Evidence map›Paper›PMID 19222852›Full record

ArticleBMC microbiology2009

Short hairpin RNA-mediated knockdown of protein expression in Entamoeba histolytica.

Alicia S Linford, Heriberto Moreno, Katelyn R Good, Hanbang Zhang, Upinder Singh, William A Petri

Abstract read
In one paragraph

Article in BMC microbiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing 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

27 citing papers in PubMed.

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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

6 authors.

Alicia S LinfordDepartment of Microbiology, University of Virginia, Charlottesville, Virginia, USA. asl2c@virginia.edu
Heriberto Moreno
Katelyn R Good
Hanbang Zhang
Upinder Singh
William A Petri

Funding

INFECTIOUS DISEASES TRAINING PROGRAMT32AI007046 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI Alison K Criss, William A Petri · 1985 to 2026
$15.3M
UVA Digestive Health Research CenterP30DK067629 · NIDDK · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI PIZARRO, THERESA TORRES · 2004 to 2008
$5.6M
Global Biothreats Training ProgramT32AI055432 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI CRISS, ALISON K, PETRI, WILLIAM A · 2003 to 2022
$4.0M
GENE EXPRESSION IN ENTAMOEBA HISTOLYTICAR01AI037941 · NIAID · UNIVERSITY OF VIRGINIA CHARLOTTESVILLE · PI PETRI, WILLIAM A · 1996 to 2008
$2.3M
NIAID NIH HHS AI 37941NIAID NIH HHS T32 AI007046NIAID NIH HHS T32 AI055432NIDDK NIH HHS P30 DK067629
6 · The paper itself

Abstract

backgroundEntamoeba histolytica is an intestinal protozoan parasite of humans. The genome has been sequenced, but the study of individual gene products has been hampered by the lack of the ability to generate gene knockouts. We chose to test the use of RNA interference to knock down gene expression in Entamoeba histolytica.

resultsAn episomal vector-based system, using the E. histolytica U6 promoter to drive expression of 29-basepair short hairpin RNAs, was developed to target protein-encoding genes in E. histolytica. The short hairpin RNAs successfully knocked down protein levels of all three unrelated genes tested with this system: Igl, the intermediate subunit of the galactose- and N-acetyl-D-galactosamine-inhibitable lectin; the transcription factor URE3-BP; and the membrane binding protein EhC2A. Igl levels were reduced by 72%, URE3-BP by 89%, and EhC2A by 97%.

conclusionUse of the U6 promoter to drive expression of 29-basepair short hairpin RNAs is effective at knocking down protein expression for unrelated genes in Entamoeba histolytica, providing a useful tool for the study of this parasite.

Indexed as

Gene Knockdown TechniquesAnimalsEntamoeba histolyticaGene Expression RegulationGenes, ProtozoanPromoter Regions, GeneticProtozoan ProteinsRNARNA InterferenceRNA, ProtozoanRNA, Small InterferingTransfectionProtozoan ProteinsRNARNA primersRNA, ProtozoanRNA, Small Interfering

Identifiers

PMID19222852
PMCPMC2652455

What OpenQuestion holds

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LicenceCC BY
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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.