Evidence map›Paper›PMID 28419281›Full record

ArticleThe Journal of infectious diseases2017

Expression of the Plasmodium falciparum Clonally Variant clag3 Genes in Human Infections.

Sofía Mira-Martínez, Evi van Schuppen, Alfred Amambua-Ngwa, Emmanuel Bottieau, Muna Affara, Marjan Van Esbroeck, Erika Vlieghe, Pieter Guetens, Núria Rovira-Graells, Gloria P Gómez-Pérez and 4 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.0field-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

23 citing papers in PubMed, 38 citations in OpenAlex.

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  6. Microorganisms · 2024
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  12. Native structure of the RhopH complex, a key determinant of malaria parasite nutrient acquisition.Proceedings of the National Academy of Sciences of the United States of America · 2021
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  17. From Genes to Transcripts, a Tightly Regulated Journey inFrontiers in cellular and infection microbiology · 2020
    Review
  18. Review
  19. Article
  20. Article
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 6 institutions in 4 countries.

Sofía Mira-MartínezInstitute of Tropical Medicine, Antwerp, Belgium.
Evi van SchuppenBarcelona Institute for Global Health (ISGlobal), Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain.
Alfred Amambua-NgwaMedical Research Council Unit, Fajara, The Gambia.
Emmanuel BottieauInstitute of Tropical Medicine, Antwerp, Belgium.
Muna AffaraMedical Research Council Unit, Fajara, The Gambia.
Marjan Van EsbroeckInstitute of Tropical Medicine, Antwerp, Belgium.
Erika VliegheInstitute of Tropical Medicine, Antwerp, Belgium.
Pieter GuetensInstitute of Tropical Medicine, Antwerp, Belgium.
Núria Rovira-GraellsBarcelona Institute for Global Health (ISGlobal), Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain.
Gloria P Gómez-PérezBarcelona Institute for Global Health (ISGlobal), Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain.
Pedro L AlonsoBarcelona Institute for Global Health (ISGlobal), Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain.
Umberto D'AlessandroInstitute of Tropical Medicine, Antwerp, Belgium.
Anna Rosanas-UrgellInstitute of Tropical Medicine, Antwerp, Belgium.
Alfred CortésBarcelona Institute for Global Health (ISGlobal), Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain.
Instituut voor Tropische Geneeskunde · BEBarcelona Institute for Global Health · ESMRC Unit the Gambia · GMUniversitat de Barcelona · ESInstitut Català de Ciències del Clima · ESLondon School of Hygiene & Tropical Medicine · GB

Funding

Universal Attenuated Sporozoite Vaccine and Challenge SystemR44AI058375 · NIAID · SANARIA, INC. · PI HOFFMAN, STEPHEN LEV · 2006 to 2018
$9.9M
Medical Research Council MC_UP_A900_1119NIAID NIH HHS R44 AI058375
6 · The paper itself

Abstract

Background: Many genes of the malaria parasite Plasmodium falciparum show clonally variant expression regulated at the epigenetic level. These genes participate in fundamental host-parasite interactions and contribute to adaptive processes. However, little is known about their expression patterns during human infections. A peculiar case of clonally variant genes are the 2 nearly identical clag3 genes, clag3.1 and clag3.2, which mediate nutrient uptake and are linked to resistance to some toxic compounds. Methods: We developed a procedure to characterize the expression of clag3 genes in naturally infected patients and in experimentally infected human volunteers. Results: We provide the first description of clag3 expression during human infections, which revealed mutually exclusive expression and identified the gene predominantly expressed. Adaptation to culture conditions or selection with a toxic compound resulted in isolate-dependent changes in clag3 expression. We also found that clag3 expression patterns were reset during transmission stages. Conclusions: Different environment conditions select for parasites with different clag3 expression patterns, implying functional differences between the proteins encoded. The epigenetic memory is likely erased before parasites start infection of a new human host. Altogether, our findings support the idea that clonally variant genes facilitate the adaptation of parasite populations to changing conditions through bet-hedging strategies.

Indexed as

AdultAntimalarialsChildCohort StudiesDrug ResistanceEpigenesis, GeneticGambiaGene Expression ProfilingGene Expression RegulationGenes, ProtozoanHost-Parasite InteractionsHumansMalaria, FalciparumPlasmodium falciparumProtozoan ProteinsAntimalarialscytoadherence-linked asexual protein 3, Plasmodium falciparumProtozoan Proteinsadaptationbet-hedgingclag3controlled human malaria infection (CHMI)epigeneticsMalariamutually exclusive gene expressionPlasmodium falciparumtranscriptiontranscriptional variation

Identifiers

PMID28419281
PMCPMC5407054
OpenAlexW2606437305

What OpenQuestion holds

Textmetadata
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.