Evidence map›Paper›PMID 34565372›Full record

ArticleMalaria journal2021

A portfolio of geographically distinct laboratory-adapted Plasmodium falciparum clones with consistent infection rates in Anopheles mosquitoes.

Marga van de Vegte-Bolmer, Wouter Graumans, Rianne Stoter, Geert-Jan van Gemert, Robert Sauerwein, Katharine A Collins, Teun Bousema

Abstract read
In one paragraph

Article in Malaria journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–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

13 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Gametocyte production and transmission fitness of African and AsianAntimicrobial agents and chemotherapy · 2025
    Article
  6. Gametocyte production and transmission fitness of African and AsianbioRxiv : the preprint server for biology · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Quantifying Reductions inFrontiers in immunology · 2022
    Article
  13. 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

7 authors.

Marga van de Vegte-Bolmer *Radboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands. Marga.vandeVegte-Bolmer@radboudumc.nl.
Wouter Graumans *Radboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands.
Rianne StoterRadboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands.
Geert-Jan van GemertRadboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands.
Robert SauerweinTropIQ Health Sciences, Nijmegen, The Netherlands.
Katharine A CollinsRadboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands.
Teun BousemaRadboud Institute for Health Sciences and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands. Teun.Bousema@radboudumc.nl.ORCID http://orcid.org/0000-0003-2666-094X

Funding

European Research Council ERC-CoG 864180H2020 Research Infrastructures INFRAIA
6 · The paper itself

Abstract

backgroundThe ability to culture Plasmodium falciparum continuously in vitro has enabled stable access to asexual and sexual parasites for malaria research. The portfolio of isolates has remained limited and research is still largely based on NF54 and its derived clone 3D7. Since 1978, isolates were collected and cryopreserved at Radboudumc from patients presenting at the hospital. Here, procedures are described for culture adaptation of asexual parasites, cloning and production of sexual stage parasites responsible for transmission (gametocytes) and production of oocysts in Anopheles mosquitoes. This study aimed to identify new culture-adapted transmissible P. falciparum isolates, originating from distinct geographical locations.

methodsOut of a collection of 121 P. falciparum isolates stored in liquid nitrogen, 21 from different geographical origin were selected for initial testing. Isolates were evaluated for their ability to be asexually cultured in vitro, their gametocyte production capacity, and consistent generation of oocysts.

resultsOut of 21 isolates tested, twelve were excluded from further analysis due to lack of mature gametocyte production (n = 1) or generation of satisfactory numbers of oocysts in mosquitoes (n = 11). Nine isolates fulfilled selection criteria and were cloned by limiting dilution and retested. After cloning, one isolate was excluded for not showing transmission. The remaining eight isolates transmitted to Anopheles stephensi or Anopheles coluzzii mosquitoes and were categorized into two groups with a reproducible mean oocyst infection intensity above (n = 5) or below five (n = 3).

conclusionsThese new P. falciparum culture-adapted isolates with reproducible transmission to Anopheles mosquitoes are a valuable addition to the malaria research tool box. They can aid in the development of malaria interventions and will be particularly useful for those studying malaria transmission.

Indexed as

AnimalsAnophelesGeographyMosquito VectorsPlasmodium falciparumSpecies SpecificityAnophelesClinical isolatesCloningCulture adaptationGametocyteMalariaOocystsParasite cultureTransmission

Identifiers

PMID34565372
PMCPMC8474906

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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.