CXCL16 regulates cell-mediated immunity to Salmonella enterica serovar Enteritidis via promotion of gamma interferon production.
Infect Immun
; 74(12): 6885-94, 2006 Dec.
Article
in En
| MEDLINE
| ID: mdl-16982830
ABSTRACT
CXCL16 is a recently discovered multifaceted chemokine that has been shown not only to recruit activated T lymphocytes but also to play a direct role in the binding and phagocytosis of bacteria by professional antigen-presenting cells. In this study, we investigated the role of CXCL16 in vivo in the regulation of the immune response using a murine model of Salmonella enterica serovar Enteritidis infection. The expression of CXCL16 was strongly upregulated in the spleens and livers of animals developing an immune response to a primary acute infection but not in the Peyer's patches. Animals developing a secondary response after reexposure to the bacteria displayed a similar pattern of expression. During the primary response, prior treatment with neutralizing antibodies to CXCL16 induced a significant increase in bacterial burden in the spleen and liver. The production of gamma interferon (IFN-gamma) by the lymphocytes in the spleen was decreased by anti-CXCL16 treatment. In comparison, during the secondary response, anti-CXCL16 treatment also significantly increased bacterial burden in both the spleen and liver but had no effect on IFN-gamma production. No role was found for CXCL16 in the production of antibody against SefA, a major surface antigen of S. enteritidis. Together, these results demonstrate a role for CXCL16 in the control of bacterial colonization of target organs and, more specifically, in the regulation of the cell-mediated arm of the primary response to S. enteritidis.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Salmonella enteritidis
/
Salmonella Infections
/
Interferon-gamma
/
Chemokines, CXC
/
Receptors, Scavenger
Limits:
Animals
Language:
En
Journal:
Infect Immun
Year:
2006
Document type:
Article
Affiliation country:
Australia