The role of ST2 receptor in the regulation of Brucella abortus oral infection

Raiany Santos, Priscila C. Campos, Marcella Rungue, Victor Rocha, David Santos, Viviani Mendes, Fabio V. Marinho, Flaviano Martins, Mayra F. Ricci, Diego C. Dos Reis, Geovanni D. Cassali, José Carlos Alves-Filho, Angelica T. Vieira, Sergio C. Oliveira

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The ST2 receptor plays an important role in the gut such as permeability regulation, epithelium regeneration, and promoting intestinal immune modulation. Here, we studied the role of ST2 receptor in a murine model of oral infection with Brucella abortus, its influence on gut homeostasis and control of bacterial replication. Balb/c (wild-type, WT) and ST2 deficient mice (ST2-/-) were infected by oral gavage and the results were obtained at 3 and 14 days post infection (dpi). Our results suggest that ST2-/- are more resistant to B. abortus infection, as a lower bacterial colony-forming unit (CFU) was detected in the livers and spleens of knockout mice, when compared to WT. Additionally, we observed an increase in intestinal permeability in WT-infected mice, compared to ST2-/- animals. Breakage of the intestinal epithelial barrier and bacterial dissemination might be associated with the presence of the ST2 receptor; since, in the knockout mice no change in intestinal permeability was observed after infection. Together with enhanced resistance to infection, ST2-/-produced greater levels of IFN-γ and TNF-α in the small intestine, compared to WT mice. Nevertheless, in the systemic model of infection ST2 plays no role in controlling Brucella replication in vivo. Our results suggest that the ST2 receptor is involved in the invasion process of B. abortus by the mucosa in the oral infection model.

Original languageEnglish (US)
Article number328
JournalPathogens
Volume9
Issue number5
DOIs
StatePublished - May 2020
Externally publishedYes

Keywords

  • Brucella abortus
  • Oral infection
  • ST2 receptor

ASJC Scopus subject areas

  • Immunology and Allergy
  • Molecular Biology
  • Immunology and Microbiology(all)
  • Microbiology (medical)
  • Infectious Diseases

Fingerprint

Dive into the research topics of 'The role of ST2 receptor in the regulation of Brucella abortus oral infection'. Together they form a unique fingerprint.

Cite this