Exploiting a host-commensal interaction to promote intestinal barrier function and enteric pathogen tolerance

Commensal intestinal bacteria can prevent pathogenic infection; however, limited knowledge of the mechanisms by which individual bacterial species contribute to pathogen resistance has restricted their potential for therapeutic application. Here, we examined how colonization of mice with a human com...

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Published inScience immunology Vol. 1; no. 3
Main Authors Pedicord, Virginia A, Lockhart, Ainsley A K, Rangan, Kavita J, Craig, Jeffrey W, Loschko, Jakob, Rogoz, Aneta, Hang, Howard C, Mucida, Daniel
Format Journal Article
LanguageEnglish
Published United States 01.09.2016
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Abstract Commensal intestinal bacteria can prevent pathogenic infection; however, limited knowledge of the mechanisms by which individual bacterial species contribute to pathogen resistance has restricted their potential for therapeutic application. Here, we examined how colonization of mice with a human commensal protects against enteric infections. We show that improves host intestinal epithelial defense programs to limit serotype Typhimurium pathogenesis in multiple models of susceptibility. protection is mediated by a unique peptidoglycan hydrolase, SagA, and requires epithelial expression of pattern recognition receptor components and antimicrobial peptides. Ectopic expression of SagA in non-protective and probiotic bacteria is sufficient to enhance intestinal barrier function and confer resistance against Typhimurium and pathogenesis. These studies demonstrate that specific factors from commensal bacteria can be used to improve host barrier function and limit the pathogenesis of distinct enteric infections.
AbstractList Commensal intestinal bacteria can prevent pathogenic infection; however, limited knowledge of the mechanisms by which individual bacterial species contribute to pathogen resistance has restricted their potential for therapeutic application. Here, we examined how colonization of mice with a human commensal protects against enteric infections. We show that improves host intestinal epithelial defense programs to limit serotype Typhimurium pathogenesis in multiple models of susceptibility. protection is mediated by a unique peptidoglycan hydrolase, SagA, and requires epithelial expression of pattern recognition receptor components and antimicrobial peptides. Ectopic expression of SagA in non-protective and probiotic bacteria is sufficient to enhance intestinal barrier function and confer resistance against Typhimurium and pathogenesis. These studies demonstrate that specific factors from commensal bacteria can be used to improve host barrier function and limit the pathogenesis of distinct enteric infections.
Author Pedicord, Virginia A
Craig, Jeffrey W
Rogoz, Aneta
Rangan, Kavita J
Mucida, Daniel
Loschko, Jakob
Hang, Howard C
Lockhart, Ainsley A K
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  surname: Mucida
  fullname: Mucida, Daniel
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