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Axin1 prevents Salmonella invasiveness and inflammatory response in intestinal epithelial cells

Yong-guo Zhang1, Shaoping Wu, Yinglin Xia

  • 1Department of Biochemistry, Rush University Medical Center, Chicago, Illinois, United States of America.

Plos One
|April 18, 2012
PubMed
Abstract

Insights

Axin1, a Wnt signaling protein, protects against bacterial infection and inflammation. Salmonella infection reduces Axin1 levels, impacting host defense mechanisms.

Area of Science:

  • Molecular Biology
  • Immunology
  • Cell Biology

Background:

  • Axin1 and Axin2 are crucial scaffold proteins regulating Wnt signaling.
  • Wnt pathway regulation is vital in development and disease.
  • The role of Axin1 and Axin2 in host defense and inflammation is largely unknown.

Purpose of the Study:

  • To investigate the involvement of Axin1 and Axin2 in host defense against bacterial pathogens.
  • To elucidate the role of Axin1 in Wnt-mediated host-pathogen interactions.

Main Methods:

  • Studied host-pathogen interactions mediated by the Wnt pathway.
  • Analyzed Axin1 levels in intestinal epithelial cells during Salmonella infection.
  • Investigated posttranslational modifications (ubiquitination and SUMOylation) affecting Axin1.

Main Results:

  • Axin1, not Axin2, is essential for Wnt-mediated host-pathogen interactions.
  • Salmonella infection significantly reduces intestinal epithelial Axin1 levels.
  • Salmonella-induced Axin1 reduction involves ubiquitination and SUMOylation at the DIX domain and Ser614.

Conclusions:

  • Axin1 plays a preventive role against bacterial invasiveness and inflammation in early infection stages.
  • Axin1 and Axin2 exhibit distinct functions in infectious disease and inflammation, unlike their equivalent roles in development.

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