arizona State University · USUniversity of Maryland, Baltimore · USUniversity of Maryland, College Park · US

Funding

Clinical Research Career Development (RMI)K12RR023250 · NCRR · UNIVERSITY OF MARYLAND BALTIMORE · PI SHULDINER, ALAN R. · 2005 to 2009
$13.3M
Safety, Immunogenicity and Efficacy of VaccineU19AI065683 · NIAID · UNIVERSITY OF MARYLAND BALTIMORE · PI PLOWE, CHRISTOPHER V. · 2005 to 2009
$4.7M
Malaria:Clinical Research and Trial Preparation Sites-26685346N01AI085346 · NIAID · Univ Maryland · 1998 to 2004
$2.8M
Howard Hughes Medical InstituteNCRR NIH HHS K12 RR023250NIAID NIH HHS N01 AI085346NIAID NIH HHS U19 AI065683
6 · The paper itself

Abstract

Vaccines directed against the blood stages of Plasmodium falciparum malaria are intended to prevent the parasite from invading and replicating within host cells. No blood-stage malaria vaccine has shown clinical efficacy in humans. Most malaria vaccine antigens are parasite surface proteins that have evolved extensive genetic diversity, and this diversity could allow malaria parasites to escape vaccine-induced immunity. We examined the extent and within-host dynamics of genetic diversity in the blood-stage malaria vaccine antigen apical membrane antigen-1 in a longitudinal study in Mali. Two hundred and fourteen unique apical membrane antigen-1 haplotypes were identified among 506 human infections, and amino acid changes near a putative invasion machinery binding site were strongly associated with the development of clinical symptoms, suggesting that these residues may be important to consider in designing polyvalent apical membrane antigen-1 vaccines and in assessing vaccine efficacy in field trials. This extreme diversity may pose a serious obstacle to an effective polyvalent recombinant subunit apical membrane antigen-1 vaccine.

Indexed as

Polymorphism, GeneticAntigens, ProtozoanHumansLongitudinal StudiesMalaria, FalciparumMalaria VaccinesMaliPlasmodium falciparumRisk FactorsAntigens, ProtozoanMalaria Vaccines

Identifiers

PMID20165550
PMCPMC2822345
OpenAlexW2113495688

What OpenQuestion holds

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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.