Std fimbriae-fucose interaction increases Salmonella-induced intestinal inflammation and prolongs colonization

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Abdulhadi Suwandi - , Medizinische Hochschule Hannover (MHH) (Autor:in)
  • Alibek Galeev - , Medizinische Hochschule Hannover (MHH) (Autor:in)
  • René Riedel - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Samriti Sharma - , Medizinische Hochschule Hannover (MHH) (Autor:in)
  • Katrin Seeger - , Medizinische Hochschule Hannover (MHH) (Autor:in)
  • Torsten Sterzenbach - , Universität Osnabrück (Autor:in)
  • Lucía García Pastor - , Universidad de Sevilla (Autor:in)
  • Erin C. Boyle - , Medizinische Hochschule Hannover (MHH) (Autor:in)
  • Ohad Gal-Mor - , Sheba Medical Center at Tel Hashomer, Tel Aviv University (Autor:in)
  • Michael Hensel - , Universität Osnabrück (Autor:in)
  • Josep Casadesús - , Universidad de Sevilla (Autor:in)
  • John F. Baines - , Christian-Albrechts-Universität zu Kiel (CAU) (Autor:in)
  • Guntram A. Grassl - , Medizinische Hochschule Hannover (MHH) (Autor:in)

Abstract

Expression of ABO and Lewis histo-blood group antigens by the gastrointestinal epithelium is governed by an α-1,2-fucosyltransferase enzyme encoded by the Fut2 gene. Alterations in mucin glycosylation have been associated with susceptibility to various bacterial and viral infections. Salmonella enterica serovar Typhimurium is a food-borne pathogen and a major cause of gastroenteritis. In order to determine the role of Fut2-dependent glycans in Salmonella-triggered intestinal inflammation, Fut2+/+ and Fut2-/- mice were orally infected with S. Typhimurium and bacterial colonization and intestinal inflammation were analyzed. Bacterial load in the intestine of Fut2-/- mice was significantly lower compared to Fut2+/+ mice. Analysis of histopathological changes revealed significantly lower levels of intestinal inflammation in Fut2-/- mice compared to Fut2+/+ mice and measurement of lipocalin-2 level in feces corroborated histopathological findings. Salmonella express fimbriae that assist in adherence of bacteria to host cells thereby facilitating their invasion. The std fimbrial operon of S. Typhimurium encodes the π-class Std fimbriae which bind terminal α(1,2)-fucose residues. An isogenic mutant of S. Typhimurium lacking Std fimbriae colonized Fut2+/+ and Fut2-/- mice to similar levels and resulted in similar intestinal inflammation. In vitro adhesion assays revealed that bacteria possessing Std fimbriae adhered significantly more to fucosylated cell lines or primary epithelial cells in comparison to cells lacking α(1,2)-fucose. Overall, these results indicate that Salmonella-triggered intestinal inflammation and colonization are dependent on Std-fucose interaction.

Details

OriginalspracheEnglisch
Aufsatznummere1007915
FachzeitschriftPLOS pathogens
Jahrgang15
Ausgabenummer7
PublikationsstatusVeröffentlicht - Juli 2019
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

PubMedCentral PMC6675130
Scopus 85071054915

Schlagworte

Schlagwörter

  • Animals, Bacterial Adhesion, Colitis/etiology, Female, Fimbriae Proteins/genetics, Fimbriae, Bacterial/genetics, Fucose/metabolism, Fucosyltransferases/deficiency, Host Microbial Interactions, Humans, Intestinal Mucosa/metabolism, Male, Mice, Mice, Inbred CBA, Mice, Knockout, Operon, Salmonella Infections, Animal/etiology, Salmonella typhimurium/genetics, Galactoside 2-alpha-L-fucosyltransferase