Evidence map›Paper›PMID 29720620›Full record

ArticleNature communications2018

Plasmepsin II-III copy number accounts for bimodal piperaquine resistance among Cambodian Plasmodium falciparum.

Selina Bopp, Pamela Magistrado, Wesley Wong, Stephen F Schaffner, Angana Mukherjee, Pharath Lim, Mehul Dhorda, Chanaki Amaratunga, Charles J Woodrow, Elizabeth A Ashley and 7 more

Abstract read
In one paragraph

Article in Nature communications, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 3 pooled it
–field-weighted citation impact
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

79 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Trial
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  7. Trial
  8. A Multidimensional Analysis of the Bimodal Piperaquine Response inbioRxiv : the preprint server for biology · 2026
    Article
  9. Article
  10. Article
  11. Article
  12. Changing genetic profiles ofAntimicrobial agents and chemotherapy · 2026
    Article
  13. Article
  14. Review
  15. A review on molecular markers ofJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2025
    Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

19 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

17 authors.

Selina BoppHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.ORCID http://orcid.org/0000-0002-9412-9766
Pamela MagistradoHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.
Wesley WongHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.
Stephen F SchaffnerHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.ORCID http://orcid.org/0000-0001-6699-3568
Angana MukherjeeHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.
Pharath LimNational Institutes of Health, Rockville, MD, 20892, USA.ORCID http://orcid.org/0000-0002-1012-2461
Mehul DhordaWorldwide Antimalarial Resistance Network, Bangkok, 10400, Thailand.
Chanaki AmaratungaNational Institutes of Health, Rockville, MD, 20892, USA.
Charles J WoodrowMahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand.
Elizabeth A AshleyMyanmar-Oxford Clinical Research Unit, Yangon, Myanmar.
Nicholas J WhiteMahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand.
Arjen M DondorpMahidol-Oxford Tropical Medicine Research Unit, Bangkok, 10400, Thailand.
Rick M FairhurstNational Institutes of Health, Rockville, MD, 20892, USA.
Frederic ArieyInstitut Cochin, INSERM U:1016, Parasitology-Mycology Unit, Cochin Hospital Paris Descartes University, Paris, 75014, France.
Didier MenardBiology of Host-Parasite Interactions Unit, Institut Pasteur, Paris, 75015, France.
Dyann F WirthHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA.
Sarah K VolkmanHarvard T.H. Chan School of Public Health, Boston, MA, 02115, USA. svolkman@hsph.harvard.edu.

Funding

International Research in Cambodia: Tropical Medicine and Vector Research ZIAAI001066 · NIAID · NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES · PI YEK, CHRISTINA · 2009 to 2025
$10.8M
6 · The paper itself

Abstract

Multidrug resistant Plasmodium falciparum in Southeast Asia endangers regional malaria elimination and threatens to spread to other malaria endemic areas. Understanding mechanisms of piperaquine (PPQ) resistance is crucial for tracking its emergence and spread, and to develop effective strategies for overcoming it. Here we analyze a mechanism of PPQ resistance in Cambodian parasites. Isolates exhibit a bimodal dose-response curve when exposed to PPQ, with the area under the curve quantifying their survival in vitro. Increased copy number for plasmepsin II and plasmepsin III appears to explain enhanced survival when exposed to PPQ in most, but not all cases. A panel of isogenic subclones reinforces the importance of plasmepsin II-III copy number to enhanced PPQ survival. We conjecture that factors producing increased parasite survival under PPQ exposure in vitro may drive clinical PPQ failures in the field.

Indexed as

Gene DosageAntimalarialsAspartic Acid EndopeptidasesCambodiaCell SurvivalDNA Copy Number VariationsDrug ResistanceHumansIsoenzymesPiperazinesPlasmodium falciparumProtozoan ProteinsQuinolinesWhole Genome SequencingAntimalarialsAspartic Acid EndopeptidasesIsoenzymespiperaquinePiperazinesplasmepsin IIProtozoan ProteinsQuinolines

Identifiers

PMID29720620
PMCPMC5931971

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.