Evidence map›Paper›PMID 28542423›Full record

ArticlePloS one2017

Plasmid-free CRISPR/Cas9 genome editing in Plasmodium falciparum confirms mutations conferring resistance to the dihydroisoquinolone clinical candidate SJ733.

Emily D Crawford, Jenai Quan, Jeremy A Horst, Daniel Ebert, Wesley Wu, Joseph L DeRisi

Open access · goldAbstract read
In one paragraph

Article in PloS one, 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
2.8field-weighted citation impact, top 9% 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, 56 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. CRISPR-Cas9: Taming protozoan parasites with bacterial scissor.Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2022
    Review
  5. Article
  6. CRISPR/Cas9 Editing of the Plasmodium falciparum Genome.Methods in molecular biology (Clifton, N.J.) · 2022
    Review
  7. Article
  8. Article
  9. Article
  10. FnCas12a/crRNA-Mediated Genome Editing inFrontiers in genetics · 2021
    Article
  11. Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Plasmodium falciparum In Vitro Drug Resistance Selections and Gene Editing.Methods in molecular biology (Clifton, N.J.) · 2019
    Article
  18. Article
  19. Review
  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

6 authors at 2 institutions in 1 country.

Emily D CrawfordChan Zuckerberg Biohub, San Francisco, California, United States of America.ORCID http://orcid.org/0000-0003-4182-2337
Jenai QuanChan Zuckerberg Biohub, San Francisco, California, United States of America.
Jeremy A HorstDepartment of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California, United States of America.
Daniel EbertDepartment of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California, United States of America.
Wesley WuDepartment of Biochemistry and Biophysics, University of California San Francisco, San Francisco, California, United States of America.
Joseph L DeRisiChan Zuckerberg Biohub, San Francisco, California, United States of America.
Howard Hughes Medical Institute · USUniversity of California, San Francisco · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Genetic manipulation of the deadly malaria parasite Plasmodium falciparum remains challenging, but the rise of CRISPR/Cas9-based genome editing tools is increasing the feasibility of altering this parasite's genome in order to study its biology. Of particular interest is the investigation of drug targets and drug resistance mechanisms, which have major implications for fighting malaria. We present a new method for introducing drug resistance mutations in P. falciparum without the use of plasmids or the need for cloning homologous recombination templates. We demonstrate this method by introducing edits into the sodium efflux channel PfATP4 by transfection of a purified CRISPR/Cas9-guide RNA ribonucleoprotein complex and a 200-nucleotide single-stranded oligodeoxynucleotide (ssODN) repair template. Analysis of whole genome sequencing data with the variant-finding program MinorityReport confirmed that only the intended edits were made, and growth inhibition assays confirmed that these mutations confer resistance to the antimalarial SJ733. The method described here is ideally suited for the introduction of mutations that confer a fitness advantage under selection conditions, and the novel finding that an ssODN can function as a repair template in P. falciparum could greatly simplify future editing attempts regardless of the nuclease used or the delivery method.

Indexed as

Genome, ProtozoanAmino Acid SequenceBase SequenceCRISPR-Cas SystemsDrug ResistanceGenetic VectorsH(+)-K(+)-Exchanging ATPaseHumansIsoquinolinesMalaria, FalciparumMutationPlasmidsPlasmodium falciparumRNA EditingG 1617H(+)-K(+)-Exchanging ATPaseIsoquinolines

Identifiers

PMID28542423
PMCPMC5439709
OpenAlexW2620206953

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.