CCR6-Mediated Dendritic Cell Activation of Pathogen-Specific T Cells in Peyer's Patches

Rosa Maria Salazar-Gonzalez, Jan H. Niess, David J. Zammit, Rajesh Ravindran, Aparna Srinivasan, Joseph R. Maxwell, Thomas Stoklasek, Rajwardhan Yadav, Ifor R. Williams, Xiubin Gu, Beth A. McCormick, Michael A. Pazos, Anthony T. Vella, Leo Lefrancois, Hans Christian Reinecker, Stephen J. McSorley

Research output: Contribution to journalArticlepeer-review

207 Scopus citations


T cell activation by dendritic cells (DCs) is critical to the initiation of adaptive immune responses and protection against pathogens. Here, we demonstrate that a specialized DC subset in Peyer's patches (PPs) mediates the rapid activation of pathogen specific T cells. This DC subset is characterized by the expression of the chemokine receptor CCR6 and is found only in PPs. CCR6+ DCs were recruited into the dome regions of PPs upon invasion of the follicle associated epithelium (FAE) by an enteric pathogen and were responsible for the rapid local activation of pathogen-specific T cells. CCR6-deficient DCs were unable to respond to bacterial invasion of PPs and failed to initiate T cell activation, resulting in reduced defense against oral infection. Thus, CCR6-dependent regulation of DCs is responsible for localized T cell dependent defense against entero-invasive pathogens.

Original languageEnglish (US)
Pages (from-to)623-632
Number of pages10
Issue number5
StatePublished - May 2006
Externally publishedYes



ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases


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