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Characterization of the cytolethal distending toxin (typhoid toxin) in non-typhoidal Salmonella serovars

Overview of attention for article published in Gut Pathogens, July 2015
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  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (85th percentile)
  • Good Attention Score compared to outputs of the same age and source (70th percentile)

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Title
Characterization of the cytolethal distending toxin (typhoid toxin) in non-typhoidal Salmonella serovars
Published in
Gut Pathogens, July 2015
DOI 10.1186/s13099-015-0065-1
Pubmed ID
Authors

Lorraine D Rodriguez-Rivera, Barbara M Bowen, Henk C den Bakker, Gerald E Duhamel, Martin Wiedmann

Abstract

For many putative Salmonella enterica subsp. enterica virulence genes, functional characterization across serovars has been limited. Cytolethal distending toxin B (CdtB) is an incompletely characterized virulence factor that is found not only in Salmonella enterica subsp. enterica serovar Typhi (Salmonella Typhi) and dozens of Gram negative bacterial pathogens, but also in non-typhoidal Salmonella (NTS) serovars. A comparative genomics approach was performed to characterize sequence conservation of the typhoid toxin (TT), encoded in the CdtB-islet, between Salmonella Typhi and NTS serovars. The cytotoxic activity of representative Salmonella enterica subsp. enterica serovars Javiana, Montevideo and Schwarzengrund strains and their respective isogenic cdtB mutants was determined in human intestinal epithelial Henle-407 cells by assessment of cell cycle progression of infected cells using fluorescence-activated cell sorting (FACS). Two-way analysis of variance (ANOVA) was used to determine whether cdtB deletion had a significant (p < 0.05) effect on the percentage of Henle-407 cells at each stage of the cell cycle. Here we show that a CdtB-islet encoding the cytolethal distending toxin B (CdtB), pertussis-like toxin A (PltA), and pertussis-like toxin B (PltB) is present in a dozen NTS serovars and that these proteins have a high level of sequence conservation and each form monophyletic clades with corresponding Salmonella Typhi genes. Human epithelial Henle-407 cells infected with three representative CdtB-encoding NTS serovars displayed G2/M phase cell cycle arrest that was absent in cells infected with corresponding isogenic cdtB null mutants (p < 0.0001 for the factor ∆cdtB deletion). Our results show that CdtB encoded by NTS serovars has a genomic organization, amino acid sequence conservation and biological activity similar to the TT, and thus, may contribute to disease pathogenesis.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 47 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 47 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 15 32%
Student > Ph. D. Student 11 23%
Researcher 6 13%
Student > Postgraduate 3 6%
Professor 3 6%
Other 3 6%
Unknown 6 13%
Readers by discipline Count As %
Agricultural and Biological Sciences 10 21%
Immunology and Microbiology 8 17%
Biochemistry, Genetics and Molecular Biology 8 17%
Medicine and Dentistry 6 13%
Veterinary Science and Veterinary Medicine 3 6%
Other 1 2%
Unknown 11 23%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 11. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 June 2019.
All research outputs
#2,860,338
of 22,817,213 outputs
Outputs from Gut Pathogens
#72
of 522 outputs
Outputs of similar age
#38,358
of 263,414 outputs
Outputs of similar age from Gut Pathogens
#3
of 10 outputs
Altmetric has tracked 22,817,213 research outputs across all sources so far. Compared to these this one has done well and is in the 87th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 522 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 7.8. This one has done well, scoring higher than 86% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 263,414 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 85% of its contemporaries.
We're also able to compare this research output to 10 others from the same source and published within six weeks on either side of this one. This one has scored higher than 7 of them.