| First Author | Beatty SC | Year | 2016 |
| Journal | Genes Immun | Volume | 17 |
| Issue | 1 | Pages | 19-29 |
| PubMed ID | 26562079 | Mgi Jnum | J:276524 |
| Mgi Id | MGI:6307538 | Doi | 10.1038/gene.2015.41 |
| Citation | Beatty SC, et al. (2016) Survival analysis and microarray profiling identify Cd40 as a candidate for the Salmonella susceptibility locus, Ity5. Genes Immun 17(1):19-29 |
| abstractText | The outcome of infection with Salmonella Typhimurium in mouse models of human typhoid fever is dependent upon a coordinated complex immune response. A panel of recombinant congenic strains (RCS) derived from reciprocal backcross of A/J and C57BL/6J mice was screened for their susceptibility to Salmonella infection and two susceptibility loci, Ity4 (Immunity to Typhimurium locus 4) and Ity5, were identified. We validated Ity5 in a genetic environment free of the impact of Ity4 using a cross between A/J and 129S6. Using a time-series analysis of genome-wide transcription during infection, comparing A/J with AcB60 mice having a C57BL/6J-derived Ity5 interval, we have identified the differential expression of the positional candidate gene Cd40, Cd40-associated signaling pathways, and the differential expression of numerous genes expressed in neutrophils. CD40 is known to coordinate T cell-dependent B-cell responses and myeloid cell activation. In fact, CD40 signaling is altered in A/J mice as seen by impaired IgM upregulation during infection, decreased Ig class switching, neutropenia, reduced granulocyte recruitment in response to infection and inflammation, and decreased ERK1/2 activity. These results suggest that altered CD40 signaling and granulocyte recruitment in response to infection are responsible for the Ity5-associated Salmonella susceptibility of A/J mice. |
