Evidence map›Paper›PMID 22870063›Full record

ArticlePLoS biology2012

The evolutionary consequences of blood-stage vaccination on the rodent malaria Plasmodium chabaudi.

Victoria C Barclay, Derek Sim, Brian H K Chan, Lucas A Nell, Maia A Rabaa, Andrew S Bell, Robin F Anders, Andrew F Read

Open access · goldAbstract read
In one paragraph

Article in PLoS biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
6.9field-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

36 citing papers in PubMed, 65 citations in OpenAlex.

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  12. Contrasting evolution of virulence and replication rate in an emerging bacterial pathogen.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  13. Refugia and anthelmintic resistance: Concepts and challenges.International journal for parasitology. Drugs and drug resistance · 2019
    Review
  14. Article
  15. Why the evolution of vaccine resistance is less of a concern than the evolution of drug resistance.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  16. Resource-driven changes to host population stability alter the evolution of virulence and transmission.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2018
    Article
  17. Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 2 countries.

Victoria C BarclayCenter for Infectious Disease Dynamics, Department of Biology, The Pennsylvania State University, University Park, Pennsylvania, United States of America. vcb11@psu.edu
Derek Sim
Brian H K Chan
Lucas A Nell
Maia A Rabaa
Andrew S Bell
Robin F Anders
Andrew F Read
Center for Disease Dynamics, Economics & Policy · USPennsylvania State University · USLa Trobe University · AU

Funding

Wellcome Trust
6 · The paper itself

Abstract

Malaria vaccine developers are concerned that antigenic escape will erode vaccine efficacy. Evolutionary theorists have raised the possibility that some types of vaccine could also create conditions favoring the evolution of more virulent pathogens. Such evolution would put unvaccinated people at greater risk of severe disease. Here we test the impact of vaccination with a single highly purified antigen on the malaria parasite Plasmodium chabaudi evolving in laboratory mice. The antigen we used, AMA-1, is a component of several candidate malaria vaccines currently in various stages of trials in humans. We first found that a more virulent clone was less readily controlled by AMA-1-induced immunity than its less virulent progenitor. Replicated parasites were then serially passaged through control or AMA-1 vaccinated mice and evaluated after 10 and 21 rounds of selection. We found no evidence of evolution at the ama-1 locus. Instead, virulence evolved; AMA-1-selected parasites induced greater anemia in naïve mice than both control and ancestral parasites. Our data suggest that recombinant blood stage malaria vaccines can drive the evolution of more virulent malaria parasites.

Indexed as

Evolution, MolecularVaccinationAdjuvants, ImmunologicAnimalsAntigens, ProtozoanBase SequenceDNA, ProtozoanEpitopesMalariaMalaria VaccinesMembrane ProteinsMiceMolecular Sequence DataPlasmodium chabaudiProtozoan ProteinsSerial PassageAdjuvants, ImmunologicAntigens, Protozoanapical membrane antigen I, PlasmodiumDNA, ProtozoanEpitopesMalaria VaccinesMembrane ProteinsProtozoan Proteins

Identifiers

PMID22870063
PMCPMC3409122
OpenAlexW2060919025

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.