Evidence map›Paper›PMID 29636510›Full record

ArticleScientific reports2018

Plasmodium falciparum strains spontaneously switch invasion phenotype in suspension culture.

Gordon A Awandare, Prince B Nyarko, Yaw Aniweh, Reuben Ayivor-Djanie, José A Stoute

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
3.7field-weighted citation impact, top 7% 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, 34 citations in OpenAlex.

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  8. Phenotypic characterization of GhanaianFrontiers in immunology · 2022
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  9. Biophysical Tools and Concepts Enable Understanding of Asexual Blood Stage Malaria.Frontiers in cellular and infection microbiology · 2022
    Review
  10. Continuous Cultures ofMediterranean journal of hematology and infectious diseases · 2021
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  11. Localization and function of aExperimental biology and medicine (Maywood, N.J.) · 2021
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  16. Frontiers in immunology · 2020
    Article
  17. Molecular Characterization and Immuno-Reactivity Patterns of a NovelFrontiers in cellular and infection microbiology · 2020
    Article
  18. Article
  19. Parasite-Related Genetic and Epigenetic Aspects and Host Factors InfluencingFrontiers in cellular and infection microbiology · 2018
    Review
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

5 authors at 2 institutions in 2 countries.

Gordon A AwandareWest African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Legon, Ghana. gawandare@ug.edu.gh.ORCID 0000-0002-8793-3641
Prince B NyarkoWest African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Legon, Ghana.ORCID 0000-0002-8236-1111
Yaw AniwehWest African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Legon, Ghana.ORCID 0000-0002-8415-2727
Reuben Ayivor-DjanieWest African Centre for Cell Biology of Infectious Pathogens, University of Ghana, Legon, Ghana.
José A StouteDepartment of Medicine, Pennsylvania State University College of Medicine, Hershey, PA, USA.
University of Ghana · GHPennsylvania State University · US

Funding

Wellcome TrustWellcome Trust 107755/Z/15/Z
6 · The paper itself

Abstract

The extensive redundancy in the use of invasion ligands by Plasmodium falciparum, and its unique ability to switch between invasion pathways have hampered vaccine development. P. falciparum strains Dd2 and W2mef have been shown to change from sialic acid (SA)-dependent to SA-independent phenotypes when selected on neuraminidase-treated erythrocytes. Following an observation of increasing ability of Dd2 to invade neuraminidase-treated cells when cultured for several weeks, we systematically investigated this phenomenon by comparing invasion phenotypes of Dd2, W2mef and 3D7 strains of P. falciparum that were cultured with gentle shaking (Suspended) or under static (Static) conditions. While Static Dd2 and W2mef remained SA-dependent for the entire duration of the investigation, Suspended parasites spontaneously and progressively switched to SA-independent phenotype from week 2 onwards. Furthermore, returning Suspended cultures to Static conditions led to a gradual reversal to SA-dependent phenotype. The switch to SA-independent phenotype was accompanied by upregulation of the key invasion ligand, reticulocyte-binding homologue 4 (RH4), and the increased invasion was inhibited by antibodies to the RH4 receptor, CR1. Our data demonstrates a novel mechanism for inducing the switching of invasion pathways in P. falciparum parasites and may provide clues for understanding the mechanisms involved.

Indexed as

PhenotypeErythrocytesGene Expression RegulationHumansMalaria, FalciparumMembrane ProteinsN-Acetylneuraminic AcidNeuraminidasePlasmodium falciparumProtozoan ProteinsMembrane ProteinsN-Acetylneuraminic AcidNeuraminidaseProtozoan ProteinsRH4 protein, Plasmodium falciparum

Identifiers

PMID29636510
PMCPMC5893586
OpenAlexW2798031204

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.