Evidence map›Paper›PMID 28117431›Full record

ArticleScientific reports2017

Culture adaptation of malaria parasites selects for convergent loss-of-function mutants.

Antoine Claessens, Muna Affara, Samuel A Assefa, Dominic P Kwiatkowski, David J Conway

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 1 pooled it
9.2field-weighted citation impact, top 2% 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

50 citing papers in PubMed, 1 synthesis or guideline pooled it, 90 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. PfApiAT2 is a proline transporter essential for the transmission ofbioRxiv : the preprint server for biology · 2026
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  13. Antimicrobial agents and chemotherapy · 2024
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  15. The global transcriptome ofMicrobiology spectrum · 2023
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  18. Cultivation of Asexual Intraerythrocytic Stages ofPathogens (Basel, Switzerland) · 2023
    Review
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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 3 institutions in 2 countries.

Antoine ClaessensLondon School of Hygiene and Tropical Medicine, London, UK.
Muna AffaraMedical Research Council Unit The Gambia, Atlantic Road, Fajara, P.O. Box 273, Banjul, The Gambia.
Samuel A AssefaLondon School of Hygiene and Tropical Medicine, London, UK.
Dominic P KwiatkowskiThe Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom.
David J ConwayLondon School of Hygiene and Tropical Medicine, London, UK.
London School of Hygiene & Tropical Medicine · GBMRC Unit the Gambia · GMWellcome Sanger Institute · GB

Funding

European Research Council 294428Medical Research Council G0600718Medical Research Council G1100123Medical Research Council MC_EX_MR/L100001/1Medical Research Council MR/M006212/1Wellcome Trust 090770/Z/09/ZWellcome Trust 204911/Z/16/Z
6 · The paper itself

Abstract

Cultured human pathogens may differ significantly from source populations. To investigate the genetic basis of laboratory adaptation in malaria parasites, clinical Plasmodium falciparum isolates were sampled from patients and cultured in vitro for up to three months. Genome sequence analysis was performed on multiple culture time point samples from six monoclonal isolates, and single nucleotide polymorphism (SNP) variants emerging over time were detected. Out of a total of five positively selected SNPs, four represented nonsense mutations resulting in stop codons, three of these in a single ApiAP2 transcription factor gene, and one in SRPK1. To survey further for nonsense mutants associated with culture, genome sequences of eleven long-term laboratory-adapted parasite strains were examined, revealing four independently acquired nonsense mutations in two other ApiAP2 genes, and five in Epac. No mutants of these genes exist in a large database of parasite sequences from uncultured clinical samples. This implicates putative master regulator genes in which multiple independent stop codon mutations have convergently led to culture adaptation, affecting most laboratory lines of P. falciparum. Understanding the adaptive processes should guide development of experimental models, which could include targeted gene disruption to adapt fastidious malaria parasite species to culture.

Indexed as

Adaptation, PhysiologicalAllelesAnimalsCodon, NonsenseGenomeHumansLoss of Function MutationMalaria, FalciparumParasitesPlasmodium falciparumPolymorphism, Single NucleotideSequence Analysis, DNACodon, Nonsense

Identifiers

PMID28117431
PMCPMC5259787
OpenAlexW2581803187

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.