A Toxin-Antitoxin Module of Salmonella Promotes Virulence in Mice

Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the p...

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Published inPLoS pathogens Vol. 9; no. 12; p. e1003827
Main Authors De la Cruz, Miguel A., Zhao, Weidong, Farenc, Carine, Gimenez, Grégory, Raoult, Didier, Cambillau, Christian, Gorvel, Jean-Pierre, Méresse, Stéphane
Format Journal Article
LanguageEnglish
Published United States Public Library of Science 01.12.2013
Public Library of Science (PLoS)
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Abstract Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
AbstractList Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB , plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
  Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from nonpathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also widespread on bacterial chromosomes. These modules promote bacterial persistence in response to specific environmental stresses. So far, the possibility that TA modules could be involved in bacterial virulence has been largely neglected, but recent comparative genomic studies have shown that the presence of TA modules is significantly associated with the pathogenicity of bacteria. Using Salmonella as a model, we investigated whether TA modules help bacteria to overcome the stress conditions encountered during colonization, thereby supporting virulence in the host. By bioinformatics analyses, we found that the genome of the pathogenic bacterium Salmonella Typhimurium encodes at least 11 type II TA modules. Several of these are conserved in other pathogenic strains but absent from non-pathogenic species indicating that certain TA modules might play a role in Salmonella pathogenicity. We show that one TA module, hereafter referred to as sehAB, plays a transient role in virulence in perorally inoculated mice. The use of a transcriptional reporter demonstrated that bacteria in which sehAB is strongly activated are predominantly localized in the mesenteric lymph nodes. In addition, sehAB was shown to be important for the survival of Salmonella in these peripheral lymphoid organs. These data indicate that the transient activation of a type II TA module can bring a selective advantage favouring virulence and demonstrate that TA modules are engaged in Salmonella pathogenesis.
Audience Academic
Author Gorvel, Jean-Pierre
Farenc, Carine
Gimenez, Grégory
Cambillau, Christian
De la Cruz, Miguel A.
Méresse, Stéphane
Zhao, Weidong
Raoult, Didier
AuthorAffiliation 3 INSERM, U631, Marseille, France
2 CNRS, UMR 7280, Marseille, France
6 URMITE, CNRS-IRD UMR 6236, Marseille, France
University of Utah, United States of America
1 Aix-Marseille University, CIML, Marseille, France
4 Aix-Marseille University, AFMB, Marseille, France
5 CNRS, UMR 7257, Marseille, France
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– name: 5 CNRS, UMR 7257, Marseille, France
– name: University of Utah, United States of America
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– name: 2 CNRS, UMR 7280, Marseille, France
– name: 6 URMITE, CNRS-IRD UMR 6236, Marseille, France
– name: 1 Aix-Marseille University, CIML, Marseille, France
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  surname: De la Cruz
  fullname: De la Cruz, Miguel A.
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  surname: Zhao
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  surname: Farenc
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  surname: Gorvel
  fullname: Gorvel, Jean-Pierre
– sequence: 8
  givenname: Stéphane
  surname: Méresse
  fullname: Méresse, Stéphane
BackLink https://www.ncbi.nlm.nih.gov/pubmed/24385907$$D View this record in MEDLINE/PubMed
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ContentType Journal Article
Copyright COPYRIGHT 2013 Public Library of Science
2013 De la Cruz et al 2013 De la Cruz et al
2013 De la Cruz et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: De la Cruz MA, Zhao W, Farenc C, Gimenez G, Raoult D, et al. (2013) A Toxin-Antitoxin Module of Salmonella Promotes Virulence in Mice. PLoS Pathog 9(12): e1003827. doi:10.1371/journal.ppat.1003827
Copyright_xml – notice: COPYRIGHT 2013 Public Library of Science
– notice: 2013 De la Cruz et al 2013 De la Cruz et al
– notice: 2013 De la Cruz et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited: De la Cruz MA, Zhao W, Farenc C, Gimenez G, Raoult D, et al. (2013) A Toxin-Antitoxin Module of Salmonella Promotes Virulence in Mice. PLoS Pathog 9(12): e1003827. doi:10.1371/journal.ppat.1003827
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DocumentTitleAlternate Toxin-Antitoxin Modules in Salmonella Virulence
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IsDoiOpenAccess true
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Issue 12
Keywords Salmonella Infections
Enterotoxins
Humans
Mice, Inbred C57BL
Virulence
Cells, Cultured
Microbial Viability
Lymph Nodes
Salmonella enterica
Animals
Mice
HeLa Cells
Gene Expression Regulation, Bacterial
Language English
License This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
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The authors have declared that no competing interests exist.
Conceived and designed the experiments: MADlC CF GG DR CC JPG SM. Performed the experiments: MADlC WZ CF CC SM. Analyzed the data: MADlC WZ CF GG DR CC JPG SM. Wrote the paper: MADlC CF GG CC SM.
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Snippet Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also...
  Toxin-antitoxin (TA) modules are widely prevalent in both bacteria and archaea. Originally described as stabilizing elements of plasmids, TA modules are also...
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StartPage e1003827
SubjectTerms Animals
Bacteria
Bacteriology
Cells, Cultured
Deoxyribonucleic acid
DNA
Enterotoxins - genetics
Enterotoxins - physiology
Experiments
Gene expression
Gene Expression Regulation, Bacterial
Genomes
Health aspects
HeLa Cells
Host-parasite relationships
Humans
Lymph Nodes - microbiology
Mice
Mice, Inbred C57BL
Microbial Viability - genetics
Microbiological research
Physiological aspects
Plasmids
Prokaryotes
Proteins
Salmonella
Salmonella enterica - drug effects
Salmonella enterica - genetics
Salmonella enterica - pathogenicity
Salmonella Infections - microbiology
Toxins
Virulence
Virulence (Microbiology)
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Title A Toxin-Antitoxin Module of Salmonella Promotes Virulence in Mice
URI https://www.ncbi.nlm.nih.gov/pubmed/24385907
https://www.proquest.com/docview/1490695813
https://pubmed.ncbi.nlm.nih.gov/PMC3868539
https://doaj.org/article/e65d83f5ec874c14b804e140f07ae8b7
http://dx.doi.org/10.1371/journal.ppat.1003827
Volume 9
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