Evidence map›Paper›PMID 19924309›Full record

ArticlePloS one2009

Visualisation and quantitative analysis of the rodent malaria liver stage by real time imaging.

Ivo H J Ploemen, Miguel Prudêncio, Bruno G Douradinha, Jai Ramesar, Jannik Fonager, Geert-Jan van Gemert, Adrian J F Luty, Cornelus C Hermsen, Robert W Sauerwein, Fernanda G Baptista and 7 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 125 papers.

0numbers the graph read from it
0cells of the map it votes in
125citing papers in PubMed
17.0field-weighted citation impact, top 1% 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

125 citing papers in PubMed, 240 citations in OpenAlex.

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65 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 at 5 institutions in 3 countries.

Ivo H J PloemenDepartment of Medical Microbiology, Radboud University Nijmegen Medical Centre (RUNMC), Nijmegen, The Netherlands.
Miguel Prudêncio
Bruno G Douradinha
Jai Ramesar
Jannik Fonager
Geert-Jan van Gemert
Adrian J F Luty
Cornelus C Hermsen
Robert W Sauerwein
Fernanda G Baptista
Maria M Mota
Andrew P Waters
Ivo Que
Clemens W G M Lowik
Shahid M Khan
Chris J Janse
Blandine M D Franke-Fayard
Leiden University Medical Center · NLRadboud University Medical Center · NLUniversity of Lisbon · PTRadboud University Nijmegen · NLUniversity of Glasgow · GB

Funding

Wellcome Trust 083811
6 · The paper itself

Abstract

The quantitative analysis of Plasmodium development in the liver in laboratory animals in cultured cells is hampered by low parasite infection rates and the complicated methods required to monitor intracellular development. As a consequence, this important phase of the parasite's life cycle has been poorly studied compared to blood stages, for example in screening anti-malarial drugs. Here we report the use of a transgenic P. berghei parasite, PbGFP-Luc(con), expressing the bioluminescent reporter protein luciferase to visualize and quantify parasite development in liver cells both in culture and in live mice using real-time luminescence imaging. The reporter-parasite based quantification in cultured hepatocytes by real-time imaging or using a microplate reader correlates very well with established quantitative RT-PCR methods. For the first time the liver stage of Plasmodium is visualized in whole bodies of live mice and we were able to discriminate as few as 1-5 infected hepatocytes per liver in mice using 2D-imaging and to identify individual infected hepatocytes by 3D-imaging. The analysis of liver infections by whole body imaging shows a good correlation with quantitative RT-PCR analysis of extracted livers. The luminescence-based analysis of the effects of various drugs on in vitro hepatocyte infection shows that this method can effectively be used for in vitro screening of compounds targeting Plasmodium liver stages. Furthermore, by analysing the effect of primaquine and tafenoquine in vivo we demonstrate the applicability of real time imaging to assess parasite drug sensitivity in the liver. The simplicity and speed of quantitative analysis of liver-stage development by real-time imaging compared to the PCR methodologies, as well as the possibility to analyse liver development in live mice without surgery, opens up new possibilities for research on Plasmodium liver infections and for validating the effect of drugs and vaccines on the liver stage of Plasmodium.

Indexed as

AnimalsAnimals, Genetically ModifiedCell LineDiagnostic ImagingFemaleGreen Fluorescent ProteinsHepatocytesHumansLiverLuminescenceMalariaMiceMice, Inbred C57BLPlasmodium bergheiReverse Transcriptase Polymerase Chain ReactionSporozoitesGreen Fluorescent Proteins

Identifiers

PMID19924309
PMCPMC2775639
OpenAlexW2005313354

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.