Evidence map›Paper›PMID 22551809›Full record

ArticleThe Journal of infectious diseases2012

Benznidazole-resistance in Trypanosoma cruzi is a readily acquired trait that can arise independently in a single population.

Ana Maria Mejia, Belinda S Hall, Martin C Taylor, Andrés Gómez-Palacio, Shane R Wilkinson, Omar Triana-Chávez, John M Kelly

Open access · hybridAbstract read
In one paragraph

Article in The Journal of infectious diseases, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed, 1 pooled it
6.8field-weighted citation impact, top 3% 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

78 citing papers in PubMed, 1 synthesis or guideline pooled it, 158 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
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18 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

7 authors at 3 institutions in 2 countries.

Ana Maria MejiaDepartment of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, University of London, United Kingdom.
Belinda S Hall
Martin C Taylor
Andrés Gómez-Palacio
Shane R Wilkinson
Omar Triana-Chávez
John M Kelly
Universidad de Antioquia · COLondon School of Hygiene & Tropical Medicine · GBQueen Mary University of London · GB

Funding

Wellcome TrustWellcome Trust 082342Wellcome Trust 084175
6 · The paper itself

Abstract

Benznidazole is the frontline drug used against Trypanosoma cruzi, the causative agent of Chagas disease. However, treatment failures are often reported. Here, we demonstrate that independently acquired mutations in the gene encoding a mitochondrial nitroreductase (TcNTR) can give rise to distinct drug-resistant clones within a single population. Following selection of benznidazole-resistant parasites, all clones examined had lost one of the chromosomes containing the TcNTR gene. Sequence analysis of the remaining TcNTR allele revealed 3 distinct mutant genes in different resistant clones. Expression studies showed that these mutant proteins were unable to activate benznidazole. This correlated with loss of flavin mononucleotide binding. The drug-resistant phenotype could be reversed by transfection with wild-type TcNTR. These results identify TcNTR as a central player in acquired resistance to benznidazole. They also demonstrate that T. cruzi has a propensity to undergo genetic changes that can lead to drug resistance, a finding that has implications for future therapeutic strategies.

Indexed as

AllelesAmino Acid SequenceAnimalsChlorocebus aethiopsCloning, MolecularDrug ResistanceGene Expression RegulationGenetic VariationMolecular Sequence DataMutationNitroimidazolesNitroreductasesProtozoan ProteinsRatsTrypanocidal AgentsTrypanosoma cruzibenzonidazoleNitroimidazolesNitroreductasesProtozoan ProteinsTrypanocidal Agents

Identifiers

PMID22551809
PMCPMC3379838
OpenAlexW2164686341

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.