Axin1 prevents salmonella invasiveness and inflammatory response in intestinal epithelial cells

Yong Guo Zhang, Shaoping Wu, Yinglin Xia, Di Chen, Elaine O. Petrof, Erika C. Claud, Wei Hsu, Jun Sun

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Background: Axin1 and its homolog Axin2 are scaffold proteins essential for regulating Wnt signaling. Axin-dependent regulation of Wnt is important for various developmental processes and human diseases. However, the involvement of Axin1 and Axin2 in host defense and inflammation remains to be determined. Methods/Principal Findings: Here, we report that Axin1, but not Axin2, plays an essential role in host-pathogen interaction mediated by the Wnt pathway. Pathogenic Salmonella colonization greatly reduces the level of Axin1 in intestinal epithelial cells. This reduction is regulated at the posttranslational level in early onset of the bacterial infection. Further analysis reveals that the DIX domain and Ser614 of Axin1 are necessary for the Salmonella-mediated modulation through ubiquitination and SUMOylation. Conclusion/Significance: Axin1 apparently has a preventive effect on bacterial invasiveness and inflammatory response during the early stages of infection. The results suggest a distinct biological function of Axin1 and Axin2 in infectious disease and intestinal inflammation while they are functionally equivalent in developmental settings.

Original languageEnglish (US)
Article numbere34942
JournalPloS one
Volume7
Issue number4
DOIs
StatePublished - 2012

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